ELEC2645 (2015/16)
/
frdm_Asteroids
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main.cpp
00001 #include "main.h" 00002 00003 ///enumerator stores the 9 possible directions the joystick could be positioned in 00004 enum DirectionName { 00005 Up, 00006 Upright, 00007 Right, 00008 Downright, 00009 Down, 00010 Downleft, 00011 Left, 00012 Upleft, 00013 Center, 00014 }; 00015 00016 typedef struct JoyStick Joystick; 00017 struct JoyStick { 00018 float x; 00019 float x0; 00020 float y; 00021 float y0; 00022 int button; 00023 DirectionName direction ; 00024 }; 00025 Joystick joystick; 00026 int main() 00027 { 00028 00029 lcd.init(); //the screen is initialised to allow interaction 00030 00031 ticker.attach(&timer_isr,0.1); 00032 calibrateJoystick(); 00033 b1.fall(&b1_isr); 00034 b2.fall(&b2_isr); 00035 00036 b1.mode(PullDown); //sets b1 as a pull down 00037 b2.mode(PullDown); //sets b2 as a pull down 00038 00039 //A Welcome message is displayed 00040 00041 lcd.printString("Welcome to",2,1); 00042 lcd.printString("Asteroids" ,2,2); 00043 lcd.refresh(); //the screen is refreshed to display the message 00044 wait(2); //a small wait so the player can read the message 00045 lcd.clear(); //clers the message 00046 g_b1_flag =0; //sets the flags to 0 00047 g_b2_flag = 0; 00048 while(1) { 00049 lcd.printString("Menu",1,1); 00050 lcd.printString("Play",2,2); 00051 lcd.printString("Settings",2,3); //prints the two options on the menu 00052 lcd.refresh(); //refresh required to display on screen 00053 if (g_b2_flag ) { 00054 g_b2_flag =0; //reset the flag 00055 break; //breaks out the while loop and heads into the main game 00056 } 00057 if(g_b1_flag ) { 00058 g_b1_flag = 0; //the flag is cleared 00059 settings =1; //settings variable is increased to 1to allow the settings menu to be accessed 00060 lcd.clear(); 00061 } 00062 00063 while(settings == 1) { 00064 lcd.printString("Normal Mode",2,2); 00065 lcd.printString("Inverse mode",2,3); //prints the options from the settings menu 00066 lcd.refresh(); 00067 00068 if (g_b2_flag ) { 00069 g_b2_flag = 0; //resets the flag 00070 lcd.normalMode(); //normal mode is activated 00071 settings = 0; //the settings is decreased to 0 to exit the loop 00072 lcd.clear(); //the screen is cleared 00073 } 00074 if (g_b1_flag ) { 00075 g_b1_flag = 0; //resets the flag 00076 lcd.inverseMode(); //inverse mode is activated 00077 settings = 0; //settings is decreased to 0 to exit the loop 00078 lcd.clear(); //the screen is cleared 00079 } 00080 } 00081 } 00082 while(1) { 00083 while(game_over == 0) { //so long as game_over is 0 the game will loop 00084 if (g_timer_flag ) { //the code will periodically run based on the timer 00085 g_timer_flag = 0; //resets the timer flag 00086 updateJoystick(); // the joystick is read 00087 lcd.clear(); //the previous screen is cleared 00088 game(); //the game function 00089 score ++; 00090 //the score is incremented with time 00091 lcd.refresh(); //the screen is refreshed to display the updated settings 00092 } 00093 sleep(); //the mbed is put to sleep to try and save power 00094 } 00095 00096 lcd.clear(); //the screen is cleared 00097 char buffer[14]; 00098 sprintf(buffer,"%d",score ); 00099 00100 lcd.printString("GAME OVER",2,2); //the message game over is printed 00101 lcd.printString(buffer,3,3); //the players score is also printed 00102 00103 00104 