el14af - Space Game

ELEC2645 (2015/16) » Code » el14af

ELEC2645 (2015/16) / Mbed 2 deprecated el14af

Space Game

Dependencies: N5110 mbed

ESP.cpp@0:10704407da46, 2016-05-05 (annotated)

Committer:: el14af
Date:: Thu May 05 10:21:22 2016 +0000
Revision:: 0:10704407da46

final awesome

Who changed what in which revision?

User	Revision	Line number	New contents of line
el14af	0:10704407da46	1	//
el14af	0:10704407da46	2	// Elec 2645
el14af	0:10704407da46	3	// Embedded Systems Project
el14af	0:10704407da46	4	// 5 March 2016
el14af	0:10704407da46	5	// Aleksander Filipiak
el14af	0:10704407da46	6
el14af	0:10704407da46	7	#include "ESP.h"
el14af	0:10704407da46	8
el14af	0:10704407da46	9
el14af	0:10704407da46	10	// ---------------------------------------------------------------------------MAIN()-----------------------------------------------------------------------------------------------------
el14af	0:10704407da46	11
el14af	0:10704407da46	12	int main()
el14af	0:10704407da46	13	{
el14af	0:10704407da46	14	// initialise buttons
el14af	0:10704407da46	15	speed_button.mode(PullDown);
el14af	0:10704407da46	16	start_button.mode(PullDown);
el14af	0:10704407da46	17	pause_button.mode(PullDown);
el14af	0:10704407da46	18	pause_button.rise(&pause_isr);
el14af	0:10704407da46	19
el14af	0:10704407da46	20	//initialise display
el14af	0:10704407da46	21	lcd.init();
el14af	0:10704407da46	22
el14af	0:10704407da46	23	//calibrate joystick
el14af	0:10704407da46	24	calibrateJoystick();
el14af	0:10704407da46	25
el14af	0:10704407da46	26	// print border
el14af	0:10704407da46	27	print_border(0,83,0,47);
el14af	0:10704407da46	28
el14af	0:10704407da46	29	// position in menu, 0 = start game, 1 = help
el14af	0:10704407da46	30	bool position = 0;
el14af	0:10704407da46	31
el14af	0:10704407da46	32	// attach joystick
el14af	0:10704407da46	33	pollJoystick.attach(&updateJoystick,0.05);
el14af	0:10704407da46	34
el14af	0:10704407da46	35
el14af	0:10704407da46	36	// menu
el14af	0:10704407da46	37	while (1) {
el14af	0:10704407da46	38
el14af	0:10704407da46	39	// select menu item: start game
el14af	0:10704407da46	40	if (joystick.direction == UP) {
el14af	0:10704407da46	41	position = 0;
el14af	0:10704407da46	42	}
el14af	0:10704407da46	43	// help
el14af	0:10704407da46	44	else if (joystick. direction == DOWN) {
el14af	0:10704407da46	45	position = 1;
el14af	0:10704407da46	46	}
el14af	0:10704407da46	47
el14af	0:10704407da46	48	//clear lcd
el14af	0:10704407da46	49	lcd.clear();
el14af	0:10704407da46	50
el14af	0:10704407da46	51	// print menu items
el14af	0:10704407da46	52	lcd.printString("START GAME",20,1);
el14af	0:10704407da46	53	lcd.printString("HELP",20,3);
el14af	0:10704407da46	54
el14af	0:10704407da46	55	// print cursor at appropriate position
el14af	0:10704407da46	56	if (!position) {
el14af	0:10704407da46	57	lcd.drawRect(15,10,2,2,0);
el14af	0:10704407da46	58	} else {
el14af	0:10704407da46	59	lcd.drawRect(15,25,2,2,0);
el14af	0:10704407da46	60	}
el14af	0:10704407da46	61
el14af	0:10704407da46	62	// refresh border
el14af	0:10704407da46	63	print_border(0,83,0,47);
el14af	0:10704407da46	64	// smaller ornamental border
el14af	0:10704407da46	65	print_border(2,81,2,45);
el14af	0:10704407da46	66
el14af	0:10704407da46	67	// refresh screen
el14af	0:10704407da46	68	lcd.refresh();
el14af	0:10704407da46	69
el14af	0:10704407da46	70	// if either button is pressed and the help menu function is selected bring up the help menu
el14af	0:10704407da46	71	if ((start_button \|\| speed_button) && position) {
el14af	0:10704407da46	72
el14af	0:10704407da46	73	// outout variable
el14af	0:10704407da46	74	int output;
el14af	0:10704407da46	75
el14af	0:10704407da46	76	// create array for counter
el14af	0:10704407da46	77	int help_counter [5] = {0,1,2,3,4};
el14af	0:10704407da46	78
el14af	0:10704407da46	79	// state variable
el14af	0:10704407da46	80	int state = 0;
el14af	0:10704407da46	81
el14af	0:10704407da46	82	// help loop
el14af	0:10704407da46	83	while (1) {
el14af	0:10704407da46	84
el14af	0:10704407da46	85	// check which state the counter is in and see which the next state should be next,
el14af	0:10704407da46	86	// depending on direction
el14af	0:10704407da46	87	switch(state) {
el14af	0:10704407da46	88	case 0:
el14af	0:10704407da46	89	switch(joystick.direction) {
el14af	0:10704407da46	90	case RIGHT:
el14af	0:10704407da46	91	state = 0;
el14af	0:10704407da46	92	break;
el14af	0:10704407da46	93	case LEFT:
el14af	0:10704407da46	94	state = 1;
el14af	0:10704407da46	95	break;
el14af	0:10704407da46	96	}
el14af	0:10704407da46	97	break;
el14af	0:10704407da46	98	//
el14af	0:10704407da46	99	case 1:
el14af	0:10704407da46	100
el14af	0:10704407da46	101	switch(joystick.direction) {
el14af	0:10704407da46	102	case RIGHT:
el14af	0:10704407da46	103	state = 0;
el14af	0:10704407da46	104	break;
el14af	0:10704407da46	105	case LEFT:
el14af	0:10704407da46	106	state = 2;
el14af	0:10704407da46	107	break;
el14af	0:10704407da46	108	}
el14af	0:10704407da46	109	break;
el14af	0:10704407da46	110	case 2:
el14af	0:10704407da46	111
el14af	0:10704407da46	112	switch(joystick.direction) {
el14af	0:10704407da46	113	case RIGHT:
el14af	0:10704407da46	114	state = 1;
el14af	0:10704407da46	115	break;
el14af	0:10704407da46	116	case LEFT:
el14af	0:10704407da46	117	state = 3;
el14af	0:10704407da46	118	break;
el14af	0:10704407da46	119	}
el14af	0:10704407da46	120	break;
el14af	0:10704407da46	121	case 3:
el14af	0:10704407da46	122
el14af	0:10704407da46	123	switch(joystick.direction) {
el14af	0:10704407da46	124	case RIGHT:
el14af	0:10704407da46	125	state = 0;
el14af	0:10704407da46	126	break;
el14af	0:10704407da46	127	case LEFT:
el14af	0:10704407da46	128	state = 4;
el14af	0:10704407da46	129	break;
el14af	0:10704407da46	130	}
el14af	0:10704407da46	131	// last state brings the user back to the main menu
el14af	0:10704407da46	132	case 4:
el14af	0:10704407da46	133	break;
el14af	0:10704407da46	134	}
el14af	0:10704407da46	135
el14af	0:10704407da46	136	// outout current state
el14af	0:10704407da46	137	output = help_counter[state];
el14af	0:10704407da46	138
el14af	0:10704407da46	139	lcd.clear();
el14af	0:10704407da46	140
el14af	0:10704407da46	141	// refresh border
el14af	0:10704407da46	142	print_border(0,83,0,47);
el14af	0:10704407da46	143	// smaller ornamental border
el14af	0:10704407da46	144	print_border(2,81,2,45);
el14af	0:10704407da46	145
el14af	0:10704407da46	146	// print instructions based on counter output
el14af	0:10704407da46	147	if (output ==0) {
el14af	0:10704407da46	148
el14af	0:10704407da46	149	// instructions
el14af	0:10704407da46	150	lcd.printString("USE",10,1);
el14af	0:10704407da46	151	lcd.printString("JOYSTICK",10,2);
el14af	0:10704407da46	152	lcd.printString("TO MOVE",10,3);
el14af	0:10704407da46	153	lcd.printString("SHIP",10,4);
el14af	0:10704407da46	154	} else if (output ==1) {
el14af	0:10704407da46	155
el14af	0:10704407da46	156	// instructions
el14af	0:10704407da46	157	lcd.printString("START BUTTON:",5,1);
el14af	0:10704407da46	158	lcd.printString("PAUSE",10,2);
el14af	0:10704407da46	159	lcd.printString("SPEED BUTTON:",5,3);
el14af	0:10704407da46	160	lcd.printString("FASTER SHIP",10,4);
el14af	0:10704407da46	161	} else if (output ==2) {
el14af	0:10704407da46	162
el14af	0:10704407da46	163	// instructions
el14af	0:10704407da46	164	lcd.drawRect(5,10,2,2,0);
el14af	0:10704407da46	165	lcd.printString("+ 8 seconds",15,1);
el14af	0:10704407da46	166	lcd.drawLine(5,27,7,27,1);
el14af	0:10704407da46	167	lcd.drawLine(6,26,6,28,1);
el14af	0:10704407da46	168	lcd.printString("- 5 seconds",15,3);
el14af	0:10704407da46	169
el14af	0:10704407da46	170	} else if (output ==3) {
el14af	0:10704407da46	171
el14af	0:10704407da46	172	// instructions
el14af	0:10704407da46	173	lcd.printString("DON'T LET",10,1);
el14af	0:10704407da46	174	lcd.printString("THE TIMER",10,2);
el14af	0:10704407da46	175	lcd.printString("RUN OUT!",10,3);
el14af	0:10704407da46	176	// 5th state breaks the loop and leads back to menu
el14af	0:10704407da46	177	} else if (output ==4) {
el14af	0:10704407da46	178
el14af	0:10704407da46	179	break;
el14af	0:10704407da46	180	}
el14af	0:10704407da46	181	lcd.refresh();
el14af	0:10704407da46	182
el14af	0:10704407da46	183	//short delay
el14af	0:10704407da46	184	wait(0.3);
el14af	0:10704407da46	185
el14af	0:10704407da46	186	}
el14af	0:10704407da46	187	}
el14af	0:10704407da46	188
el14af	0:10704407da46	189	// if the button has been pressed and Start Game is selected, break the menu loop
el14af	0:10704407da46	190	// and continue to game initialisation
el14af	0:10704407da46	191	if ((start_button \|\| speed_button) && !position) {
el14af	0:10704407da46	192	break;
el14af	0:10704407da46	193	}
el14af	0:10704407da46	194
el14af	0:10704407da46	195	wait(0.1);
el14af	0:10704407da46	196
el14af	0:10704407da46	197	}
el14af	0:10704407da46	198
el14af	0:10704407da46	199	lcd.clear();
el14af	0:10704407da46	200
el14af	0:10704407da46	201	// print game border
el14af	0:10704407da46	202	print_border(0,83,8,47);
el14af	0:10704407da46	203
el14af	0:10704407da46	204	// setup
el14af	0:10704407da46	205	setup_game();
el14af	0:10704407da46	206
el14af	0:10704407da46	207	lcd.refresh();
el14af	0:10704407da46	208
el14af	0:10704407da46	209	// flashing press start
el14af	0:10704407da46	210	while(1) {
el14af	0:10704407da46	211
el14af	0:10704407da46	212	lcd.printString ("PRESS START",10,2);
el14af	0:10704407da46	213
el14af	0:10704407da46	214	lcd.refresh();
el14af	0:10704407da46	215
el14af	0:10704407da46	216	wait(0.5);
el14af	0:10704407da46	217
el14af	0:10704407da46	218	lcd.printString (" ",10,2);
el14af	0:10704407da46	219
el14af	0:10704407da46	220	wait(0.3);
el14af	0:10704407da46	221
el14af	0:10704407da46	222	// break loop when start button is pressed
el14af	0:10704407da46	223	if (start_button == 1) {
el14af	0:10704407da46	224	break;
el14af	0:10704407da46	225	}
el14af	0:10704407da46	226	}
el14af	0:10704407da46	227
el14af	0:10704407da46	228	wait(0.5);
el14af	0:10704407da46	229
el14af	0:10704407da46	230	// attach tickers:
el14af	0:10704407da46	231
el14af	0:10704407da46	232	// ship
el14af	0:10704407da46	233	ship_mover.attach(&speed_change,0.03); // ship mover
el14af	0:10704407da46	234	//turrets
el14af	0:10704407da46	235	turret_mover.attach(&update_turrets,0.07); // turret mover
el14af	0:10704407da46	236	shooter.attach(&shoot,0.5); // shooter
el14af	0:10704407da46	237	// missles
el14af	0:10704407da46	238	missle_mover.attach(&update_missles,0.04); // missle mover
el14af	0:10704407da46	239	hit_checker.attach(&check_hit,0.04); // hit checker
el14af	0:10704407da46	240	// collectibles
el14af	0:10704407da46	241	collect_printer.attach(&print_collect,5.0); // collectible printer
el14af	0:10704407da46	242	collect_checker.attach(&check_collect,0.05); // collectible checker
el14af	0:10704407da46	243	collect_updater.attach(&update_collect,0.1); // collectible updater
el14af	0:10704407da46	244	collect_timer.attach(&collect_timeout,10.0); // collectible timer
el14af	0:10704407da46	245	// timer
el14af	0:10704407da46	246	timer.attach(&time_left,1.0);
el14af	0:10704407da46	247
el14af	0:10704407da46	248	// reset timer
el14af	0:10704407da46	249	g_time_left = 30;
el14af	0:10704407da46	250
el14af	0:10704407da46	251	// game loop
el14af	0:10704407da46	252	while(1) {
el14af	0:10704407da46	253
el14af	0:10704407da46	254
el14af	0:10704407da46	255	// pause loop
el14af	0:10704407da46	256	// if pause button is pressed
el14af	0:10704407da46	257	if (g_pause_flag) {
el14af	0:10704407da46	258
el14af	0:10704407da46	259	g_pause_flag = 0;
el14af	0:10704407da46	260
el14af	0:10704407da46	261	// detach tickers to stop gameplay
el14af	0:10704407da46	262	//ship
el14af	0:10704407da46	263	ship_mover.detach(); // ship mover
el14af	0:10704407da46	264	//turrets
el14af	0:10704407da46	265	turret_mover.detach(); // turret mover
el14af	0:10704407da46	266	shooter.detach(); // shooter
el14af	0:10704407da46	267	// missles
el14af	0:10704407da46	268	missle_mover.detach(); // missle mover
el14af	0:10704407da46	269	hit_checker.detach(); // hit checker
el14af	0:10704407da46	270	// collectibles
el14af	0:10704407da46	271	collect_printer.detach();// collectible printer
el14af	0:10704407da46	272	collect_checker.detach();// collectible checker
el14af	0:10704407da46	273	collect_updater.detach();// collectible updater
el14af	0:10704407da46	274	collect_timer.detach(); // collectible timer
el14af	0:10704407da46	275	// timer
el14af	0:10704407da46	276	timer.detach();
el14af	0:10704407da46	277
el14af	0:10704407da46	278	while(1) {
el14af	0:10704407da46	279
el14af	0:10704407da46	280
el14af	0:10704407da46	281	// flashing pause
el14af	0:10704407da46	282	lcd.printString(" ",25,2);
el14af	0:10704407da46	283
el14af	0:10704407da46	284	wait(0.3);
el14af	0:10704407da46	285
el14af	0:10704407da46	286	lcd.printString("PAUSE",25,2);
el14af	0:10704407da46	287
el14af	0:10704407da46	288	wait(0.5);
el14af	0:10704407da46	289
el14af	0:10704407da46	290	lcd.refresh();
el14af	0:10704407da46	291
el14af	0:10704407da46	292	// if the start button is pressed again game starts again
el14af	0:10704407da46	293	if (g_pause_flag) {
el14af	0:10704407da46	294	break;
el14af	0:10704407da46	295	}
el14af	0:10704407da46	296
el14af	0:10704407da46	297	}
el14af	0:10704407da46	298	// reset flag
el14af	0:10704407da46	299	g_pause_flag = 0;
el14af	0:10704407da46	300
el14af	0:10704407da46	301	// clear pause
el14af	0:10704407da46	302	lcd.printString(" ",25,2);
el14af	0:10704407da46	303
el14af	0:10704407da46	304	// re-attach tickers to restart gameplay
el14af	0:10704407da46	305	// ship
el14af	0:10704407da46	306	ship_mover.attach(&speed_change,0.03); // ship mover
el14af	0:10704407da46	307	//turrets
el14af	0:10704407da46	308	turret_mover.attach(&update_turrets,0.07); // turret mover