lcd.refresh(); // refreshes the screen for players to see they lost and their score 00105 wait(2); // a small wait so players can see the score 00106 score = 0; //resets the score 00107 game_over = 0; //reset the game over so players can play again 00108 } 00109 00110 00111 } 00112 00113 00114 00115 /// time-triggered interrupt 00116 void timer_isr() 00117 { 00118 g_timer_flag = 1; // set flag in ISR 00119 } 00120 00121 /// button event-triggered interrupt 00122 void b1_isr() 00123 { 00124 g_b1_flag = 1; // set flag in ISR 00125 } 00126 00127 /// button evet-triggered interrupt 00128 void b2_isr() 00129 { 00130 g_b2_flag = 1; // set flag in ISR 00131 } 00132 00133 ///calibrates Joystick to a default position 00134 void calibrateJoystick() 00135 { 00136 joystick.x0 = xPot; //the current value of the x potentiometer is set as the center position 00137 joystick.y0 = yPot; //the current value of the y potentiometer is set as the center position 00138 } 00139 00140 ///the joystick updates its position 00141 void updateJoystick() 00142 { 00143 joystick.x = xPot - joystick.x0; //the center position of x is subtracted from the current position of the x potentiometer 00144 joystick.y = yPot - joystick.y0; //the center position of y is subtracted from the current position of the y potentiometer 00145 00146 00147 ///based on the value calculated the joystick is given an overall direction 00148 00149 if ( fabs(joystick.y) < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) { 00150 joystick.direction = Center; 00151 } else if (joystick.y > DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) { 00152 joystick.direction = Up; 00153 } else if (joystick.y < DIRECTION_TOLERANCE && fabs(joystick.x) < DIRECTION_TOLERANCE) { 00154 joystick.direction = Down; 00155 } else if (joystick.x > DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) { 00156 joystick.direction = Left; 00157 } else if (joystick.x < DIRECTION_TOLERANCE && fabs(joystick.y) < DIRECTION_TOLERANCE) { 00158 joystick.direction = Right; 00159 } else if (joystick.x < DIRECTION_TOLERANCE && joystick.y > DIRECTION_TOLERANCE) { 00160 joystick.direction = Upright; 00161 } else if (joystick.x < DIRECTION_TOLERANCE && joystick.y < DIRECTION_TOLERANCE) { 00162 joystick.direction = Downright; 00163 } else if (joystick.x > DIRECTION_TOLERANCE && joystick.y > DIRECTION_TOLERANCE) { 00164 joystick.direction = Upleft; 00165 } else if (joystick.x > DIRECTION_TOLERANCE && joystick.y < DIRECTION_TOLERANCE) { 00166 joystick.direction = Downleft; 00167 } 00168 00169 printFlag = 1; 00170 } 00171 ///the function to move and create new bullets 00172 void shoots() 00173 { 00174 /* the array shoot[4][10] is used to move and track the bullets 00175 the first coloumn is used to count the bullet numbers, the second coloumn determines the bullets' direction 00176 and the third and fourth determine the bullets' x & y position. 00177 */ 00178 00179 for(int x = 0; x<10; x++) { //loops through each row in the array 00180 00181 if(shoot[x][0]!