el14af	0:10704407da46	309	shooter.attach(&shoot,0.5); // shooter
el14af	0:10704407da46	310	// missles
el14af	0:10704407da46	311	missle_mover.attach(&update_missles,0.04); // missle mover
el14af	0:10704407da46	312	hit_checker.attach(&check_hit,0.04); // hit checker
el14af	0:10704407da46	313	// collectibles
el14af	0:10704407da46	314	collect_printer.attach(&print_collect,5.0); // collectible printer
el14af	0:10704407da46	315	collect_checker.attach(&check_collect,0.05); // collectible checker
el14af	0:10704407da46	316	collect_updater.attach(&update_collect,0.1); // collectible updater
el14af	0:10704407da46	317	collect_timer.attach(&collect_timeout,10.0); // collectible timer
el14af	0:10704407da46	318	// timer
el14af	0:10704407da46	319	timer.attach(&time_left,1.0);
el14af	0:10704407da46	320	}
el14af	0:10704407da46	321
el14af	0:10704407da46	322	// print game border
el14af	0:10704407da46	323	print_border(0,83,8,47);
el14af	0:10704407da46	324
el14af	0:10704407da46	325	// if missle hits
el14af	0:10704407da46	326	if(g_hit_flag == 1) {
el14af	0:10704407da46	327	// reset missle flags in case missle hits again
el14af	0:10704407da46	328	missle_one.hit_flag = 0;
el14af	0:10704407da46	329	missle_two.hit_flag = 0;
el14af	0:10704407da46	330	missle_three.hit_flag = 0;
el14af	0:10704407da46	331	missle_four.hit_flag = 0;
el14af	0:10704407da46	332	missle_five.hit_flag = 0;
el14af	0:10704407da46	333	missle_six.hit_flag = 0;
el14af	0:10704407da46	334
el14af	0:10704407da46	335	//take 5 seconds off the timer
el14af	0:10704407da46	336	g_time_left = g_time_left - 5;
el14af	0:10704407da46	337
el14af	0:10704407da46	338	// print new time left
el14af	0:10704407da46	339	char buffer[14];
el14af	0:10704407da46	340	int length = sprintf(buffer,"Time: %2d ",g_time_left);
el14af	0:10704407da46	341	if (length <= 14) // if string will fit on display
el14af	0:10704407da46	342	lcd.printString(buffer,16,0);
el14af	0:10704407da46	343
el14af	0:10704407da46	344	// reset flag
el14af	0:10704407da46	345	g_hit_flag = 0;
el14af	0:10704407da46	346	}
el14af	0:10704407da46	347	// if collectible is collected
el14af	0:10704407da46	348	if(g_collect_flag) {
el14af	0:10704407da46	349
el14af	0:10704407da46	350	// add 8 seconds to timer
el14af	0:10704407da46	351	g_time_left = g_time_left +8;
el14af	0:10704407da46	352
el14af	0:10704407da46	353	// print new time left
el14af	0:10704407da46	354	char buffer[14];
el14af	0:10704407da46	355	int length = sprintf(buffer,"Time: %2d ",g_time_left);
el14af	0:10704407da46	356	if (length <= 14) // if string will fit on display
el14af	0:10704407da46	357	lcd.printString(buffer,16,0);
el14af	0:10704407da46	358
el14af	0:10704407da46	359	// reset flag
el14af	0:10704407da46	360	g_collect_flag = 0;
el14af	0:10704407da46	361	}
el14af	0:10704407da46	362
el14af	0:10704407da46	363	//refresh screen
el14af	0:10704407da46	364	lcd.refresh();
el14af	0:10704407da46	365
el14af	0:10704407da46	366	// break loop if timer runs out
el14af	0:10704407da46	367	if (g_time_left < 0) {
el14af	0:10704407da46	368
el14af	0:10704407da46	369	break;
el14af	0:10704407da46	370
el14af	0:10704407da46	371	}
el14af	0:10704407da46	372	}
el14af	0:10704407da46	373	// detach all tickers
el14af	0:10704407da46	374
el14af	0:10704407da46	375	// ship
el14af	0:10704407da46	376	ship_mover.detach(); // ship mover
el14af	0:10704407da46	377	//turrets
el14af	0:10704407da46	378	turret_mover.detach(); // turret mover
el14af	0:10704407da46	379	shooter.detach(); // shooter
el14af	0:10704407da46	380	// missles
el14af	0:10704407da46	381	missle_mover.detach(); // missle mover
el14af	0:10704407da46	382	hit_checker.detach(); // hit checker
el14af	0:10704407da46	383	// collectibles
el14af	0:10704407da46	384	collect_printer.detach();// collectible printer
el14af	0:10704407da46	385	collect_checker.detach();// collectible checker
el14af	0:10704407da46	386	collect_updater.detach();// collectible updater
el14af	0:10704407da46	387	collect_timer.detach(); // collectible timer
el14af	0:10704407da46	388	// timer
el14af	0:10704407da46	389	timer.detach();
el14af	0:10704407da46	390
el14af	0:10704407da46	391	lcd.clear();
el14af	0:10704407da46	392
el14af	0:10704407da46	393	// screen border
el14af	0:10704407da46	394	print_border(0,83,0,47);
el14af	0:10704407da46	395	// smaller ornamental border
el14af	0:10704407da46	396	print_border(2,81,2,45);
el14af	0:10704407da46	397
el14af	0:10704407da46	398	// print score
el14af	0:10704407da46	399	lcd.printString("SCORE: ",23,2);
el14af	0:10704407da46	400	char buffer[14];
el14af	0:10704407da46	401	int length = sprintf(buffer," %2d ",g_score);
el14af	0:10704407da46	402	lcd.printString(buffer,23,3);
el14af	0:10704407da46	403
el14af	0:10704407da46	404	}
el14af	0:10704407da46	405
el14af	0:10704407da46	406	// ---------------------------------------------------------------------------FUNCTION PROTOTYPES-----------------------------------------------------------------------------------------
el14af	0:10704407da46	407
el14af	0:10704407da46	408	void pause_isr ()
el14af	0:10704407da46	409	{
el14af	0:10704407da46	410
el14af	0:10704407da46	411	g_pause_flag = 1;
el14af	0:10704407da46	412	}
el14af	0:10704407da46	413
el14af	0:10704407da46	414	// read default positions of the joystick to calibrate later readings
el14af	0:10704407da46	415	void calibrateJoystick()
el14af	0:10704407da46	416	{
el14af	0:10704407da46	417	//button.mode(PullDown);
el14af	0:10704407da46	418	// must not move during calibration
el14af	0:10704407da46	419	joystick.x0 = xPot; // initial positions in the range 0.0 to 1.0 (0.5 if centred exactly)
el14af	0:10704407da46	420	joystick.y0 = yPot;
el14af	0:10704407da46	421	}
el14af	0:10704407da46	422	// read and update position of the joystick
el14af	0:10704407da46	423	void updateJoystick()
el14af	0:10704407da46	424	{
el14af	0:10704407da46	425	// read current joystick values relative to calibrated values (in range -0.5 to 0.5, 0.0 is centred)
el14af	0:10704407da46	426	joystick.x = xPot - joystick.x0;
el14af	0:10704407da46	427	joystick.y = yPot - joystick.y0;
el14af	0:10704407da46	428	// read button state
el14af	0:10704407da46	429	//joystick.button = button;
el14af	0:10704407da46	430
el14af	0:10704407da46	431	// calculate direction depending on x,y values
el14af	0:10704407da46	432	// tolerance allows a little lee-way in case joystick not exactly in the stated direction
el14af	0:10704407da46	433	if ( fabs(joystick.y) < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
el14af	0:10704407da46	434	joystick.direction = CENTRE;
el14af	0:10704407da46	435	} else if ( joystick.y > DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
el14af	0:10704407da46	436	joystick.direction = UP;
el14af	0:10704407da46	437	} else if ( joystick.y < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) {
el14af	0:10704407da46	438	joystick.direction = DOWN;
el14af	0:10704407da46	439	} else if ( joystick.x > DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
el14af	0:10704407da46	440	joystick.direction = RIGHT;
el14af	0:10704407da46	441	} else if ( joystick.x < DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) {
el14af	0:10704407da46	442	joystick.direction = LEFT;
el14af	0:10704407da46	443	} else {
el14af	0:10704407da46	444	joystick.direction = UNKNOWN;
el14af	0:10704407da46	445	}
el14af	0:10704407da46	446
el14af	0:10704407da46	447	// set flag for printing
el14af	0:10704407da46	448	printFlag = 1;
el14af	0:10704407da46	449	}
el14af	0:10704407da46	450
el14af	0:10704407da46	451	// function for creating border
el14af	0:10704407da46	452	void print_border(int Xstart, int Xend, int Ystart, int Yend)
el14af	0:10704407da46	453	{
el14af	0:10704407da46	454
el14af	0:10704407da46	455	for (int i=Xstart; i<Xend+1; i++) {
el14af	0:10704407da46	456	lcd.setPixel(i,Ystart);
el14af	0:10704407da46	457	lcd.setPixel(i,Yend);
el14af	0:10704407da46	458	}
el14af	0:10704407da46	459	for (int j=Ystart; j<Yend+1; j++) {
el14af	0:10704407da46	460	lcd.setPixel(Xstart,j);
el14af	0:10704407da46	461	lcd.setPixel(Xend,j);
el14af	0:10704407da46	462	}
el14af	0:10704407da46	463	}
el14af	0:10704407da46	464
el14af	0:10704407da46	465	// setup game screen for current level
el14af	0:10704407da46	466	void setup_game()
el14af	0:10704407da46	467	{
el14af	0:10704407da46	468
el14af	0:10704407da46	469	// print ship in the middle of screen pointing up
el14af	0:10704407da46	470
el14af	0:10704407da46	471	// set up default x/y coordinate of the centre pixel of the ship, in the middle
el14af	0:10704407da46	472	// of the display, with the dwfault direction of UP. properties are defined within
el14af	0:10704407da46	473	// the Ship struct.
el14af	0:10704407da46	474	ship.x = 42;
el14af	0:10704407da46	475	ship.y = 35;
el14af	0:10704407da46	476	ship.direction = UP;
el14af	0:10704407da46	477
el14af	0:10704407da46	478	//print ship around the x/y centre coordinate
el14af	0:10704407da46	479
el14af	0:10704407da46	480	//centre
el14af	0:10704407da46	481	lcd.drawLine(ship.x,ship.y-2,ship.x,ship.y+1,1);
el14af	0:10704407da46	482	// centre left
el14af	0:10704407da46	483	lcd.drawLine(ship.x-1,ship.y-1,ship.x-1,ship.y+2,1);
el14af	0:10704407da46	484	// left engine
el14af	0:10704407da46	485	lcd.drawLine(ship.x-2,ship.y+1,ship.x-2,ship.y+2,1);
el14af	0:10704407da46	486	// centre right
el14af	0:10704407da46	487	lcd.drawLine(ship.x+1,ship.y-1,ship.x+1,ship.y+2,1);
el14af	0:10704407da46	488	// right engine
el14af	0:10704407da46	489	lcd.drawLine(ship.x+2,ship.y+1,ship.x+2,ship.y+2,1);
el14af	0:10704407da46	490
el14af	0:10704407da46	491
el14af	0:10704407da46	492	// turret setup
el14af	0:10704407da46	493	// sets the default parameters for the current level
el14af	0:10704407da46	494
el14af	0:10704407da46	495	// top turret setup
el14af	0:10704407da46	496	top_turret.position = 62;
el14af	0:10704407da46	497	top_turret.direction = LEFT;
el14af	0:10704407da46	498
el14af	0:10704407da46	499	// print turret at new position
el14af	0:10704407da46	500	lcd.drawRect(top_turret.position-2,9,4,2,1);
el14af	0:10704407da46	501	lcd.clearPixel(top_turret.position,11);
el14af	0:10704407da46	502
el14af	0:10704407da46	503
el14af	0:10704407da46	504	// bottom turret setup
el14af	0:10704407da46	505	bottom_turret.position = 21;
el14af	0:10704407da46	506	bottom_turret.direction = RIGHT;
el14af	0:10704407da46	507
el14af	0:10704407da46	508	// print turret at new position
el14af	0:10704407da46	509	lcd.drawRect(bottom_turret.position - 2,44,4,2,1);
el14af	0:10704407da46	510	lcd.clearPixel(bottom_turret.position,44);
el14af	0:10704407da46	511
el14af	0:10704407da46	512
el14af	0:10704407da46	513	// left turret setup
el14af	0:10704407da46	514	left_turret.position = 16;
el14af	0:10704407da46	515	left_turret.direction = DOWN;
el14af	0:10704407da46	516
el14af	0:10704407da46	517	// print turret at new position
el14af	0:10704407da46	518	lcd.drawRect(1,left_turret.position-2,2,4,1);
el14af	0:10704407da46	519	lcd.clearPixel(3,left_turret.position);
el14af	0:10704407da46	520
el14af	0:10704407da46	521
el14af	0:10704407da46	522
el14af	0:10704407da46	523	// right turret setup
el14af	0:10704407da46	524	right_turret.position = 31;
el14af	0:10704407da46	525	right_turret.direction = UP;
el14af	0:10704407da46	526
el14af	0:10704407da46	527	// print turret at new position
el14af	0:10704407da46	528	lcd.drawRect(80,right_turret.position-2,2,4,1);
el14af	0:10704407da46	529	lcd.clearPixel(80,right_turret.position);
el14af	0:10704407da46	530
el14af	0:10704407da46	531
el14af	0:10704407da46	532	}
el14af	0:10704407da46	533
el14af	0:10704407da46	534
el14af	0:10704407da46	535	void speed_change()
el14af	0:10704407da46	536	{
el14af	0:10704407da46	537	// increment the ship counter every time the ship moves
el14af	0:10704407da46	538	g_ship_counter ++;
el14af	0:10704407da46	539
el14af	0:10704407da46	540	// if speed button is not pressed and counter number is divisible by 3
el14af	0:10704407da46	541	if (speed_button == 0 && g_ship_counter % 3 == 0) {
el14af	0:10704407da46	542
el14af	0:10704407da46	543	update_ship();
el14af	0:10704407da46	544	}
el14af	0:10704407da46	545	// else if speed_button is pressed
el14af	0:10704407da46	546	else if (speed_button == 1) {
el14af	0:10704407da46	547
el14af	0:10704407da46	548	// update ship with every repetition
el14af	0:10704407da46	549	update_ship();
el14af	0:10704407da46	550
el14af	0:10704407da46	551	}
el14af	0:10704407da46	552	}
el14af	0:10704407da46	553
el14af	0:10704407da46	554	// update ship's position based on jostick controls
el14af	0:10704407da46	555	void update_ship ()
el14af	0:10704407da46	556	{
el14af	0:10704407da46	557
el14af	0:10704407da46	558
el14af	0:10704407da46	559	// clear ship at current position of x/y coordinates. since the ship has symetrical
el14af	0:10704407da46	560
el14af	0:10704407da46	561	lcd.drawRect(ship.x-2,ship.y-2,4,4,2);
el14af	0:10704407da46	562
el14af	0:10704407da46	563
el14af	0:10704407da46	564
el14af	0:10704407da46	565	// update ship direction variable in struct based on position of joystick
el14af	0:10704407da46	566	if (joystick.direction == UP) {
el14af	0:10704407da46	567
el14af	0:10704407da46	568	ship.direction = UP;
el14af	0:10704407da46	569	}
el14af	0:10704407da46	570	if (joystick.direction == DOWN) {
el14af	0:10704407da46	571
el14af	0:10704407da46	572	ship.direction = DOWN;
el14af	0:10704407da46	573	}
el14af	0:10704407da46	574	if (joystick.direction == RIGHT) {
el14af	0:10704407da46	575
el14af	0:10704407da46	576	ship.direction = RIGHT;
el14af	0:10704407da46	577	}
el14af	0:10704407da46	578	if (joystick.direction == LEFT) {
el14af	0:10704407da46	579
el14af	0:10704407da46	580	ship.direction = LEFT;
el14af	0:10704407da46	581	}
el14af	0:10704407da46	582	// don't update position if joystick position is unchanged, or is unknown.
el14af	0:10704407da46	583	// i.e. ship continues to fly in a straight line
el14af	0:10704407da46	584	if (joystick.direction == CENTRE \|\| joystick.direction == UNKNOWN) {
el14af	0:10704407da46	585
el14af	0:10704407da46	586	ship.direction = ship.direction;
el14af	0:10704407da46	587	}
el14af	0:10704407da46	588
el14af	0:10704407da46	589	// Print ship in new position based on the four possible directions that the ship could be traveling in
el14af	0:10704407da46	590	// i.e. UP, DOWN, LEFT or RIGHT. The manitude of the shift of the x/y centre of the ship depends on
el14af	0:10704407da46	591	// the state of the speed_button: shift by 1 pixel for standard movement and by 3 pixels for faster
el14af	0:10704407da46	592	// movement. The newly printed ship points in the direction of travel.
el14af	0:10704407da46	593
el14af	0:10704407da46	594	if (ship.direction == UP) {
el14af	0:10704407da46	595
el14af	0:10704407da46	596	// print ship 1 pixel higher
el14af	0:10704407da46	597	ship.y = ship.y - 1;
el14af	0:10704407da46	598
el14af	0:10704407da46	599	// print new ship
el14af	0:10704407da46	600
el14af	0:10704407da46	601	//centre
el14af	0:10704407da46	602	lcd.drawLine(ship.x,ship.y-2,ship.x,ship.y+1,1);
el14af	0:10704407da46	603	// centre left
el14af	0:10704407da46	604	lcd.drawLine(ship.x-1,ship.y-1,ship.x-1,ship.y+2,1);
el14af	0:10704407da46	605	// left engine
el14af	0:10704407da46	606	lcd.drawLine(ship.x-2,ship.y+1,ship.x-2,ship.y+2,1);
el14af	0:10704407da46	607	// centre right
el14af	0:10704407da46	608	lcd.drawLine(ship.x+1,ship.y-1,ship.x+1,ship.y+2,1);
el14af	0:10704407da46	609	// right engine
el14af	0:10704407da46	610	lcd.drawLine(ship.x+2,ship.y+1,ship.x+2,ship.y+2,1);
el14af	0:10704407da46	611	}
el14af	0:10704407da46	612
el14af	0:10704407da46	613	if (ship.direction == DOWN) {
el14af	0:10704407da46	614
el14af	0:10704407da46	615	// print ship 1 pixel lower
el14af	0:10704407da46	616	ship.y = ship.y + 1;
el14af	0:10704407da46	617
el14af	0:10704407da46	618	//print new ship
el14af	0:10704407da46	619
el14af	0:10704407da46	620	// centre
el14af	0:10704407da46	621	lcd.drawLine(ship.x,ship.y-1,ship.x,ship.y+2,1);
el14af	0:10704407da46	622	// centre left
el14af	0:10704407da46	623	lcd.drawLine(ship.x-1,ship.y+1,ship.x-1,ship.y-2,1);
el14af	0:10704407da46	624	// left engine
el14af	0:10704407da46	625	lcd.drawLine(ship.x-2,ship.y-1,ship.x-2,ship.y-2,1);
el14af	0:10704407da46	626	// centre right
el14af	0:10704407da46	627	lcd.drawLine(ship.x+1,ship.y+1,ship.x+1,ship.y-2,1);
el14af	0:10704407da46	628	// right engine
el14af	0:10704407da46	629	lcd.drawLine(ship.x+2,ship.y-1,ship.x+2,ship.y-2,1);
el14af	0:10704407da46	630
el14af	0:10704407da46	631	}
el14af	0:10704407da46	632
el14af	0:10704407da46	633	if (ship.direction == LEFT) {
el14af	0:10704407da46	634
el14af	0:10704407da46	635	// print ship 1 pixel to the left
el14af	0:10704407da46	636	ship.x = ship.x + 1;
el14af	0:10704407da46	637
el14af	0:10704407da46	638	//print new ship
el14af	0:10704407da46	639
el14af	0:10704407da46	640	// centre
el14af	0:10704407da46	641	lcd.drawLine(ship.x-1,ship.y,ship.x+2,ship.y,1);
el14af	0:10704407da46	642	// upper centre
el14af	0:10704407da46	643	lcd.drawLine(ship.x-2,ship.y-1,ship.x+1,ship.y-1,1);
el14af	0:10704407da46	644	// top engine
el14af	0:10704407da46	645	lcd.drawLine(ship.x-2,ship.y-2,ship.x-1,ship.y-2,1);
el14af	0:10704407da46	646	// lower centre
el14af	0:10704407da46	647	lcd.drawLine(ship.x-2,ship.y+1,ship.x+1,ship.y+1,1);
el14af	0:10704407da46	648	// bottom engine
el14af	0:10704407da46	649	lcd.drawLine(ship.x-2,ship.y+2,ship.x-1,ship.y+2,1);
el14af	0:10704407da46	650
el14af	0:10704407da46	651	}
el14af	0:10704407da46	652
el14af	0:10704407da46	653	if (ship.direction == RIGHT) {
el14af	0:10704407da46	654
el14af	0:10704407da46	655	// print ship 1 pixel right
el14af	0:10704407da46	656	ship.x = ship.x - 1;
el14af	0:10704407da46	657
el14af	0:10704407da46	658
el14af	0:10704407da46	659	//print new ship
el14af	0:10704407da46	660
el14af	0:10704407da46	661	// centre
el14af	0:10704407da46	662	lcd.drawLine(ship.x-2,ship.y,ship.x+1,ship.y,1);
el14af	0:10704407da46	663	// upper centre
el14af	0:10704407da46	664	lcd.drawLine(ship.x-1,ship.y-1,ship.x+2,ship.y-1,1);
el14af	0:10704407da46	665	// top engine
el14af	0:10704407da46	666	lcd.drawLine(ship.x+1,ship.y-2,ship.x+2,ship.y-2,1);
el14af	0:10704407da46	667	// lower centre
el14af	0:10704407da46	668	lcd.drawLine(ship.x-1,ship.y+1,ship.x+2,ship.y+1,1);
el14af	0:10704407da46	669	// bottom engine
el14af	0:10704407da46	670	lcd.drawLine(ship.x+1,ship.y+2,ship.x+2,ship.y+2,1);
el14af	0:10704407da46	671
el14af	0:10704407da46	672	}
el14af	0:10704407da46	673	// limit ship position to the game borders:
el14af	0:10704407da46	674	// X MIN
el14af	0:10704407da46	675	if (ship.x < 2) {
el14af	0:10704407da46	676	ship.x = 2;
el14af	0:10704407da46	677	}
el14af	0:10704407da46	678	// X MAX
el14af	0:10704407da46	679	if (ship.x > 81) {
el14af	0:10704407da46	680	ship.x = 81;
el14af	0:10704407da46	681	}
el14af	0:10704407da46	682	// Y MIN
el14af	0:10704407da46	683	if (ship.y < 10) {
el14af	0:10704407da46	684	ship.y = 10;
el14af	0:10704407da46	685	}
el14af	0:10704407da46	686	// Y MAX
el14af	0:10704407da46	687	if (ship.y > 45) {
el14af	0:10704407da46	688	ship.y = 45;
el14af	0:10704407da46	689	}
el14af	0:10704407da46	690	}
el14af	0:10704407da46	691
el14af	0:10704407da46	692	// update position of top turret
el14af	0:10704407da46	693	void update_turrets ()
el14af	0:10704407da46	694	{
el14af	0:10704407da46	695
el14af	0:10704407da46	696	// update top turret
el14af	0:10704407da46	697
el14af	0:10704407da46	698	// clear turret at current position
el14af	0:10704407da46	699	lcd.drawRect(top_turret.position-2,9,4,2,2);
el14af	0:10704407da46	700
el14af	0:10704407da46	701	// if the turret has reached the screen boundry, change the direction
el14af	0:10704407da46	702	if (top_turret.position == 3) {
el14af	0:10704407da46	703	top_turret.direction = RIGHT;
el14af	0:10704407da46	704	}
el14af	0:10704407da46	705	if (top_turret.position == 80) {
el14af	0:10704407da46	706	top_turret.direction = LEFT;
el14af	0:10704407da46	707	}
el14af	0:10704407da46	708
el14af	0:10704407da46	709	// shift the position of the centre pixel of the turret in the dirction of movement
el14af	0:10704407da46	710	if (top_turret.direction == LEFT) {
el14af	0:10704407da46	711	top_turret.position -- ;
el14af	0:10704407da46	712	} else if (top_turret.direction == RIGHT) {
el14af	0:10704407da46	713	top_turret.position ++ ;
el14af	0:10704407da46	714	}
el14af	0:10704407da46	715
el14af	0:10704407da46	716	// print turret at new position
el14af	0:10704407da46	717	lcd.drawRect(top_turret.position-2,9,4,2,1);
el14af	0:10704407da46	718	lcd.clearPixel(top_turret.position,11);
el14af	0:10704407da46	719
el14af	0:10704407da46	720
el14af	0:10704407da46	721
el14af	0:10704407da46	722	//update bottom turret
el14af	0:10704407da46	723
el14af	0:10704407da46	724	//clear turret at current position
el14af	0:10704407da46	725	lcd.drawRect(bottom_turret.position - 2,44,4,2,2);
el14af	0:10704407da46	726
el14af	0:10704407da46	727	// if the turret has reached the screen boundry, change the direction
el14af	0:10704407da46	728	if (bottom_turret.position == 3) {
el14af	0:10704407da46	729	bottom_turret.direction = RIGHT;
el14af	0:10704407da46	730	}
el14af	0:10704407da46	731	if (bottom_turret.position == 80) {
el14af	0:10704407da46	732	bottom_turret.direction = LEFT;
el14af	0:10704407da46	733	}
el14af	0:10704407da46	734
el14af	0:10704407da46	735	// shift the position of the centre pixel of the turret in the dirction of movement
el14af	0:10704407da46	736	if (bottom_turret.direction == LEFT) {
el14af	0:10704407da46	737	bottom_turret.position -- ;
el14af	0:10704407da46	738	} else if(bottom_turret.direction == RIGHT) {
el14af	0:10704407da46	739	bottom_turret.position ++ ;
el14af	0:10704407da46	740	}
el14af	0:10704407da46	741
el14af	0:10704407da46	742	//print turret at new position
el14af	0:10704407da46	743	lcd.drawRect(bottom_turret.position - 2,44,4,2,1);
el14af	0:10704407da46	744	lcd.clearPixel(bottom_turret.position,44);
el14af	0:10704407da46	745
el14af	0:10704407da46	746
el14af	0:10704407da46	747
el14af	0:10704407da46	748	// update left turret
el14af	0:10704407da46	749
el14af	0:10704407da46	750	// clear turret at current position
el14af	0:10704407da46	751	lcd.drawRect(1,left_turret.position-2,2,4,2);
el14af	0:10704407da46	752
el14af	0:10704407da46	753	// if the turret has reached the screen boundry, change the direction
el14af	0:10704407da46	754
el14af	0:10704407da46	755	if (left_turret.position == 10) {
el14af	0:10704407da46	756	left_turret.direction = DOWN;
el14af	0:10704407da46	757	}
el14af	0:10704407da46	758	if (left_turret.position == 44) {
el14af	0:10704407da46	759	left_turret.direction = UP;
el14af	0:10704407da46	760	}
el14af	0:10704407da46	761
el14af	0:10704407da46	762	// shift the position of the centre pixel of the turret in the dirction of movement
el14af	0:10704407da46	763	if (left_turret.direction == UP) {
el14af	0:10704407da46	764	left_turret.position -- ;
el14af	0:10704407da46	765	} else if (left_turret.direction == DOWN) {
el14af	0:10704407da46	766	left_turret.position ++ ;
el14af	0:10704407da46	767	}
el14af	0:10704407da46	768
el14af	0:10704407da46	769	// print turret at new position
el14af	0:10704407da46	770	lcd.drawRect(1,left_turret.position-2,2,4,1);
el14af	0:10704407da46	771	lcd.clearPixel(3,left_turret.position);
el14af	0:10704407da46	772
el14af	0:10704407da46	773
el14af	0:10704407da46	774
el14af	0:10704407da46	775	// update right turret
el14af	0:10704407da46	776
el14af	0:10704407da46	777	// clear turret at current position
el14af	0:10704407da46	778	lcd.drawRect(80,right_turret.position-2,2,4,2);
el14af	0:10704407da46	779
el14af	0:10704407da46	780	// if the turret has reached the screen boundry, change the direction
el14af	0:10704407da46	781
el14af	0:10704407da46	782	if (right_turret.position == 10) {
el14af	0:10704407da46	783	right_turret.direction = DOWN;
el14af	0:10704407da46	784	}
el14af	0:10704407da46	785	if (right_turret.position == 44) {
el14af	0:10704407da46	786	right_turret.direction = UP;
el14af	0:10704407da46	787	}
el14af	0:10704407da46	788
el14af	0:10704407da46	789	// shift the position of the centre pixel of the turret in the dirction of movement
el14af	0:10704407da46	790	if (right_turret.direction == UP) {
el14af	0:10704407da46	791	right_turret.position -- ;
el14af	0:10704407da46	792	} else if (right_turret.direction == DOWN) {
el14af	0:10704407da46	793	right_turret.position ++ ;
el14af	0:10704407da46	794	}
el14af	0:10704407da46	795
el14af	0:10704407da46	796	// print turret at new position
el14af	0:10704407da46	797	lcd.drawRect(80,right_turret.position-2,2,4,1);
el14af	0:10704407da46	798	lcd.clearPixel(80,right_turret.position);
el14af	0:10704407da46	799
el14af	0:10704407da46	800
el14af	0:10704407da46	801	lcd.refresh();
el14af	0:10704407da46	802
el14af	0:10704407da46	803	}
el14af	0:10704407da46	804
el14af	0:10704407da46	805	//function for firing missles
el14af	0:10704407da46	806	void shoot()
el14af	0:10704407da46	807	{
el14af	0:10704407da46	808
el14af	0:10704407da46	809	// generates a pseudo-random value between 0 and 99 for each turret.
el14af	0:10704407da46	810	srand(time(NULL));
el14af	0:10704407da46	811	int top_shoot = rand() %100+1;
el14af	0:10704407da46	812	int bottom_shoot = rand() %100+1;
el14af	0:10704407da46	813	int left_shoot = rand() %100+1;
el14af	0:10704407da46	814	int right_shoot = rand() %100+1;
el14af	0:10704407da46	815
el14af	0:10704407da46	816	// 20% chance for each turret to fire a missle. if random value is less than 20 the turret fires
el14af	0:10704407da46	817	// and the turret's shoot property is set to 1. the process is the same for each of the 4 turrets.
el14af	0:10704407da46	818	if (top_shoot < 20 ) {
el14af	0:10704407da46	819
el14af	0:10704407da46	820	//change shoot varialbe in turret struct
el14af	0:10704407da46	821	top_turret.shoot = 1;
el14af	0:10704407da46	822
el14af	0:10704407da46	823	// search for an inactive missle struct to assign the missle to. if none of the missle
el14af	0:10704407da46	824	// struct as available, i.e. there are already 6 missles on screen, the turret does not
el14af	0:10704407da46	825	// fire.