=0) { //checks to see if there is a bullet present in that array 00182 00183 switch(shoot[x][1]) { //selects a case based on the directionthe bullet needs to travel 00184 00185 00186 case 0: //shooting up 00187 if (shoot[x][2] == 0) { //start positon of bullet 00188 shoot[x][2] = 24; //starting x coordinate 00189 } 00190 shoot[x][2] = shoot[x][2]; //the bullet's x coordinate will remain constant 00191 if (shoot[x][3] == 0) { //start positon of bullet 00192 shoot[x][3] = 21; //starting y coordinate 00193 } 00194 shoot[x][3] = shoot[x][3]-1; //the bullet's y coordinate decreases to make it move up 00195 break; 00196 00197 00198 case 1: //shooting Up Right 00199 if (shoot[x][2] == 0) { //checks to see if bullet is in start position 00200 shoot[x][2] = 27; //starting x coordinate 00201 } 00202 shoot[x][2] = shoot[x][2]+1; //the bullet's x coordinate will increase to move it right 00203 if (shoot[x][3] == 0) { //checks to see if in starting position 00204 shoot[x][3] = 19; //starting y coordinate 00205 } 00206 shoot[x][3] = shoot[x][3]-1; //the bullet's y coordinate decreases to make it move up 00207 break; 00208 00209 00210 case 2: //Shooting Right 00211 if (shoot[x][2] == 0) { //checks to see if in starting position 00212 shoot[x][2] = 28; //starting x coordinate 00213 } 00214 shoot[x][2] = shoot[x][2]+1; //the bullet's x coordinate increases to move it right 00215 if(shoot[x][3] == 0) { //checks to see if in starting position 00216 shoot[x][3] = 24; //starting y coordinate 00217 } 00218 shoot[x][3] = shoot[x][3]; //as y coordinate doesn't change this is kept constant 00219 break; 00220 00221 00222 case 3: //Shooting Down Right 00223 if(shoot[x][2]==0) { //checks to see if in starting position 00224 shoot[x][2] = 28; //starting x coordinate 00225 } 00226 shoot[x][2] = shoot [x][2]+1; //x coordinate increases to move bullet right 00227 if(shoot [x][3]==0) { //checks to see if in starting position 00228 shoot[x][3] = 27; //starting y coordinate 00229 } 00230 shoot[x][3] = shoot[x][3]+1; //y coordinate increase to move bullet down 00231 break; 00232 00233 00234 case 4: //shoot Down 00235 if (shoot[x][2]==0) { //checks to see if in starting position 00236 shoot[x][2] = 24; //starting x coordinate 00237 } 00238 shoot [x][2] = shoot [x][2]; //down has no x horizontal movement so kept constant 00239 if(shoot [x][3] == 0) { //checks to see if in starting position 00240 shoot[x][3]= 28; //starting y position 00241 } 00242 shoot[x][3] = shoot[x][3]+1; //y coordinate increases to move bullet down 00243 break; 00244 00245 00246 case 5: //shoot down left 00247 if (shoot[x][2]==0) { //checks to see if in starting position 00248 shoot[x][2] = 20; //starting x coordinate 00249 } 00250 shoot[x][2] = shoot [x][2]-1; //x coordinate decreases to move bullet left 00251 if (shoot[x][3]==0) { //checks to see if in starting position 00252 shoot [x][3]= 27; //starting y position 00253 } 00254 shoot[x][3]= shoot[x][3]+1; //y coordinate increases to move bullet down 00255 break; 00256 00257 00258 case 6: //shoot Left 00259 if (shoot[x][2]==0) { //checks to see if in starting position 00260 shoot[x][2] = 21; //starting x position 00261 } 00262 shoot[x][2] = shoot [x][2]-1; //x coordinate decreases causing bullet to move left 00263 if (shoot[x][3]==0) { //checks to see if in starting position 00264 shoot [x][3]= 24; //starting y position 00265 } 00266 shoot[x][3]= shoot[x][3]; //no vertical movement so y coordinate stays constant 00267 break; 00268 00269 00270 case 7: //shoots Up left 00271 if (shoot[x][2]==0) { //checks to see if in starting position 00272 shoot[x][2] = 22; //starting x position 00273 } 00274 shoot[x][2] = shoot [x][2]-1; //x coordinates decrease to move bullet left 00275 if (shoot[x][3]==0) { //checks to see if in starting position 00276 shoot [x][3]= 21; //starting y positon 00277 } 00278 shoot[x][3]= shoot[x][3]-1; //y coodrinates decrease to move bullet up 00279 break; 00280 00281 } 00282 00283 } 00284 } 00285 for (int x=0; x<10; x++) { //loops through each row 00286 if(shoot[x][1]==0 || shoot[x][1]==4) { //checks if the ship is facing up or down 00287 for(int i=0; i<1; i++) { 00288 for(int j=0; j<2; j++) { 00289 if(shootVertical[i][j]==1) { 00290 lcd.setPixel(i+shoot[x][2],j+shoot[x][3]); //loops through and sets pixels to the assigned location 00291 } 00292 } 00293 } 00294 00295 } 00296 if(shoot[x][1]==2 || shoot[x][1]==6) { //checks to see if ship is facing right or left 00297 for(int i=0; i<2; i++) { 00298 for(int j=0; j<1; j++) { 00299 if(shootHorizontal[i][j]==1) { 00300 lcd.setPixel(i+shoot[x][2],j+shoot[x][3]); //sets the horizontal bullet array 00301 } 00302 } 00303 } 00304 } 00305 if(shoot[x][1]==1 || shoot[x][1]==5) { //checks if diagonal1 is the array to use 00306 for(int i=0; i<2; i++) { 00307 for(int j=0; j<2; j++) { 00308 if(shootDiaganol1[i][j]==1) { 00309 lcd.setPixel(i+shoot[x][2],j+shoot[x][3]); //sets the diagonal1 array 00310 } 00311 } 00312 } 00313 00314 } 00315 00316 if(shoot[x][1]==3 || shoot[x][1]==7) { //diagonal2 is called for these directions 00317 for(int i=0; i<3; i++) { 00318 for(int j=0; j<3; j++) { 00319 if(shootDiaganol2[i][j]==1) { 00320 lcd.setPixel(i+shoot[x][2],j+shoot[x][3]); //diagonal2 is set 00321 00322 } 00323 } 00324 } 00325 } 00326 } 00327 } 00328 00329 ///a function to move the asteroids and check for collisions 00330 void asteroidMove() 00331 { 00332 00333 /* the array asteroid[5][8] is used to track and move asteroids the first coloumn is asteroid number 00334 the second coloumn determines asteroid type, the third coloumn is asteroid direction 00335 then fourth and fifth determine x and y coordinates 00336 */ 00337 00338 srand(timer.read_us()); //a random number is generated using the mbed's internal timer as a seed 00339 int r = rand()%8; //the variable r is a random number between 0 and 7 which determines where the asteroid comes from 00340 int number = rand()%4; //the variable number is a random number from 0 to 3 which determines the type of asteroid 00341 00342 00343 for (int x = 0; x<8; x++) { //loops through each row in the array 00344 00345 if(asteroid[x][0] !=0) { //checks to see if the asteroid has not previously been assigned a number 00346 if(asteroid[x][2]==0) { //if the astroid has no assigned type it is assigned here 00347 if(r==0) { 00348 asteroid[x][2]=1; //a random number 0 assigns the direction value to be 1 00349 } 00350 if(r==1) { 00351 asteroid[x][2]=2; //a random number 1 assigns the direction value to be 2 00352 } 00353 if(r==2) { 00354 asteroid[x][2]=3; //a random number 2 assigns the direction value to be 3 00355 } 00356 if(r==3) { 00357 asteroid[x][2]=4; //a random number 3 assigns the direction value to be 4 00358 } 00359 if(r==4) { 00360 asteroid[x][2]=5; //a random number 4 assigns the direction value to be 5 00361 } 00362 if(r==5) { 00363 asteroid[x][2]=6; //a random number 5 assigns the direction value to be 6 00364 } 00365 if(r==6) { 00366 asteroid[x][2]=7; //a random number 6 assigns the direction value to be 7 00367 } 00368 if(r==7) { 00369 asteroid[x][2]=8; //a random number 7 assigns the direction