el14af	0:10704407da46	826	if (!missle_one.active) { // if missle is available
el14af	0:10704407da46	827	missle_one.active = 1; // set missle to active
el14af	0:10704407da46	828	missle_one.x = top_turret.position; // set the x-axis position of the missle equal to the turret's position
el14af	0:10704407da46	829	missle_one.y = 10; // the Y coordinate is set to 8 to account for game border and turret
el14af	0:10704407da46	830	missle_one.direction = DOWN; // set the direction the missle should travel in
el14af	0:10704407da46	831	}
el14af	0:10704407da46	832	// steps are repeated in case of other missle structs being used
el14af	0:10704407da46	833	else if (!missle_two.active) {
el14af	0:10704407da46	834	missle_two.active = 1;
el14af	0:10704407da46	835	missle_two.x = top_turret.position;
el14af	0:10704407da46	836	missle_two.y = 10;
el14af	0:10704407da46	837	missle_two.direction = DOWN;
el14af	0:10704407da46	838	} else if (!missle_three.active) {
el14af	0:10704407da46	839	missle_three.active = 1;
el14af	0:10704407da46	840	missle_three.x = top_turret.position;
el14af	0:10704407da46	841	missle_three.y = 10;
el14af	0:10704407da46	842	missle_three.direction = DOWN;
el14af	0:10704407da46	843	} else if (!missle_four.active) {
el14af	0:10704407da46	844	missle_four.active = 1;
el14af	0:10704407da46	845	missle_four.x = top_turret.position;
el14af	0:10704407da46	846	missle_four.y = 10;
el14af	0:10704407da46	847	missle_four.direction = DOWN;
el14af	0:10704407da46	848	} else if (!missle_five.active) {
el14af	0:10704407da46	849	missle_five.active = 1;
el14af	0:10704407da46	850	missle_five.x = top_turret.position;
el14af	0:10704407da46	851	missle_five.y = 10;
el14af	0:10704407da46	852	missle_five.direction = DOWN;
el14af	0:10704407da46	853	} else if (!missle_six.active) {
el14af	0:10704407da46	854	missle_six.active = 1;
el14af	0:10704407da46	855	missle_six.x = top_turret.position;
el14af	0:10704407da46	856	missle_six.y = 10;
el14af	0:10704407da46	857	missle_six.direction = DOWN;
el14af	0:10704407da46	858	} else {
el14af	0:10704407da46	859	top_turret.shoot = 0;
el14af	0:10704407da46	860	}
el14af	0:10704407da46	861
el14af	0:10704407da46	862	}
el14af	0:10704407da46	863	// whole process is identical for the other three turrets. the only changes are the direction assigned
el14af	0:10704407da46	864	// to the missle when it fires, and whether the position of the turret dictates the x or y starting
el14af	0:10704407da46	865	// position of the missle
el14af	0:10704407da46	866
el14af	0:10704407da46	867	// bottom turret
el14af	0:10704407da46	868	if (bottom_shoot < 20 ) {
el14af	0:10704407da46	869
el14af	0:10704407da46	870	bottom_turret.shoot = 1;
el14af	0:10704407da46	871
el14af	0:10704407da46	872	if (!missle_one.active) { // if missle is available
el14af	0:10704407da46	873	missle_one.active = 1; // set missle to active
el14af	0:10704407da46	874	missle_one.x = bottom_turret.position; // set the X-axis position of the missle equal to the turret's position
el14af	0:10704407da46	875	missle_one.y = 45; // the Y coordinate is set to 45 to account for game border and turret
el14af	0:10704407da46	876	missle_one.direction = UP; // set the direction the missle should travel in
el14af	0:10704407da46	877	}
el14af	0:10704407da46	878	// steps are repeated in case of other missle structs being used
el14af	0:10704407da46	879	else if (!missle_two.active) {
el14af	0:10704407da46	880	missle_two.active = 1;
el14af	0:10704407da46	881	missle_two.x = bottom_turret.position;
el14af	0:10704407da46	882	missle_two.y = 45;
el14af	0:10704407da46	883	missle_two.direction = UP;
el14af	0:10704407da46	884	} else if (!missle_three.active) {
el14af	0:10704407da46	885	missle_three.active = 1;
el14af	0:10704407da46	886	missle_three.x = bottom_turret.position;
el14af	0:10704407da46	887	missle_three.y = 45;
el14af	0:10704407da46	888	missle_three.direction = UP;
el14af	0:10704407da46	889	} else if (!missle_four.active) {
el14af	0:10704407da46	890	missle_four.active = 1;
el14af	0:10704407da46	891	missle_four.x = bottom_turret.position;
el14af	0:10704407da46	892	missle_four.y = 45;
el14af	0:10704407da46	893	missle_four.direction = UP;
el14af	0:10704407da46	894	} else if (!missle_five.active) {
el14af	0:10704407da46	895	missle_five.active = 1;
el14af	0:10704407da46	896	missle_five.x = bottom_turret.position;
el14af	0:10704407da46	897	missle_five.y = 45;
el14af	0:10704407da46	898	missle_five.direction = UP;
el14af	0:10704407da46	899	} else if (!missle_six.active) {
el14af	0:10704407da46	900	missle_six.active = 1;
el14af	0:10704407da46	901	missle_six.x = bottom_turret.position;
el14af	0:10704407da46	902	missle_six.y = 45;
el14af	0:10704407da46	903	missle_six.direction = UP;
el14af	0:10704407da46	904	} else {
el14af	0:10704407da46	905	bottom_turret.shoot = 0;
el14af	0:10704407da46	906	}
el14af	0:10704407da46	907
el14af	0:10704407da46	908	}
el14af	0:10704407da46	909	// left turret
el14af	0:10704407da46	910	if (left_shoot < 20 ) {
el14af	0:10704407da46	911
el14af	0:10704407da46	912	left_turret.shoot = 1;
el14af	0:10704407da46	913
el14af	0:10704407da46	914	if (!missle_one.active) {
el14af	0:10704407da46	915	missle_one.active = 1;
el14af	0:10704407da46	916	missle_one.x = 3; // the X coordinate is set to 3 to account for game border and turret
el14af	0:10704407da46	917	missle_two.y = left_turret.position; // set the Y-axis position of the missle equal to the turret's position
el14af	0:10704407da46	918
el14af	0:10704407da46	919	missle_one.direction = RIGHT;
el14af	0:10704407da46	920	} else if (!missle_two.active) {
el14af	0:10704407da46	921	missle_two.active = 1;
el14af	0:10704407da46	922	missle_two.x = 3;
el14af	0:10704407da46	923	missle_two.y = left_turret.position;
el14af	0:10704407da46	924	missle_two.direction = RIGHT;
el14af	0:10704407da46	925	} else if (!missle_three.active) {
el14af	0:10704407da46	926	missle_three.active = 1;
el14af	0:10704407da46	927	missle_three.x = 3;
el14af	0:10704407da46	928	missle_three.y = left_turret.position;
el14af	0:10704407da46	929	missle_three.direction = RIGHT;
el14af	0:10704407da46	930	} else if (!missle_four.active) {
el14af	0:10704407da46	931	missle_four.active = 1;
el14af	0:10704407da46	932	missle_four.x = 3;
el14af	0:10704407da46	933	missle_four.y = left_turret.position;
el14af	0:10704407da46	934	missle_four.direction = RIGHT;
el14af	0:10704407da46	935	} else if (!missle_five.active) {
el14af	0:10704407da46	936	missle_five.active = 1;
el14af	0:10704407da46	937	missle_five.x = 3;
el14af	0:10704407da46	938	missle_five.y = left_turret.position;
el14af	0:10704407da46	939	missle_five.direction = RIGHT;
el14af	0:10704407da46	940	} else if (!missle_six.active) {
el14af	0:10704407da46	941	missle_six.active = 1;
el14af	0:10704407da46	942	missle_six.x = 3;
el14af	0:10704407da46	943	missle_six.y = left_turret.position;
el14af	0:10704407da46	944	missle_six.direction = RIGHT;
el14af	0:10704407da46	945	} else {
el14af	0:10704407da46	946	left_turret.shoot = 0;
el14af	0:10704407da46	947	}
el14af	0:10704407da46	948
el14af	0:10704407da46	949	}
el14af	0:10704407da46	950	// right turret
el14af	0:10704407da46	951	if (right_shoot < 20 ) {
el14af	0:10704407da46	952
el14af	0:10704407da46	953	left_turret.shoot = 1;
el14af	0:10704407da46	954
el14af	0:10704407da46	955	if (!missle_one.active) {
el14af	0:10704407da46	956	missle_one.active = 1;
el14af	0:10704407da46	957	missle_one.x = 81; // the X coordinate is set to 81 to account for game border and turret
el14af	0:10704407da46	958	missle_one.y = right_turret.position; // set the Y-axis position of the missle equal to the turret's position
el14af	0:10704407da46	959	missle_one.direction = LEFT;
el14af	0:10704407da46	960	} else if (!missle_two.active) {
el14af	0:10704407da46	961	missle_two.active = 1;
el14af	0:10704407da46	962	missle_two.x = 81;
el14af	0:10704407da46	963	missle_two.y = right_turret.position;
el14af	0:10704407da46	964	missle_two.direction = LEFT;
el14af	0:10704407da46	965	} else if (!missle_three.active) {
el14af	0:10704407da46	966	missle_three.active = 1;
el14af	0:10704407da46	967	missle_three.x = 81;
el14af	0:10704407da46	968	missle_three.y = right_turret.position;
el14af	0:10704407da46	969	missle_three.direction = LEFT;
el14af	0:10704407da46	970	} else if (!missle_four.active) {
el14af	0:10704407da46	971	missle_four.active = 1;
el14af	0:10704407da46	972	missle_four.x = 81;
el14af	0:10704407da46	973	missle_four.y = right_turret.position;
el14af	0:10704407da46	974	missle_four.direction = LEFT;
el14af	0:10704407da46	975	} else if (!missle_five.active) {
el14af	0:10704407da46	976	missle_five.active = 1;
el14af	0:10704407da46	977	missle_five.x = 81;
el14af	0:10704407da46	978	missle_five.y = right_turret.position;
el14af	0:10704407da46	979	missle_five.direction = LEFT;
el14af	0:10704407da46	980	} else if (!missle_six.active) {
el14af	0:10704407da46	981	missle_six.active = 1;
el14af	0:10704407da46	982	missle_six.x = 81;
el14af	0:10704407da46	983	missle_six.y = right_turret.position;
el14af	0:10704407da46	984	missle_six.direction = LEFT;
el14af	0:10704407da46	985	} else {
el14af	0:10704407da46	986	right_turret.shoot = 0;
el14af	0:10704407da46	987	}
el14af	0:10704407da46	988
el14af	0:10704407da46	989	}
el14af	0:10704407da46	990
el14af	0:10704407da46	991	}
el14af	0:10704407da46	992
el14af	0:10704407da46	993	// track position of currently flying missles, update their position and detect hits.
el14af	0:10704407da46	994	void update_missles ()
el14af	0:10704407da46	995	{
el14af	0:10704407da46	996	// only preform operations if missle is active for efficiency
el14af	0:10704407da46	997	if (missle_one.active) {
el14af	0:10704407da46	998
el14af	0:10704407da46	999	//clear missle at current position
el14af	0:10704407da46	1000	// centre
el14af	0:10704407da46	1001	lcd.drawRect(missle_one.x-1,missle_one.y-1,2,2,2);
el14af	0:10704407da46	1002
el14af	0:10704407da46	1003	// set new position of missle based on direction of travel
el14af	0:10704407da46	1004	if (missle_one.direction == UP) {
el14af	0:10704407da46	1005	missle_one.y -- ;
el14af	0:10704407da46	1006	}
el14af	0:10704407da46	1007	if (missle_one.direction == DOWN) {
el14af	0:10704407da46	1008	missle_one.y ++ ;
el14af	0:10704407da46	1009	}
el14af	0:10704407da46	1010	if (missle_one.direction == LEFT) {
el14af	0:10704407da46	1011	missle_one.x -- ;
el14af	0:10704407da46	1012	}
el14af	0:10704407da46	1013	if (missle_one.direction == RIGHT) {
el14af	0:10704407da46	1014	missle_one.x ++ ;
el14af	0:10704407da46	1015	}
el14af	0:10704407da46	1016
el14af	0:10704407da46	1017	//draw missle at new position
el14af	0:10704407da46	1018	lcd.drawLine(missle_one.x - 1,missle_one.y,missle_one.x + 1,missle_one.y,1);
el14af	0:10704407da46	1019	lcd.drawLine(missle_one.x,missle_one.y - 1,missle_one.x,missle_one.y + 1,1);
el14af	0:10704407da46	1020
el14af	0:10704407da46	1021
el14af	0:10704407da46	1022	}
el14af	0:10704407da46	1023
el14af	0:10704407da46	1024	// the function then repeats process for any other active missles
el14af	0:10704407da46	1025
el14af	0:10704407da46	1026	if (missle_two.active) {
el14af	0:10704407da46	1027	//clear missle at current position
el14af	0:10704407da46	1028	lcd.drawRect(missle_two.x-1,missle_two.y-1,2,2,2);
el14af	0:10704407da46	1029
el14af	0:10704407da46	1030	// set new position of missle based on direction of travel
el14af	0:10704407da46	1031	if (missle_two.direction == UP) {
el14af	0:10704407da46	1032	missle_two.y -- ;
el14af	0:10704407da46	1033	}
el14af	0:10704407da46	1034	if (missle_two.direction == DOWN) {
el14af	0:10704407da46	1035	missle_two.y ++ ;
el14af	0:10704407da46	1036	}
el14af	0:10704407da46	1037	if (missle_two.direction == LEFT) {
el14af	0:10704407da46	1038	missle_two.x -- ;
el14af	0:10704407da46	1039	}
el14af	0:10704407da46	1040	if (missle_two.direction == RIGHT) {
el14af	0:10704407da46	1041	missle_two.x ++ ;
el14af	0:10704407da46	1042	}
el14af	0:10704407da46	1043
el14af	0:10704407da46	1044	//draw missle at new position
el14af	0:10704407da46	1045	lcd.drawLine(missle_two.x - 1,missle_two.y,missle_two.x + 1,missle_two.y,1);
el14af	0:10704407da46	1046	lcd.drawLine(missle_two.x,missle_two.y - 1,missle_two.x,missle_two.y + 1,1);
el14af	0:10704407da46	1047
el14af	0:10704407da46	1048
el14af	0:10704407da46	1049	}
el14af	0:10704407da46	1050	if (missle_three.active) {
el14af	0:10704407da46	1051	//clear missle at current position
el14af	0:10704407da46	1052	lcd.drawRect(missle_three.x-1,missle_three.y-1,2,2,2);
el14af	0:10704407da46	1053
el14af	0:10704407da46	1054	// set new position of missle based on direction of travel
el14af	0:10704407da46	1055	if (missle_three.direction == UP) {
el14af	0:10704407da46	1056	missle_three.y -- ;
el14af	0:10704407da46	1057	}
el14af	0:10704407da46	1058	if (missle_three.direction == DOWN) {
el14af	0:10704407da46	1059	missle_three.y ++ ;
el14af	0:10704407da46	1060	}
el14af	0:10704407da46	1061	if (missle_three.direction == LEFT) {
el14af	0:10704407da46	1062	missle_three.x -- ;
el14af	0:10704407da46	1063	}
el14af	0:10704407da46	1064	if (missle_three.direction == RIGHT) {
el14af	0:10704407da46	1065	missle_three.x ++ ;
el14af	0:10704407da46	1066	}
el14af	0:10704407da46	1067
el14af	0:10704407da46	1068	//draw missle at new position
el14af	0:10704407da46	1069	lcd.drawLine(missle_three.x - 1,missle_three.y,missle_three.x + 1,missle_three.y,1);
el14af	0:10704407da46	1070	lcd.drawLine(missle_three.x,missle_three.y - 1,missle_three.x,missle_three.y + 1,1);
el14af	0:10704407da46	1071
el14af	0:10704407da46	1072	}
el14af	0:10704407da46	1073	if (missle_four.active) {
el14af	0:10704407da46	1074	//clear missle at current position
el14af	0:10704407da46	1075	lcd.drawRect(missle_four.x-1,missle_four.y-1,2,2,2);
el14af	0:10704407da46	1076
el14af	0:10704407da46	1077	// set new position of missle based on direction of travel
el14af	0:10704407da46	1078	if (missle_four.direction == UP) {
el14af	0:10704407da46	1079	missle_four.y -- ;
el14af	0:10704407da46	1080	}
el14af	0:10704407da46	1081	if (missle_four.direction == DOWN) {
el14af	0:10704407da46	1082	missle_four.y ++ ;
el14af	0:10704407da46	1083	}
el14af	0:10704407da46	1084	if (missle_four.direction == LEFT) {
el14af	0:10704407da46	1085	missle_four.x -- ;
el14af	0:10704407da46	1086	}
el14af	0:10704407da46	1087	if (missle_four.direction == RIGHT) {
el14af	0:10704407da46	1088	missle_four.x ++ ;
el14af	0:10704407da46	1089	}
el14af	0:10704407da46	1090
el14af	0:10704407da46	1091	//draw missle at new position
el14af	0:10704407da46	1092	lcd.drawLine(missle_four.x - 1,missle_four.y,missle_four.x + 1,missle_four.y,1);
el14af	0:10704407da46	1093	lcd.drawLine(missle_four.x,missle_four.y - 1,missle_four.x,missle_four.y + 1,1);
el14af	0:10704407da46	1094
el14af	0:10704407da46	1095	}
el14af	0:10704407da46	1096	if (missle_five.active) {
el14af	0:10704407da46	1097	//clear missle at current position
el14af	0:10704407da46	1098	lcd.drawRect(missle_five.x-1,missle_five.y-1,2,2,2);
el14af	0:10704407da46	1099
el14af	0:10704407da46	1100	// set new position of missle based on direction of travel
el14af	0:10704407da46	1101	if (missle_five.direction == UP) {
el14af	0:10704407da46	1102	missle_five.y -- ;
el14af	0:10704407da46	1103	}
el14af	0:10704407da46	1104	if (missle_five.direction == DOWN) {
el14af	0:10704407da46	1105	missle_five.y ++ ;
el14af	0:10704407da46	1106	}
el14af	0:10704407da46	1107	if (missle_five.direction == LEFT) {
el14af	0:10704407da46	1108	missle_five.x -- ;
el14af	0:10704407da46	1109	}
el14af	0:10704407da46	1110	if (missle_five.direction == RIGHT) {
el14af	0:10704407da46	1111	missle_five.x ++ ;
el14af	0:10704407da46	1112	}
el14af	0:10704407da46	1113
el14af	0:10704407da46	1114	//draw missle at new position
el14af	0:10704407da46	1115	lcd.drawLine(missle_five.x - 1,missle_five.y,missle_five.x + 1,missle_five.y,1);
el14af	0:10704407da46	1116	lcd.drawLine(missle_five.x,missle_five.y - 1,missle_five.x,missle_five.y + 1,1);
el14af	0:10704407da46	1117
el14af	0:10704407da46	1118
el14af	0:10704407da46	1119	}
el14af	0:10704407da46	1120	if (missle_six.active) {
el14af	0:10704407da46	1121	//clear missle at current position
el14af	0:10704407da46	1122	lcd.drawRect(missle_six.x-1,missle_six.y-1,2,2,2);
el14af	0:10704407da46	1123
el14af	0:10704407da46	1124	// set new position of missle based on direction of travel
el14af	0:10704407da46	1125	if (missle_six.direction == UP) {
el14af	0:10704407da46	1126	missle_six.y -- ;
el14af	0:10704407da46	1127	}
el14af	0:10704407da46	1128	if (missle_six.direction == DOWN) {
el14af	0:10704407da46	1129	missle_six.y ++ ;
el14af	0:10704407da46	1130	}
el14af	0:10704407da46	1131	if (missle_six.direction == LEFT) {
el14af	0:10704407da46	1132	missle_six.x -- ;
el14af	0:10704407da46	1133	}
el14af	0:10704407da46	1134	if (missle_six.direction == RIGHT) {
el14af	0:10704407da46	1135	missle_six.x ++ ;
el14af	0:10704407da46	1136	}
el14af	0:10704407da46	1137
el14af	0:10704407da46	1138	//draw missle at new position
el14af	0:10704407da46	1139	lcd.drawLine(missle_six.x - 1,missle_six.y,missle_six.x + 1,missle_six.y,1);
el14af	0:10704407da46	1140	lcd.drawLine(missle_six.x,missle_six.y - 1,missle_six.x,missle_six.y + 1,1);
el14af	0:10704407da46	1141
el14af	0:10704407da46	1142
el14af	0:10704407da46	1143
el14af	0:10704407da46	1144	}
el14af	0:10704407da46	1145	}
el14af	0:10704407da46	1146
el14af	0:10704407da46	1147	// detect hits missle expires
el14af	0:10704407da46	1148	void check_hit ()
el14af	0:10704407da46	1149	{
el14af	0:10704407da46	1150	// only preform operations if missle is active for efficiency
el14af	0:10704407da46	1151	if (missle_one.active) {
el14af	0:10704407da46	1152
el14af	0:10704407da46	1153
el14af	0:10704407da46	1154	if (ship.direction == UP) {
el14af	0:10704407da46	1155	// check if the missle is within the x_axis constraints of the hit box
el14af	0:10704407da46	1156	// the structure : if missle x coordinate is greater than the top right pixel of hit box...
el14af	0:10704407da46	1157	// AND
el14af	0:10704407da46	1158	// missle x coordinate is less than top right pixel of hit box + width of the hit box...
el14af	0:10704407da46	1159	// then the missle is in the x constraints.
el14af	0:10704407da46	1160	if ( (missle_one.x > ship.x - 2 ) && (missle_one.x < ship.x + 2) ) {
el14af	0:10704407da46	1161	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1162	if ( (missle_one.y > ship.y - 2 ) && (missle_one.y < ship.y + 3) ) {
el14af	0:10704407da46	1163	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1164	missle_one.active = 0;
el14af	0:10704407da46	1165	// set hit flag for missle 1.
el14af	0:10704407da46	1166	missle_one.hit_flag = 1;
el14af	0:10704407da46	1167	//clear missle
el14af	0:10704407da46	1168	lcd.drawRect(missle_one.x-1,missle_one.y-1,2,2,2);
el14af	0:10704407da46	1169	}
el14af	0:10704407da46	1170	}
el14af	0:10704407da46	1171	}
el14af	0:10704407da46	1172	// the process is repeated for the different directions of travel, with a different hitbox shape:
el14af	0:10704407da46	1173	// down
el14af	0:10704407da46	1174	if (ship.direction == DOWN) {
el14af	0:10704407da46	1175	if ( (missle_one.x > ship.x - 2 ) && (missle_one.x < ship.x + 2 ) ) {
el14af	0:10704407da46	1176	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1177	if ( (missle_one.y > ship.y - 3 ) && (missle_one.y < ship.y + 2) ) {
el14af	0:10704407da46	1178	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1179	missle_one.active = 0;
el14af	0:10704407da46	1180	// set hit flag for missle 1.
el14af	0:10704407da46	1181	missle_one.hit_flag = 1;
el14af	0:10704407da46	1182	//clear missle
el14af	0:10704407da46	1183	lcd.drawRect(missle_one.x-1,missle_one.y-1,2,2,2);
el14af	0:10704407da46	1184	}
el14af	0:10704407da46	1185	}
el14af	0:10704407da46	1186	}
el14af	0:10704407da46	1187	// left
el14af	0:10704407da46	1188	if (ship.direction == LEFT) {
el14af	0:10704407da46	1189	if ( (missle_one.x > ship.x - 3 ) && (missle_one.x < ship.x + 2) ) {
el14af	0:10704407da46	1190	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1191	if ( (missle_one.y > ship.y - 2 ) && (missle_one.y < ship.y + 2) ) {
el14af	0:10704407da46	1192	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1193	missle_one.active = 0;
el14af	0:10704407da46	1194	// set hit flag for missle 1.
el14af	0:10704407da46	1195	missle_one.hit_flag = 1;
el14af	0:10704407da46	1196	//clear missle
el14af	0:10704407da46	1197	lcd.drawRect(missle_one.x-1,missle_one.y-1,2,2,2);
el14af	0:10704407da46	1198	}
el14af	0:10704407da46	1199	}
el14af	0:10704407da46	1200	}
el14af	0:10704407da46	1201	// right
el14af	0:10704407da46	1202	if (ship.direction == RIGHT) {
el14af	0:10704407da46	1203	if ( (missle_one.x > ship.x - 2 ) && (missle_one.x < ship.x + 3) ) {
el14af	0:10704407da46	1204	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1205	if ( (missle_one.y > ship.y - 2 ) && (missle_one.y < ship.y + 2) ) {
el14af	0:10704407da46	1206	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1207	missle_one.active = 0;
el14af	0:10704407da46	1208	// set hit flag for missle 1.
el14af	0:10704407da46	1209	missle_one.hit_flag = 1;
el14af	0:10704407da46	1210	//clear missle
el14af	0:10704407da46	1211	lcd.drawRect(missle_one.x-1,missle_one.y-1,2,2,2);
el14af	0:10704407da46	1212	}
el14af	0:10704407da46	1213	}
el14af	0:10704407da46	1214	}
el14af	0:10704407da46	1215
el14af	0:10704407da46	1216	// detect missle expires
el14af	0:10704407da46	1217	// depending on the direction of flight, if the missle reaches the border without coming in contact with the ship.
el14af	0:10704407da46	1218	// the missle is set to inactive
el14af	0:10704407da46	1219
el14af	0:10704407da46	1220	if (missle_one.direction == UP) {
el14af	0:10704407da46	1221	if (missle_one.y == 10) {
el14af	0:10704407da46	1222	missle_one.active = 0;
el14af	0:10704407da46	1223
el14af	0:10704407da46	1224	//clear missle
el14af	0:10704407da46	1225	lcd.drawRect(missle_one.x-1,missle_one.y-1,2,2,2);
el14af	0:10704407da46	1226	}
el14af	0:10704407da46	1227
el14af	0:10704407da46	1228	}
el14af	0:10704407da46	1229	if (missle_one.direction == DOWN) {
el14af	0:10704407da46	1230	if (missle_one.y == 45) {
el14af	0:10704407da46	1231	missle_one.active = 0;
el14af	0:10704407da46	1232
el14af	0:10704407da46	1233	//clear missle
el14af	0:10704407da46	1234	lcd.drawRect(missle_one.x-1,missle_one.y-1,2,2,2);
el14af	0:10704407da46	1235	}
el14af	0:10704407da46	1236
el14af	0:10704407da46	1237	}
el14af	0:10704407da46	1238	if (missle_one.direction == LEFT) {
el14af	0:10704407da46	1239	if (missle_one.x == 2 ) {
el14af	0:10704407da46	1240	missle_one.active = 0;
el14af	0:10704407da46	1241
el14af	0:10704407da46	1242	//clear missle
el14af	0:10704407da46	1243	lcd.drawRect(missle_one.x-1,missle_one.y-1,2,2,2);
el14af	0:10704407da46	1244	}
el14af	0:10704407da46	1245
el14af	0:10704407da46	1246	}
el14af	0:10704407da46	1247	if (missle_one.direction == RIGHT) {
el14af	0:10704407da46	1248	if (missle_one.x == 80 ) {
el14af	0:10704407da46	1249	missle_one.active = 0;
el14af	0:10704407da46	1250
el14af	0:10704407da46	1251	//clear missle
el14af	0:10704407da46	1252	lcd.drawRect(missle_one.x-1,missle_one.y-1,2,2,2);
el14af	0:10704407da46	1253	}
el14af	0:10704407da46	1254
el14af	0:10704407da46	1255	}
el14af	0:10704407da46	1256	}
el14af	0:10704407da46	1257	// only preform operations if missle is active for efficiency
el14af	0:10704407da46	1258	if (missle_two.active) {
el14af	0:10704407da46	1259	if (ship.direction == UP) {
el14af	0:10704407da46	1260	//check if the ship is within the x_axis constraints of the hit box
el14af	0:10704407da46	1261	// the structure : if missle x coordinate is greater than the top right pixel of hit box...
el14af	0:10704407da46	1262	// AND
el14af	0:10704407da46	1263	// missle x coordinate is less than top right pixel of hit box + width of the hit box...
el14af	0:10704407da46	1264	// then the missle is in the x constraints.
el14af	0:10704407da46	1265	if ( (missle_two.x > ship.x - 2 ) && (missle_two.x < ship.x + 2) ) {
el14af	0:10704407da46	1266	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1267	if ( (missle_two.y > ship.y - 2 ) && (missle_two.y < ship.y + 3) ) {
el14af	0:10704407da46	1268	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1269	missle_two.active = 0;
el14af	0:10704407da46	1270	// set hit flag for missle 1.
el14af	0:10704407da46	1271	missle_two.hit_flag = 1;
el14af	0:10704407da46	1272	//clear missle
el14af	0:10704407da46	1273	lcd.drawRect(missle_two.x-1,missle_two.y-1,2,2,2);
el14af	0:10704407da46	1274	}
el14af	0:10704407da46	1275	}
el14af	0:10704407da46	1276	}
el14af	0:10704407da46	1277	// the process is repeated for the different directions of travel, with a different hitbox shape
el14af	0:10704407da46	1278	if (ship.direction == DOWN) {
el14af	0:10704407da46	1279	if ( (missle_two.x > ship.x - 2 ) && (missle_two.x < ship.x + 2 ) ) {
el14af	0:10704407da46	1280	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1281	if ( (missle_two.y > ship.y - 3 ) && (missle_two.y < ship.y + 2) ) {
el14af	0:10704407da46	1282	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1283	missle_two.active = 0;
el14af	0:10704407da46	1284	// set hit flag for missle 1.
el14af	0:10704407da46	1285	missle_two.hit_flag = 1;
el14af	0:10704407da46	1286	//clear missle
el14af	0:10704407da46	1287	lcd.drawRect(missle_two.x-1,missle_two.y-1,2,2,2);
el14af	0:10704407da46	1288	}
el14af	0:10704407da46	1289	}
el14af	0:10704407da46	1290	}
el14af	0:10704407da46	1291	if (ship.direction == LEFT) {
el14af	0:10704407da46	1292	if ( (missle_two.x > ship.x - 2 ) && (missle_two.x < ship.x + 3) ) {
el14af	0:10704407da46	1293	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1294	if ( (missle_two.y > ship.y - 2 ) && (missle_two.y < ship.y + 2) ) {
el14af	0:10704407da46	1295	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1296	missle_two.active = 0;
el14af	0:10704407da46	1297	// set hit flag for missle 1.
el14af	0:10704407da46	1298	missle_two.hit_flag = 1;
el14af	0:10704407da46	1299	//clear missle
el14af	0:10704407da46	1300	lcd.drawRect(missle_two.x-1,missle_two.y-1,2,2,2);
el14af	0:10704407da46	1301	}
el14af	0:10704407da46	1302	}
el14af	0:10704407da46	1303	}
el14af	0:10704407da46	1304	if (ship.direction == RIGHT) {
el14af	0:10704407da46	1305	if ( (missle_two.x > ship.x - 3 ) && (missle_two.x < ship.x + 2) ) {
el14af	0:10704407da46	1306	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1307	if ( (missle_two.y > ship.y - 2 ) && (missle_two.y < ship.y + 2) ) {
el14af	0:10704407da46	1308	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1309	missle_two.active = 0;
el14af	0:10704407da46	1310	// set hit flag for missle 1.
el14af	0:10704407da46	1311	missle_two.hit_flag = 1;
el14af	0:10704407da46	1312	//clear missle
el14af	0:10704407da46	1313	lcd.drawRect(missle_two.x-1,missle_two.y-1,2,2,2);
el14af	0:10704407da46	1314	}
el14af	0:10704407da46	1315	}
el14af	0:10704407da46	1316	}
el14af	0:10704407da46	1317
el14af	0:10704407da46	1318	// detect missle expires
el14af	0:10704407da46	1319	// depending on the direction of flight, if the missle reaches the border without coming in contact with the ship.