value to be 8 00370 } 00371 00372 00373 ///the random variable number is used to assign the type of asteroid 00374 if(number == 0) { 00375 asteroid[x][1]=1; //0 gives asteroid type 1 00376 } 00377 if(number == 1) { 00378 asteroid[x][1]=2; //1 gives asteroid type 2 00379 } 00380 if(number == 2) { 00381 asteroid[x][1]=3; //2 gives asteroid type 3 00382 } 00383 if(number == 3) { 00384 asteroid[x][1]=4; //3 gives asteroid type 4 00385 } 00386 } 00387 00388 00389 switch(asteroid[x][2]) { //the case is selected based on which direction the asteroid comes from determined by r 00390 00391 00392 case 1: //asteroid from top left 00393 00394 int flag = 0; 00395 00396 00397 if (flag == 1) { 00398 flag=0; //the flag is cleared and bypasses the setting of the array 00399 } else if((asteroid[x][3]<=24)and (asteroid[x][3]+9>= 24) and (asteroid[x][4]<=24) and (asteroid[x][4]+9>=24)) { //checks to see if there is a collision with the ship 00400 game_over = 1; //game over is increased to 1 to end the game 00401 } 00402 00403 else { 00404 //checks if asteroids x coordinates have been set if not sets them 00405 if(asteroid[x][3]==0) { 00406 asteroid[x][3]=1; 00407 } 00408 asteroid[x][3]=asteroid[x][3]+1; //asteroids x coordinate increase to move right 00409 00410 //checks if asteroids y coordinates have been set if not sets them 00411 if(asteroid[x][4]==0) { 00412 asteroid[x][4]=1; 00413 } 00414 asteroid[x][4]=asteroid[x][4]+1; //asteroids y coordinates increase to move down 00415 for (int z=0; z<8; z++) { 00416 if((asteroid[x][3]<=shoot[z][2])and ((asteroid[x][3]+9)>= shoot[z][2]) and (asteroid[x][4]<=shoot[z][3]) and ((asteroid[x][4]+9)>= shoot[z][3])) { // checks to see if an asteroid collides with a bullet 00417 asteroid[x][0]=0; //the asteroid number is erased 00418 asteroid[x][1]=0; //the asteroid type is erased 00419 asteroid[x][2]=0; //the asteroid direction is erased 00420 asteroid[x][3]=0; //the asteroids x position is erased 00421 asteroid[x][4]=0; //the asteroids y positionis erased 00422 shoot[z][0]=0; //the bullets number is erased 00423 shoot[z][1]=0; //the bullets direction is erased 00424 shoot[z][2]=0; //the bullets x coordinate is erased 00425 shoot[z][3]=0; // the bulets y coordinate is erased 00426 flag = 1; //the flag is raised 00427 } 00428 } 00429 break; 00430 } 00431 00432 case 2: //asteroid from top 00433 00434 00435 if (flag == 1) { 00436 flag=0; //the flag is cleared and the setting of asteroids is bypassed 00437 } else if((asteroid[x][3]<=24)and (asteroid[x][3]+9>= 24) and (asteroid[x][4]<=24) and (asteroid[x][4]+9>=24)) { //checks to see if the asteroid collides with the ship 00438 game_over = 1; //if the ship is hit the game over is increased to break the while loop 00439 } else { 00440 //checks if asteroids x coordinates have been set if not sets them 00441 if(asteroid[x][3]==0) { 00442 asteroid[x][3]=20; 00443 } 00444 asteroid[x][3]=asteroid[x][3]; //moving vertically so x coordinates don't change 00445 00446 //checks if asteroids y coordinates have been set if not sets them 00447 if(asteroid[x][4]==0) { 00448 asteroid[x][4]=1; 00449 } 00450 asteroid[x][4]=asteroid[x][4]+1; //moving down so y coordinates need to increase 00451 for (int z=0; z<8; z++) { 00452 if((asteroid[x][3]<=shoot[z][2])and ((asteroid[x][3]+9)>= shoot[z][2]) and (asteroid[x][4]<=shoot[z][3]) and ((asteroid[x][4]+9)>= shoot[z][3])) { // checks