el14af	0:10704407da46	1320	// the missle is set to inactive
el14af	0:10704407da46	1321
el14af	0:10704407da46	1322	if (missle_two.direction == UP) {
el14af	0:10704407da46	1323	if (missle_two.y == 10) {
el14af	0:10704407da46	1324	missle_two.active = 0;
el14af	0:10704407da46	1325
el14af	0:10704407da46	1326	//clear missle
el14af	0:10704407da46	1327	lcd.drawRect(missle_two.x-1,missle_two.y-1,2,2,2);
el14af	0:10704407da46	1328	}
el14af	0:10704407da46	1329
el14af	0:10704407da46	1330	}
el14af	0:10704407da46	1331	if (missle_two.direction == DOWN) {
el14af	0:10704407da46	1332	if (missle_two.y == 44) {
el14af	0:10704407da46	1333	missle_two.active = 0;
el14af	0:10704407da46	1334
el14af	0:10704407da46	1335	//clear missle
el14af	0:10704407da46	1336	lcd.drawRect(missle_two.x-1,missle_two.y-1,2,2,2);
el14af	0:10704407da46	1337	}
el14af	0:10704407da46	1338
el14af	0:10704407da46	1339	}
el14af	0:10704407da46	1340	if (missle_two.direction == LEFT) {
el14af	0:10704407da46	1341	if (missle_two.x == 2 ) {
el14af	0:10704407da46	1342	missle_two.active = 0;
el14af	0:10704407da46	1343
el14af	0:10704407da46	1344	//clear missle
el14af	0:10704407da46	1345	lcd.drawRect(missle_two.x-1,missle_two.y-1,2,2,2);
el14af	0:10704407da46	1346	}
el14af	0:10704407da46	1347
el14af	0:10704407da46	1348	}
el14af	0:10704407da46	1349	if (missle_two.direction == RIGHT) {
el14af	0:10704407da46	1350	if (missle_two.x == 80 ) {
el14af	0:10704407da46	1351	missle_two.active = 0;
el14af	0:10704407da46	1352
el14af	0:10704407da46	1353	//clear missle
el14af	0:10704407da46	1354	lcd.drawRect(missle_two.x-1,missle_two.y-1,2,2,2);
el14af	0:10704407da46	1355	}
el14af	0:10704407da46	1356
el14af	0:10704407da46	1357	}
el14af	0:10704407da46	1358	}
el14af	0:10704407da46	1359	// only preform operations if missle is active for efficiency
el14af	0:10704407da46	1360	if (missle_three.active) {
el14af	0:10704407da46	1361
el14af	0:10704407da46	1362	if (ship.direction == UP) {
el14af	0:10704407da46	1363	//check if the ship is within the x_axis constraints of the hit box
el14af	0:10704407da46	1364	// the structure : if missle x coordinate is greater than the top right pixel of hit box...
el14af	0:10704407da46	1365	// AND
el14af	0:10704407da46	1366	// missle x coordinate is less than top right pixel of hit box + width of the hit box...
el14af	0:10704407da46	1367	// then the missle is in the x constraints.
el14af	0:10704407da46	1368	if ( (missle_three.x > ship.x - 2 ) && (missle_three.x < ship.x + 2) ) {
el14af	0:10704407da46	1369	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1370	if ( (missle_three.y > ship.y - 2 ) && (missle_three.y < ship.y + 3) ) {
el14af	0:10704407da46	1371	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1372	missle_three.active = 0;
el14af	0:10704407da46	1373	// set hit flag for missle 1.
el14af	0:10704407da46	1374	missle_three.hit_flag = 1;
el14af	0:10704407da46	1375	//clear missle
el14af	0:10704407da46	1376	lcd.drawRect(missle_three.x-1,missle_three.y-1,2,2,2);
el14af	0:10704407da46	1377	}
el14af	0:10704407da46	1378	}
el14af	0:10704407da46	1379	}
el14af	0:10704407da46	1380	// the process is repeated for the different directions of travel, with a different hitbox shape
el14af	0:10704407da46	1381	if (ship.direction == DOWN) {
el14af	0:10704407da46	1382	if ( (missle_three.x > ship.x - 2 ) && (missle_three.x < ship.x + 2 ) ) {
el14af	0:10704407da46	1383	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1384	if ( (missle_three.y > ship.y - 3 ) && (missle_three.y < ship.y + 2) ) {
el14af	0:10704407da46	1385	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1386	missle_three.active = 0;
el14af	0:10704407da46	1387	// set hit flag for missle 1.
el14af	0:10704407da46	1388	missle_three.hit_flag = 1;
el14af	0:10704407da46	1389	//clear missle
el14af	0:10704407da46	1390	lcd.drawRect(missle_three.x-1,missle_three.y-1,2,2,2);
el14af	0:10704407da46	1391	}
el14af	0:10704407da46	1392	}
el14af	0:10704407da46	1393	}
el14af	0:10704407da46	1394	if (ship.direction == LEFT) {
el14af	0:10704407da46	1395	if ( (missle_three.x > ship.x - 2 ) && (missle_three.x < ship.x + 3) ) {
el14af	0:10704407da46	1396	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1397	if ( (missle_three.y > ship.y - 2 ) && (missle_three.y < ship.y + 2) ) {
el14af	0:10704407da46	1398	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1399	missle_three.active = 0;
el14af	0:10704407da46	1400	// set hit flag for missle 1.
el14af	0:10704407da46	1401	missle_three.hit_flag = 1;
el14af	0:10704407da46	1402	//clear missle
el14af	0:10704407da46	1403	lcd.drawRect(missle_three.x-1,missle_three.y-1,2,2,2);
el14af	0:10704407da46	1404	}
el14af	0:10704407da46	1405	}
el14af	0:10704407da46	1406	}
el14af	0:10704407da46	1407	if (ship.direction == RIGHT) {
el14af	0:10704407da46	1408	if ( (missle_three.x > ship.x - 3 ) && (missle_three.x < ship.x + 2) ) {
el14af	0:10704407da46	1409	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1410	if ( (missle_three.y > ship.y - 2) && (missle_three.y < ship.y + 2) ) {
el14af	0:10704407da46	1411	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1412	missle_three.active = 0;
el14af	0:10704407da46	1413	// set hit flag for missle 1.
el14af	0:10704407da46	1414	missle_three.hit_flag = 1;
el14af	0:10704407da46	1415	//clear missle
el14af	0:10704407da46	1416	lcd.drawRect(missle_three.x-1,missle_three.y-1,2,2,2);
el14af	0:10704407da46	1417	}
el14af	0:10704407da46	1418	}
el14af	0:10704407da46	1419	}
el14af	0:10704407da46	1420
el14af	0:10704407da46	1421	// detect missle expires
el14af	0:10704407da46	1422	// depending on the direction of flight, if the missle reaches the border without coming in contact with the ship.
el14af	0:10704407da46	1423	// the missle is set to inactive
el14af	0:10704407da46	1424
el14af	0:10704407da46	1425	if (missle_three.direction == UP) {
el14af	0:10704407da46	1426	if (missle_three.y == 10) {
el14af	0:10704407da46	1427	missle_three.active = 0;
el14af	0:10704407da46	1428
el14af	0:10704407da46	1429	//clear missle
el14af	0:10704407da46	1430	lcd.drawRect(missle_three.x-1,missle_three.y-1,2,2,2);
el14af	0:10704407da46	1431	}
el14af	0:10704407da46	1432
el14af	0:10704407da46	1433	}
el14af	0:10704407da46	1434	if (missle_three.direction == DOWN) {
el14af	0:10704407da46	1435	if (missle_three.y == 44) {
el14af	0:10704407da46	1436	missle_three.active = 0;
el14af	0:10704407da46	1437
el14af	0:10704407da46	1438	//clear missle
el14af	0:10704407da46	1439	lcd.drawRect(missle_three.x-1,missle_three.y-1,2,2,2);
el14af	0:10704407da46	1440	}
el14af	0:10704407da46	1441
el14af	0:10704407da46	1442	}
el14af	0:10704407da46	1443	if (missle_three.direction == LEFT) {
el14af	0:10704407da46	1444	if (missle_three.x == 2 ) {
el14af	0:10704407da46	1445	missle_three.active = 0;
el14af	0:10704407da46	1446
el14af	0:10704407da46	1447	//clear missle
el14af	0:10704407da46	1448	lcd.drawRect(missle_three.x-1,missle_three.y-1,2,2,2);
el14af	0:10704407da46	1449	}
el14af	0:10704407da46	1450
el14af	0:10704407da46	1451	}
el14af	0:10704407da46	1452	if (missle_three.direction == RIGHT) {
el14af	0:10704407da46	1453	if (missle_three.x == 80 ) {
el14af	0:10704407da46	1454	missle_three.active = 0;
el14af	0:10704407da46	1455
el14af	0:10704407da46	1456	//clear missle
el14af	0:10704407da46	1457	lcd.drawRect(missle_three.x-1,missle_three.y-1,2,2,2);
el14af	0:10704407da46	1458	}
el14af	0:10704407da46	1459
el14af	0:10704407da46	1460	}
el14af	0:10704407da46	1461
el14af	0:10704407da46	1462	}
el14af	0:10704407da46	1463	// only preform operations if missle is active for efficiency
el14af	0:10704407da46	1464	if (missle_four.active) {
el14af	0:10704407da46	1465	if (ship.direction == UP) {
el14af	0:10704407da46	1466	//check if the ship is within the x_axis constraints of the hit box
el14af	0:10704407da46	1467	// the structure : if missle x coordinate is greater than the top right pixel of hit box...
el14af	0:10704407da46	1468	// AND
el14af	0:10704407da46	1469	// missle x coordinate is less than top right pixel of hit box + width of the hit box...
el14af	0:10704407da46	1470	// then the missle is in the x constraints.
el14af	0:10704407da46	1471	if ( (missle_four.x > ship.x - 2 ) && (missle_four.x < ship.x + 2) ) {
el14af	0:10704407da46	1472	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1473	if ( (missle_four.y > ship.y - 2 ) && (missle_four.y < ship.y + 3) ) {
el14af	0:10704407da46	1474	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1475	missle_four.active = 0;
el14af	0:10704407da46	1476	// set hit flag for missle 1.
el14af	0:10704407da46	1477	missle_four.hit_flag = 1;
el14af	0:10704407da46	1478	//clear missle
el14af	0:10704407da46	1479	lcd.drawRect(missle_four.x-1,missle_four.y-1,2,2,2);
el14af	0:10704407da46	1480	}
el14af	0:10704407da46	1481	}
el14af	0:10704407da46	1482	}
el14af	0:10704407da46	1483	// the process is repeated for the different directions of travel, with a different hitbox shape
el14af	0:10704407da46	1484	if (ship.direction == DOWN) {
el14af	0:10704407da46	1485	if ( (missle_four.x > ship.x - 2 ) && (missle_four.x < ship.x + 2 ) ) {
el14af	0:10704407da46	1486	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1487	if ( (missle_four.y > ship.y - 3 ) && (missle_four.y < ship.y + 2) ) {
el14af	0:10704407da46	1488	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1489	missle_four.active = 0;
el14af	0:10704407da46	1490	// set hit flag for missle 1.
el14af	0:10704407da46	1491	missle_four.hit_flag = 1;
el14af	0:10704407da46	1492	//clear missle
el14af	0:10704407da46	1493	lcd.drawRect(missle_four.x-1,missle_four.y-1,2,2,2);
el14af	0:10704407da46	1494	}
el14af	0:10704407da46	1495	}
el14af	0:10704407da46	1496	}
el14af	0:10704407da46	1497	if (ship.direction == LEFT) {
el14af	0:10704407da46	1498	if ( (missle_four.x > ship.x - 2 ) && (missle_four.x < ship.x + 3) ) {
el14af	0:10704407da46	1499	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1500	if ( (missle_four.y > ship.y - 2) && (missle_four.y < ship.y + 2) ) {
el14af	0:10704407da46	1501	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1502	missle_four.active = 0;
el14af	0:10704407da46	1503	// set hit flag for missle 1.
el14af	0:10704407da46	1504	missle_four.hit_flag = 1;
el14af	0:10704407da46	1505	//clear missle
el14af	0:10704407da46	1506	lcd.drawRect(missle_four.x-1,missle_four.y-1,2,2,2);
el14af	0:10704407da46	1507	}
el14af	0:10704407da46	1508	}
el14af	0:10704407da46	1509	}
el14af	0:10704407da46	1510	if (ship.direction == RIGHT) {
el14af	0:10704407da46	1511	if ( (missle_four.x > ship.x - 3 ) && (missle_four.x < ship.x + 2) ) {
el14af	0:10704407da46	1512	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1513	if ( (missle_four.y > ship.y - 2 ) && (missle_four.y < ship.y + 2) ) {
el14af	0:10704407da46	1514	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1515	missle_four.active = 0;
el14af	0:10704407da46	1516	// set hit flag for missle 1.
el14af	0:10704407da46	1517	missle_four.hit_flag = 1;
el14af	0:10704407da46	1518	//clear missle
el14af	0:10704407da46	1519	lcd.drawRect(missle_four.x-1,missle_four.y-1,2,2,2);
el14af	0:10704407da46	1520	}
el14af	0:10704407da46	1521	}
el14af	0:10704407da46	1522	}
el14af	0:10704407da46	1523
el14af	0:10704407da46	1524	// detect missle expires
el14af	0:10704407da46	1525	// depending on the direction of flight, if the missle reaches the border without coming in contact with the ship.
el14af	0:10704407da46	1526	// the missle is set to inactive
el14af	0:10704407da46	1527
el14af	0:10704407da46	1528	if (missle_four.direction == UP) {
el14af	0:10704407da46	1529	if (missle_four.y == 10) {
el14af	0:10704407da46	1530	missle_four.active = 0;
el14af	0:10704407da46	1531
el14af	0:10704407da46	1532	//clear missle
el14af	0:10704407da46	1533	lcd.drawRect(missle_four.x-1,missle_four.y-1,2,2,2);
el14af	0:10704407da46	1534	}
el14af	0:10704407da46	1535
el14af	0:10704407da46	1536	}
el14af	0:10704407da46	1537	if (missle_four.direction == DOWN) {
el14af	0:10704407da46	1538	if (missle_four.y == 44) {
el14af	0:10704407da46	1539	missle_four.active = 0;
el14af	0:10704407da46	1540
el14af	0:10704407da46	1541	//clear missle
el14af	0:10704407da46	1542	lcd.drawRect(missle_four.x-1,missle_four.y-1,2,2,2);
el14af	0:10704407da46	1543	}
el14af	0:10704407da46	1544
el14af	0:10704407da46	1545	}
el14af	0:10704407da46	1546	if (missle_four.direction == LEFT) {
el14af	0:10704407da46	1547	if (missle_four.x == 2 ) {
el14af	0:10704407da46	1548	missle_four.active = 0;
el14af	0:10704407da46	1549
el14af	0:10704407da46	1550	//clear missle
el14af	0:10704407da46	1551	lcd.drawRect(missle_four.x-1,missle_four.y-1,2,2,2);
el14af	0:10704407da46	1552	}
el14af	0:10704407da46	1553
el14af	0:10704407da46	1554	}
el14af	0:10704407da46	1555	if (missle_four.direction == RIGHT) {
el14af	0:10704407da46	1556	if (missle_four.x == 80 ) {
el14af	0:10704407da46	1557	missle_four.active = 0;
el14af	0:10704407da46	1558
el14af	0:10704407da46	1559	//clear missle
el14af	0:10704407da46	1560	lcd.drawRect(missle_four.x-1,missle_four.y-1,2,2,2);
el14af	0:10704407da46	1561	}
el14af	0:10704407da46	1562
el14af	0:10704407da46	1563	}
el14af	0:10704407da46	1564	}
el14af	0:10704407da46	1565	// only preform operations if missle is active for efficiency
el14af	0:10704407da46	1566	if (missle_five.active) {
el14af	0:10704407da46	1567	if (ship.direction == UP) {
el14af	0:10704407da46	1568	//check if the ship is within the x_axis constraints of the hit box
el14af	0:10704407da46	1569	// the structure : if missle x coordinate is greater than the top right pixel of hit box...
el14af	0:10704407da46	1570	// AND
el14af	0:10704407da46	1571	// missle x coordinate is less than top right pixel of hit box + width of the hit box...
el14af	0:10704407da46	1572	// then the missle is in the x constraints.
el14af	0:10704407da46	1573	if ( (missle_five.x > ship.x - 2 ) && (missle_five.x < ship.x + 2) ) {
el14af	0:10704407da46	1574	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1575	if ( (missle_five.y > ship.y - 2 ) && (missle_five.y < ship.y + 3) ) {
el14af	0:10704407da46	1576	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1577	missle_five.active = 0;
el14af	0:10704407da46	1578	// set hit flag for missle 1.
el14af	0:10704407da46	1579	missle_five.hit_flag = 1;
el14af	0:10704407da46	1580	//clear missle
el14af	0:10704407da46	1581	lcd.drawRect(missle_five.x-1,missle_five.y-1,2,2,2);
el14af	0:10704407da46	1582	}
el14af	0:10704407da46	1583	}
el14af	0:10704407da46	1584	}
el14af	0:10704407da46	1585	// the process is repeated for the different directions of travel, with a different hitbox shape
el14af	0:10704407da46	1586	if (ship.direction == DOWN) {
el14af	0:10704407da46	1587	if ( (missle_five.x > ship.x - 2 ) && (missle_five.x < ship.x + 2 ) ) {
el14af	0:10704407da46	1588	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1589	if ( (missle_five.y > ship.y - 3 ) && (missle_five.y < ship.y + 2) ) {
el14af	0:10704407da46	1590	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1591	missle_five.active = 0;
el14af	0:10704407da46	1592	// set hit flag for missle 1.
el14af	0:10704407da46	1593	missle_five.hit_flag = 1;
el14af	0:10704407da46	1594	//clear missle
el14af	0:10704407da46	1595	lcd.drawRect(missle_five.x-1,missle_five.y-1,2,2,2);
el14af	0:10704407da46	1596	}
el14af	0:10704407da46	1597	}
el14af	0:10704407da46	1598	}
el14af	0:10704407da46	1599	if (ship.direction == LEFT) {
el14af	0:10704407da46	1600	if ( (missle_five.x > ship.x - 2 ) && (missle_five.x < ship.x + 3) ) {
el14af	0:10704407da46	1601	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1602	if ( (missle_five.y > ship.y - 2 ) && (missle_five.y < ship.y + 2) ) {
el14af	0:10704407da46	1603	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1604	missle_five.active = 0;
el14af	0:10704407da46	1605	// set hit flag for missle 1.
el14af	0:10704407da46	1606	missle_five.hit_flag = 1;
el14af	0:10704407da46	1607	//clear missle
el14af	0:10704407da46	1608	lcd.drawRect(missle_five.x-1,missle_five.y-1,2,2,2);
el14af	0:10704407da46	1609	}
el14af	0:10704407da46	1610	}
el14af	0:10704407da46	1611	}
el14af	0:10704407da46	1612	if (ship.direction == RIGHT) {
el14af	0:10704407da46	1613	if ( (missle_five.x > ship.x - 3 ) && (missle_five.x < ship.x + 2) ) {
el14af	0:10704407da46	1614	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1615	if ( (missle_five.y > ship.y - 2 ) && (missle_five.y < ship.y + 2) ) {
el14af	0:10704407da46	1616	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1617	missle_five.active = 0;
el14af	0:10704407da46	1618	// set hit flag for missle 1.
el14af	0:10704407da46	1619	missle_five.hit_flag = 1;
el14af	0:10704407da46	1620	//clear missle
el14af	0:10704407da46	1621	lcd.drawRect(missle_five.x-1,missle_five.y-1,2,2,2);
el14af	0:10704407da46	1622	}
el14af	0:10704407da46	1623	}
el14af	0:10704407da46	1624	}
el14af	0:10704407da46	1625
el14af	0:10704407da46	1626	// detect missle expires
el14af	0:10704407da46	1627	// depending on the direction of flight, if the missle reaches the border without coming in contact with the ship.
el14af	0:10704407da46	1628	// the missle is set to inactive
el14af	0:10704407da46	1629
el14af	0:10704407da46	1630	if (missle_five.direction == UP) {
el14af	0:10704407da46	1631	if (missle_five.y == 10) {
el14af	0:10704407da46	1632	missle_five.active = 0;
el14af	0:10704407da46	1633
el14af	0:10704407da46	1634	//clear missle
el14af	0:10704407da46	1635	lcd.drawRect(missle_five.x-1,missle_five.y-1,2,2,2);
el14af	0:10704407da46	1636	}
el14af	0:10704407da46	1637
el14af	0:10704407da46	1638	}
el14af	0:10704407da46	1639	if (missle_five.direction == DOWN) {
el14af	0:10704407da46	1640	if (missle_five.y == 44) {
el14af	0:10704407da46	1641	missle_five.active = 0;
el14af	0:10704407da46	1642
el14af	0:10704407da46	1643	//clear missle
el14af	0:10704407da46	1644	lcd.drawRect(missle_five.x-1,missle_five.y-1,2,2,2);
el14af	0:10704407da46	1645	}
el14af	0:10704407da46	1646
el14af	0:10704407da46	1647	}
el14af	0:10704407da46	1648	if (missle_five.direction == LEFT) {
el14af	0:10704407da46	1649	if (missle_five.x == 2 ) {
el14af	0:10704407da46	1650	missle_five.active = 0;
el14af	0:10704407da46	1651
el14af	0:10704407da46	1652	//clear missle
el14af	0:10704407da46	1653	lcd.drawRect(missle_five.x-1,missle_five.y-1,2,2,2);
el14af	0:10704407da46	1654	}
el14af	0:10704407da46	1655
el14af	0:10704407da46	1656	}
el14af	0:10704407da46	1657	if (missle_five.direction == RIGHT) {
el14af	0:10704407da46	1658	if (missle_five.x == 80 ) {
el14af	0:10704407da46	1659	missle_five.active = 0;
el14af	0:10704407da46	1660
el14af	0:10704407da46	1661	//clear missle
el14af	0:10704407da46	1662	lcd.drawRect(missle_five.x-1,missle_five.y-1,2,2,2);
el14af	0:10704407da46	1663	}
el14af	0:10704407da46	1664
el14af	0:10704407da46	1665	}
el14af	0:10704407da46	1666
el14af	0:10704407da46	1667	}
el14af	0:10704407da46	1668	// only preform operations if missle is active for efficiency
el14af	0:10704407da46	1669	if (missle_six.active) {
el14af	0:10704407da46	1670	if (ship.direction == UP) {
el14af	0:10704407da46	1671	//check if the ship is within the x_axis constraints of the hit box
el14af	0:10704407da46	1672	// the structure : if missle x coordinate is greater than the top right pixel of hit box...
el14af	0:10704407da46	1673	// AND
el14af	0:10704407da46	1674	// missle x coordinate is less than top right pixel of hit box + width of the hit box...
el14af	0:10704407da46	1675	// then the missle is in the x constraints.
el14af	0:10704407da46	1676	if ( (missle_six.x > ship.x - 2 ) && (missle_six.x < ship.x + 2) ) {
el14af	0:10704407da46	1677	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1678	if ( (missle_six.y > ship.y - 2 ) && (missle_six.y < ship.y + 3) ) {
el14af	0:10704407da46	1679	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1680	missle_six.active = 0;
el14af	0:10704407da46	1681	// set hit flag for missle 1.
el14af	0:10704407da46	1682	missle_six.hit_flag = 1;
el14af	0:10704407da46	1683	//clear missle
el14af	0:10704407da46	1684	lcd.drawRect(missle_six.x-1,missle_six.y-1,2,2,2);
el14af	0:10704407da46	1685	}
el14af	0:10704407da46	1686	}
el14af	0:10704407da46	1687	}
el14af	0:10704407da46	1688	// the process is repeated for the different directions of travel, with a different hitbox shape
el14af	0:10704407da46	1689	if (ship.direction == DOWN) {
el14af	0:10704407da46	1690	if ( (missle_six.x > ship.x - 2) && (missle_six.x < ship.x + 2 ) ) {
el14af	0:10704407da46	1691	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1692	if ( (missle_six.y > ship.y - 3 ) && (missle_six.y < ship.y + 2) ) {
el14af	0:10704407da46	1693	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1694	missle_six.active = 0;
el14af	0:10704407da46	1695	// set hit flag for missle 1.
el14af	0:10704407da46	1696	missle_six.hit_flag = 1;
el14af	0:10704407da46	1697	//clear missle
el14af	0:10704407da46	1698	lcd.drawRect(missle_six.x-1,missle_six.y-1,2,2,2);
el14af	0:10704407da46	1699	}
el14af	0:10704407da46	1700	}
el14af	0:10704407da46	1701	}
el14af	0:10704407da46	1702	if (ship.direction == LEFT) {
el14af	0:10704407da46	1703	if ( (missle_six.x > ship.x - 2 ) && (missle_six.x < ship.x + 3) ) {
el14af	0:10704407da46	1704	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1705	if ( (missle_six.y > ship.y - 2 ) && (missle_six.y < ship.y + 2) ) {
el14af	0:10704407da46	1706	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1707	missle_six.active = 0;
el14af	0:10704407da46	1708	// set hit flag for missle 1.
el14af	0:10704407da46	1709	missle_six.hit_flag = 1;
el14af	0:10704407da46	1710	//clear missle
el14af	0:10704407da46	1711	lcd.drawRect(missle_six.x-1,missle_six.y-1,2,2,2);
el14af	0:10704407da46	1712	}
el14af	0:10704407da46	1713	}
el14af	0:10704407da46	1714	}
el14af	0:10704407da46	1715	if (ship.direction == RIGHT) {
el14af	0:10704407da46	1716	if ( (missle_six.x > ship.x - 3 ) && (missle_six.x < ship.x + 2) ) {
el14af	0:10704407da46	1717	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1718	if ( (missle_six.y > ship.y - 2 ) && (missle_six.y < ship.y + 2) ) {
el14af	0:10704407da46	1719	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1720	missle_six.active = 0;
el14af	0:10704407da46	1721	// set hit flag for missle 1.
el14af	0:10704407da46	1722	missle_six.hit_flag = 1;
el14af	0:10704407da46	1723	//clear missle
el14af	0:10704407da46	1724	lcd.drawRect(missle_six.x-1,missle_six.y-1,2,2,2);
el14af	0:10704407da46	1725	}
el14af	0:10704407da46	1726	}
el14af	0:10704407da46	1727	}
el14af	0:10704407da46	1728
el14af	0:10704407da46	1729	// detect missle expires
el14af	0:10704407da46	1730	// depending on the direction of flight, if the missle reaches the border without coming in contact with the ship.
el14af	0:10704407da46	1731	// the missle is set to inactive
el14af	0:10704407da46	1732
el14af	0:10704407da46	1733	if (missle_six.direction == UP) {
el14af	0:10704407da46	1734	if (missle_six.y == 10) {
el14af	0:10704407da46	1735	missle_six.active = 0;
el14af	0:10704407da46	1736
el14af	0:10704407da46	1737	//clear missle
el14af	0:10704407da46	1738	lcd.drawRect(missle_six.x-1,missle_six.y-1,2,2,2);
el14af	0:10704407da46	1739	}
el14af	0:10704407da46	1740
el14af	0:10704407da46	1741	}
el14af	0:10704407da46	1742	if (missle_six.direction == DOWN) {
el14af	0:10704407da46	1743	if (missle_six.y == 44) {
el14af	0:10704407da46	1744	missle_six.active = 0;
el14af	0:10704407da46	1745
el14af	0:10704407da46	1746	//clear missle
el14af	0:10704407da46	1747	lcd.drawRect(missle_six.x-1,missle_six.y-1,2,2,2);
el14af	0:10704407da46	1748	}
el14af	0:10704407da46	1749
el14af	0:10704407da46	1750	}
el14af	0:10704407da46	1751	if (missle_six.direction == LEFT) {
el14af	0:10704407da46	1752	if (missle_six.x == 2 ) {
el14af	0:10704407da46	1753	missle_six.active = 0;
el14af	0:10704407da46	1754
el14af	0:10704407da46	1755	//clear missle
el14af	0:10704407da46	1756	lcd.drawRect(missle_six.x-1,missle_six.y-1,2,2,2);
el14af	0:10704407da46	1757	}
el14af	0:10704407da46	1758
el14af	0:10704407da46	1759	}
el14af	0:10704407da46	1760	if (missle_six.direction == RIGHT) {
el14af	0:10704407da46	1761	if (missle_six.x == 80 ) {
el14af	0:10704407da46	1762	missle_six.active = 0;
el14af	0:10704407da46	1763
el14af	0:10704407da46	1764	//clear missle
el14af	0:10704407da46	1765	lcd.drawRect(missle_six.x-1,missle_six.y-1,2,2,2);
el14af	0:10704407da46	1766	}
el14af	0:10704407da46	1767
el14af	0:10704407da46	1768	}
el14af	0:10704407da46	1769	}
el14af	0:10704407da46	1770
el14af	0:10704407da46	1771	//if any of the missles have hit a flag is raised
el14af	0:10704407da46	1772	if (missle_one.hit_flag == 1) {
el14af	0:10704407da46	1773	g_hit_flag = 1;
el14af	0:10704407da46	1774	}
el14af	0:10704407da46	1775	if (missle_two.hit_flag == 1) {
el14af	0:10704407da46	1776	g_hit_flag = 1;
el14af	0:10704407da46	1777	}
el14af	0:10704407da46	1778	if (missle_three.hit_flag == 1) {
el14af	0:10704407da46	1779	g_hit_flag = 1;
el14af	0:10704407da46	1780	}
el14af	0:10704407da46	1781	if (missle_four.hit_flag == 1) {
el14af	0:10704407da46	1782	g_hit_flag = 1;
el14af	0:10704407da46	1783	}
el14af	0:10704407da46	1784	if (missle_five.hit_flag == 1) {
el14af	0:10704407da46	1785	g_hit_flag = 1;
el14af	0:10704407da46	1786	}
el14af	0:10704407da46	1787	if (missle_six.hit_flag == 1) {
el14af	0:10704407da46	1788	g_hit_flag = 1;
el14af	0:10704407da46	1789	}
el14af	0:10704407da46	1790
el14af	0:10704407da46	1791	}
el14af	0:10704407da46	1792	// raises flag for collectible timeout
el14af	0:10704407da46	1793	void collect_timeout ()
el14af	0:10704407da46	1794	{
el14af	0:10704407da46	1795	g_collect_timeout_flag = 1;
el14af	0:10704407da46	1796
el14af	0:10704407da46	1797	}
el14af	0:10704407da46	1798	//prints collectible
el14af	0:10704407da46	1799	void print_collect ()
el14af	0:10704407da46	1800	{
el14af	0:10704407da46	1801	// function first determines what collectible is free to be allocated, and if either collectible has expired
el14af	0:10704407da46	1802
el14af	0:10704407da46	1803	bool collect_free; // variable for determining which collectible struct is free, 0 for collec_one and 1 for collect_two.