to see if an asteroid collides with a bullet 00453 asteroid[x][0]=0; //the asteroid number is erased 00454 asteroid[x][1]=0; //the asteroid type is erased 00455 asteroid[x][2]=0; //the asteroid direction is erased 00456 asteroid[x][3]=0; //the asteroids x position is erased 00457 asteroid[x][4]=0; //the asteroids y positionis erased 00458 shoot[z][0]=0; //the bullets number is erased 00459 shoot[z][1]=0; //the bullets direction is erased 00460 shoot[z][2]=0; //the bullets x coordinate is erased 00461 shoot[z][3]=0; // the bulets y coordinate is erased 00462 flag = 1; //the flag is raised 00463 } 00464 } 00465 break; 00466 } 00467 00468 case 3: //asteroid from top right 00469 00470 00471 if (flag == 1) { 00472 flag=0; //the flag is cleared and the setting of asteroids is bypassed 00473 } else if((asteroid[x][3]<=24)and (asteroid[x][3]+9>= 24) and (asteroid[x][4]<=24) and (asteroid[x][4]+9>=24)) { //checks for collisions with the ship 00474 game_over =1; //game over is increased to one to break the while loop 00475 } else { 00476 //checks if asteroids x coordinates have been set if not sets them 00477 if(asteroid[x][3]==0) { 00478 asteroid[x][3]=48; 00479 } 00480 asteroid[x][3]=asteroid[x][3]-1; //asteroid is moving left so the x coordinate decreases 00481 00482 //checks if asteroids y coordinates have been set if not sets them 00483 if(asteroid[x][4]==0) { 00484 asteroid[x][4]=1; 00485 } 00486 asteroid[x][4]=asteroid[x][4]+1; //asteroid is moving from top so the y coordinate increases 00487 for (int z=0; z<8; z++) { 00488 if((asteroid[x][3]<=shoot[z][2])and ((asteroid[x][3]+9)>= shoot[z][2]) and (asteroid[x][4]<=shoot[z][3]) and ((asteroid[x][4]+9)>= shoot[z][3])) { // checks to see if an asteroid collides with a bullet 00489 asteroid[x][0]=0; //the asteroid number is erased 00490 asteroid[x][1]=0; //the asteroid type is erased 00491 asteroid[x][2]=0; //the asteroid direction is erased 00492 asteroid[x][3]=0; //the asteroids x position is erased 00493 asteroid[x][4]=0; //the asteroids y positionis erased 00494 shoot[z][0]=0; //the bullets number is erased 00495 shoot[z][1]=0; //the bullets direction is erased 00496 shoot[z][2]=0; //the bullets x coordinate is erased 00497 shoot[z][3]=0; // the bulets y coordinate is erased 00498 flag = 1; //the flag is raised 00499 } 00500 } 00501 break; 00502 } 00503 00504 case 4: //asteroid from right 00505 00506 00507 if (flag == 1) { 00508 flag=0; //the flag is cleared and astroids being set is bypassed 00509 } else if((asteroid[x][3]<=24)and (asteroid[x][3]+9>= 24) and (asteroid[x][4]<=24) and (asteroid[x][4]+9>= 24)) { //checks if the ship has been hit 00510 game_over = 1; //game_over is increased to 1 to break the while loop 00511 } else { 00512 //checks if asteroids x coordinates have been set if not sets them 00513 if(asteroid[x][3]==0) { 00514 asteroid[x][3]=48; 00515 } 00516 asteroid[x][3]=asteroid[x][3]-1; //the x coordinate decreases to move the ship left 00517 00518 //checks if asteroids y coordinates have been set if not sets them 00519 if(asteroid[x][4]==0) { 00520 asteroid[x][4]=20; 00521 } 00522 asteroid[x][4]=asteroid[x][4]; // no vertical movement so stays constant 00523 for (int z=0; z<8; z++) { 00524 if((asteroid[x][3]<=shoot[z][2])and ((asteroid[x][3]+9)>= shoot[z][2]) and (asteroid[x][4]<=shoot[z][3]) and ((asteroid[x][4]+9)>= shoot[z][3])) { // checks