el14af	0:10704407da46	1804	// determined by if statments below
el14af	0:10704407da46	1805
el14af	0:10704407da46	1806	// if both collectibles are active
el14af	0:10704407da46	1807	if (collect_one.active && collect_two.active) {
el14af	0:10704407da46	1808
el14af	0:10704407da46	1809	// if either collectible has expired
el14af	0:10704407da46	1810	if (g_collect_timeout_flag == 1) {
el14af	0:10704407da46	1811
el14af	0:10704407da46	1812	// if collect_one has expired
el14af	0:10704407da46	1813	if (!g_what_expired) {
el14af	0:10704407da46	1814	// set to free
el14af	0:10704407da46	1815	collect_free = 0;
el14af	0:10704407da46	1816
el14af	0:10704407da46	1817	// reset collect_one
el14af	0:10704407da46	1818	collect_one.active = 0;
el14af	0:10704407da46	1819
el14af	0:10704407da46	1820	//clear collectible
el14af	0:10704407da46	1821	lcd.drawRect(collect_one.x-1,collect_one.y-1,2,2,2);
el14af	0:10704407da46	1822
el14af	0:10704407da46	1823	//reset timeout flag
el14af	0:10704407da46	1824	g_collect_timeout_flag = 0;
el14af	0:10704407da46	1825
el14af	0:10704407da46	1826	//change the next collectible to expire
el14af	0:10704407da46	1827	g_what_expired = 1;
el14af	0:10704407da46	1828	}
el14af	0:10704407da46	1829	// if collect_two has expired
el14af	0:10704407da46	1830	else {
el14af	0:10704407da46	1831	// set to free
el14af	0:10704407da46	1832	collect_free = 1;
el14af	0:10704407da46	1833
el14af	0:10704407da46	1834	// reset collect_two
el14af	0:10704407da46	1835	collect_two.active = 0;
el14af	0:10704407da46	1836
el14af	0:10704407da46	1837	//clear collectible
el14af	0:10704407da46	1838	lcd.drawRect(collect_two.x-1,collect_two.y-1,2,2,2);
el14af	0:10704407da46	1839
el14af	0:10704407da46	1840	// reset timeout flag
el14af	0:10704407da46	1841	g_collect_timeout_flag = 0;
el14af	0:10704407da46	1842
el14af	0:10704407da46	1843	//change the next collectible to expire
el14af	0:10704407da46	1844	g_what_expired = 0;
el14af	0:10704407da46	1845	}
el14af	0:10704407da46	1846	}
el14af	0:10704407da46	1847	}
el14af	0:10704407da46	1848	// if collect_two has been collected, or has not been allocated yet
el14af	0:10704407da46	1849	else if (collect_one.active && !collect_two.active) {
el14af	0:10704407da46	1850
el14af	0:10704407da46	1851	// set collect_two to free
el14af	0:10704407da46	1852	collect_free = 1;
el14af	0:10704407da46	1853
el14af	0:10704407da46	1854	}
el14af	0:10704407da46	1855	// if collect_one has been collected, or has not been allocated yet
el14af	0:10704407da46	1856	else if (!collect_one.active && collect_two.active) {
el14af	0:10704407da46	1857
el14af	0:10704407da46	1858	// set_collect_one to free
el14af	0:10704407da46	1859	collect_free = 0;
el14af	0:10704407da46	1860
el14af	0:10704407da46	1861	}
el14af	0:10704407da46	1862	// if neither collect_one or collect_two have been assigned, or both have been collected
el14af	0:10704407da46	1863	else if (!collect_one.active && !collect_two.active) {
el14af	0:10704407da46	1864
el14af	0:10704407da46	1865	// set collect_one to free
el14af	0:10704407da46	1866	collect_free = 0;
el14af	0:10704407da46	1867
el14af	0:10704407da46	1868	}
el14af	0:10704407da46	1869
el14af	0:10704407da46	1870	// reset rand() seed
el14af	0:10704407da46	1871	srand(time(NULL));
el14af	0:10704407da46	1872
el14af	0:10704407da46	1873	// the function then allocates a new position to whatever collectible is free
el14af	0:10704407da46	1874
el14af	0:10704407da46	1875	// if collec_one is free
el14af	0:10704407da46	1876	if (!collect_free) {
el14af	0:10704407da46	1877
el14af	0:10704407da46	1878	// sect collect_one to active
el14af	0:10704407da46	1879	collect_one.active = 1;
el14af	0:10704407da46	1880
el14af	0:10704407da46	1881	// assign random x/y coordinates within the bounds of the game edges, takes into account the way drawRect works
el14af	0:10704407da46	1882	collect_one.x = rand ()%80 + 1;
el14af	0:10704407da46	1883	collect_one.y = rand ()%44 + 10;
el14af	0:10704407da46	1884
el14af	0:10704407da46	1885	// draw the collectible
el14af	0:10704407da46	1886	lcd.drawRect(collect_one.x-1,collect_one.y-1,2,2,0);
el14af	0:10704407da46	1887
el14af	0:10704407da46	1888	}// if collec_two is free
el14af	0:10704407da46	1889	else if (collect_free) {
el14af	0:10704407da46	1890
el14af	0:10704407da46	1891	// sect collect_one to active
el14af	0:10704407da46	1892	collect_two.active = 1;
el14af	0:10704407da46	1893
el14af	0:10704407da46	1894	// assign random x/y coordinates within the bounds of the game edges, takes into account the way drawRect works
el14af	0:10704407da46	1895	collect_two.x = rand ()%80 + 1;
el14af	0:10704407da46	1896	collect_two.y = rand ()%44 + 10;
el14af	0:10704407da46	1897
el14af	0:10704407da46	1898	// draw the collectible
el14af	0:10704407da46	1899	lcd.drawRect(collect_two.x-1,collect_two.y-1,2,2,0);
el14af	0:10704407da46	1900	}
el14af	0:10704407da46	1901
el14af	0:10704407da46	1902
el14af	0:10704407da46	1903
el14af	0:10704407da46	1904	}
el14af	0:10704407da46	1905	// redraw collectible in case it disappeared
el14af	0:10704407da46	1906	void update_collect ()
el14af	0:10704407da46	1907	{
el14af	0:10704407da46	1908
el14af	0:10704407da46	1909	if (collect_one.active) {
el14af	0:10704407da46	1910	// draw the collectible
el14af	0:10704407da46	1911	lcd.drawRect(collect_one.x-1,collect_one.y-1,2,2,0);
el14af	0:10704407da46	1912
el14af	0:10704407da46	1913	}
el14af	0:10704407da46	1914	if (collect_two.active) {
el14af	0:10704407da46	1915	// draw the collectible
el14af	0:10704407da46	1916	lcd.drawRect(collect_two.x-1,collect_two.y-1,2,2,0);
el14af	0:10704407da46	1917	}
el14af	0:10704407da46	1918	}
el14af	0:10704407da46	1919
el14af	0:10704407da46	1920	// check if collectible has been collected
el14af	0:10704407da46	1921	void check_collect ()
el14af	0:10704407da46	1922	{
el14af	0:10704407da46	1923
el14af	0:10704407da46	1924	// only preform operations if missle is active for efficiency
el14af	0:10704407da46	1925	if (collect_one.active) {
el14af	0:10704407da46	1926
el14af	0:10704407da46	1927	// ship pointing up
el14af	0:10704407da46	1928	if (ship.direction == UP) {
el14af	0:10704407da46	1929	// check if the collectible is within the ship's the hit box
el14af	0:10704407da46	1930	if ( (collect_one.x > ship.x - 2 ) && (collect_one.x < ship.x + 2) ) {
el14af	0:10704407da46	1931	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1932	if ( (collect_one.y > ship.y - 2 ) && (collect_one.y < ship.y + 3) ) {
el14af	0:10704407da46	1933	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1934	collect_one.active = 0;
el14af	0:10704407da46	1935	// set hit flag for missle 1.
el14af	0:10704407da46	1936	g_collect_flag = 1;
el14af	0:10704407da46	1937	// since collect_one has been reset, collect_two will expire next
el14af	0:10704407da46	1938	g_what_expired = 1;
el14af	0:10704407da46	1939	}
el14af	0:10704407da46	1940	}
el14af	0:10704407da46	1941	}
el14af	0:10704407da46	1942	// ship pointing down
el14af	0:10704407da46	1943	if (ship.direction == DOWN) {
el14af	0:10704407da46	1944	if ( (collect_one.x > ship.x - 2 ) && (collect_one.x < ship.x + 2 ) ) {
el14af	0:10704407da46	1945	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1946	if ( (collect_one.y > ship.y - 3 ) && (collect_one.y < ship.y + 2) ) {
el14af	0:10704407da46	1947	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1948	collect_one.active = 0;
el14af	0:10704407da46	1949	// set hit flag for missle 1.
el14af	0:10704407da46	1950	g_collect_flag = 1;
el14af	0:10704407da46	1951	// since collect_one has been reset, collect_two will expire next
el14af	0:10704407da46	1952	g_what_expired = 1;
el14af	0:10704407da46	1953	}
el14af	0:10704407da46	1954	}
el14af	0:10704407da46	1955	}
el14af	0:10704407da46	1956	// ship pointing left
el14af	0:10704407da46	1957	if (ship.direction == LEFT) {
el14af	0:10704407da46	1958	if ( (collect_one.x > ship.x - 3 ) && (collect_one.x < ship.x + 2) ) {
el14af	0:10704407da46	1959	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1960	if ( (collect_one.y > ship.y - 2 ) && (collect_one.y < ship.y + 2) ) {
el14af	0:10704407da46	1961	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1962	collect_one.active = 0;
el14af	0:10704407da46	1963	// set hit flag for missle 1.
el14af	0:10704407da46	1964	g_collect_flag= 1;
el14af	0:10704407da46	1965	// since collect_one has been reset, collect_two will expire next
el14af	0:10704407da46	1966	g_what_expired = 1;
el14af	0:10704407da46	1967	}
el14af	0:10704407da46	1968	}
el14af	0:10704407da46	1969	}
el14af	0:10704407da46	1970	// ship pointing right
el14af	0:10704407da46	1971	if (ship.direction == RIGHT) {
el14af	0:10704407da46	1972	if ( (collect_one.x > ship.x - 2 ) && (collect_one.x < ship.x + 3) ) {
el14af	0:10704407da46	1973	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1974	if ( (collect_one.y > ship.y - 2 ) && (collect_one.y < ship.y + 2) ) {
el14af	0:10704407da46	1975	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1976	collect_one.active = 0;
el14af	0:10704407da46	1977	// set hit flag for missle 1.
el14af	0:10704407da46	1978	g_collect_flag = 1;
el14af	0:10704407da46	1979	// since collect_one has been reset, collect_two will expire next
el14af	0:10704407da46	1980	g_what_expired = 1;
el14af	0:10704407da46	1981	}
el14af	0:10704407da46	1982	}
el14af	0:10704407da46	1983	}
el14af	0:10704407da46	1984	}
el14af	0:10704407da46	1985
el14af	0:10704407da46	1986	// only preform operations if missle is active for efficiency
el14af	0:10704407da46	1987	if (collect_two.active) {
el14af	0:10704407da46	1988
el14af	0:10704407da46	1989	// ship pointing up
el14af	0:10704407da46	1990	if (ship.direction == UP) {
el14af	0:10704407da46	1991	// check if the collectible is within the ship's the hit box
el14af	0:10704407da46	1992	if ( (collect_two.x > ship.x - 2 ) && (collect_two.x < ship.x + 2) ) {
el14af	0:10704407da46	1993	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	1994	if ( (collect_two.y > ship.y - 2 ) && (collect_one.y < ship.y + 3) ) {
el14af	0:10704407da46	1995	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	1996	collect_two.active = 0;
el14af	0:10704407da46	1997	// set hit flag for missle 1.
el14af	0:10704407da46	1998	g_collect_flag = 1;
el14af	0:10704407da46	1999	// since collect_one has been reset, collect_two will expire next
el14af	0:10704407da46	2000	g_what_expired = 0;
el14af	0:10704407da46	2001	}
el14af	0:10704407da46	2002	}
el14af	0:10704407da46	2003	}
el14af	0:10704407da46	2004	// ship pointing down
el14af	0:10704407da46	2005	if (ship.direction == DOWN) {
el14af	0:10704407da46	2006	if ( (collect_two.x > ship.x - 2 ) && (collect_two.x < ship.x + 2 ) ) {
el14af	0:10704407da46	2007	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	2008	if ( (collect_two.y > ship.y - 3 ) && (collect_two.y < ship.y + 2) ) {
el14af	0:10704407da46	2009	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	2010	collect_two.active = 0;
el14af	0:10704407da46	2011	// set hit flag for missle 1.
el14af	0:10704407da46	2012	g_collect_flag = 1;
el14af	0:10704407da46	2013	// since collect_one has been reset, collect_two will expire next
el14af	0:10704407da46	2014	g_what_expired = 0;
el14af	0:10704407da46	2015	}
el14af	0:10704407da46	2016	}
el14af	0:10704407da46	2017	}
el14af	0:10704407da46	2018	// ship pointing left
el14af	0:10704407da46	2019	if (ship.direction == LEFT) {
el14af	0:10704407da46	2020	if ( (collect_two.x > ship.x - 3 ) && (collect_two.x < ship.x + 2) ) {
el14af	0:10704407da46	2021	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	2022	if ( (collect_two.y > ship.y - 2 ) && (collect_two.y < ship.y + 2) ) {
el14af	0:10704407da46	2023	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	2024	collect_two.active = 0;
el14af	0:10704407da46	2025	// set hit flag for missle 1.
el14af	0:10704407da46	2026	g_collect_flag= 1;
el14af	0:10704407da46	2027	// since collect_one has been reset, collect_two will expire next
el14af	0:10704407da46	2028	g_what_expired = 0;
el14af	0:10704407da46	2029	}
el14af	0:10704407da46	2030	}
el14af	0:10704407da46	2031	}
el14af	0:10704407da46	2032	// ship pointing right
el14af	0:10704407da46	2033	if (ship.direction == RIGHT) {
el14af	0:10704407da46	2034	if ( (collect_two.x > ship.x - 2 ) && (collect_two.x < ship.x + 3) ) {
el14af	0:10704407da46	2035	// same structure for y-axis of hit box. uses height instead of width
el14af	0:10704407da46	2036	if ( (collect_two.y > ship.y - 2 ) && (collect_two.y < ship.y + 2) ) {
el14af	0:10704407da46	2037	// set missle to inactive, i.e. missle explodes
el14af	0:10704407da46	2038	collect_two.active = 0;
el14af	0:10704407da46	2039	// set hit flag for missle 1.
el14af	0:10704407da46	2040	g_collect_flag = 1;
el14af	0:10704407da46	2041	// since collect_one has been reset, collect_two will expire next
el14af	0:10704407da46	2042	g_what_expired = 0;
el14af	0:10704407da46	2043	}
el14af	0:10704407da46	2044	}
el14af	0:10704407da46	2045	}
el14af	0:10704407da46	2046
el14af	0:10704407da46	2047
el14af	0:10704407da46	2048
el14af	0:10704407da46	2049	}
el14af	0:10704407da46	2050	}
el14af	0:10704407da46	2051	// time left
el14af	0:10704407da46	2052	void time_left ()
el14af	0:10704407da46	2053	{
el14af	0:10704407da46	2054	//with every second decrement time left by 1
el14af	0:10704407da46	2055	g_time_left --;
el14af	0:10704407da46	2056
el14af	0:10704407da46	2057	//increases score by 10 every second
el14af	0:10704407da46	2058	g_score = g_score + 10;
el14af	0:10704407da46	2059
el14af	0:10704407da46	2060	// print timer
el14af	0:10704407da46	2061	char buffer[14]; // each character is 6 pixels wide, screen is 84 pixels (84/6 = 14)
el14af	0:10704407da46	2062	// so can display a string of a maximum 14 characters in length
el14af	0:10704407da46	2063	// or create formatted strings - ensure they aren't more than 14 characters long
el14af	0:10704407da46	2064	int length = sprintf(buffer,"Time: %2d ",g_time_left); // print formatted data to buffer
el14af	0:10704407da46	2065	// it is important the format specifier ensures the length will fit in the buffer
el14af	0:10704407da46	2066	if (length <= 14) // if string will fit on display
el14af	0:10704407da46	2067	lcd.printString(buffer,16,0); // display on screen
el14af	0:10704407da46	2068
el14af	0:10704407da46	2069	}

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Type:	Program
Mbed OS support:	Mbed 2 deprecated
Created:	05 May 2016
Imports:	3
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	2
Followers:	113

ESP.cpp@0:10704407da46, 2016-05-05 (annotated)

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