to see if an asteroid collides with a bullet 00525 asteroid[x][0]=0; //the asteroid number is erased 00526 asteroid[x][1]=0; //the asteroid type is erased 00527 asteroid[x][2]=0; //the asteroid direction is erased 00528 asteroid[x][3]=0; //the asteroids x position is erased 00529 asteroid[x][4]=0; //the asteroids y positionis erased 00530 shoot[z][0]=0; //the bullets number is erased 00531 shoot[z][1]=0; //the bullets direction is erased 00532 shoot[z][2]=0; //the bullets x coordinate is erased 00533 shoot[z][3]=0; // the bulets y coordinate is erased 00534 flag = 1; //the flag is raised 00535 } 00536 } 00537 break; 00538 } 00539 00540 case 5: //asteroid from down right 00541 00542 00543 if (flag == 1) { 00544 flag=0; //flag is cleared and setting of asteroids is bypassed 00545 } else if((asteroid[x][3]<=24)and (asteroid[x][3]+9>= 24) and (asteroid[x][4]<=24) and (asteroid[x][4]+9>=24)) { //checks if the asteroid has collided with the ship 00546 game_over = 1; //game_over is increased breaking the while loop and causing the game to end 00547 } else { 00548 //checks if asteroids x coordinates have been set if not sets them 00549 if(asteroid[x][3]==0) { 00550 asteroid[x][3]=48; 00551 } 00552 asteroid[x][3]=asteroid[x][3]-1; //x coordinates decrease to move ship left 00553 00554 //checks if asteroids y coordinates have been set if not sets them 00555 if(asteroid[x][4]==0) { 00556 asteroid[x][4]=48; 00557 } 00558 asteroid[x][4]=asteroid[x][4]-1; //y coordinates decrease to move ship up 00559 for (int z=0; z<8; z++) { 00560 if((asteroid[x][3]<=shoot[z][2])and ((asteroid[x][3]+9)>= shoot[z][2]) and (asteroid[x][4]<=shoot[z][3]) and ((asteroid[x][4]+9)>= shoot[z][3])) { // checks to see if an asteroid collides with a bullet 00561 asteroid[x][0]=0; //the asteroid number is erased 00562 asteroid[x][1]=0; //the asteroid type is erased 00563 asteroid[x][2]=0; //the asteroid direction is erased 00564 asteroid[x][3]=0; //the asteroids x position is erased 00565 asteroid[x][4]=0; //the asteroids y positionis erased 00566 shoot[z][0]=0; //the bullets number is erased 00567 shoot[z][1]=0; //the bullets direction is erased 00568 shoot[z][2]=0; //the bullets x coordinate is erased 00569 shoot[z][3]=0; // the bulets y coordinate is erased 00570 flag = 1; //the flag is raised 00571 } 00572 } 00573 break; 00574 } 00575 00576 case 6: //asteroid from bottom 00577 00578 00579 if (flag == 1) { 00580 flag=0; //the flag is cleared and the setting of the asteroids is bypassed 00581 } else if((asteroid[x][3]<=24)and (asteroid[x][3]+9>= 24) and (asteroid[x][4]<=24) and (asteroid[x][4]+9>=24)) { //checks to see if the ship has been hit 00582 game_over = 1; //game over is increased to 1 which ends the game 00583 } else { 00584 //checks if asteroids x coordinates have been set if not sets them 00585 if(asteroid[x][3]==0) { 00586 asteroid[x][3]=20; 00587 } 00588 asteroid[x][3]=asteroid[x][3]; //as no horizontal movement the x coordinates are constant 00589 00590 //checks if asteroids y coordinates have been set if not sets them 00591 if(asteroid[x][4]==0) { 00592 asteroid[x][4]=48; 00593 } 00594 asteroid[x][4]=asteroid[x][4]-1; //the y coordinate decreases to cause the asteroid to move up 00595 for (int z=0; z<8; z++) { 00596 if((asteroid[x][3]<=shoot[z][2])and ((asteroid[x][3]+9)>= shoot[z][2]) and (asteroid[x][4]<=shoot[z][3]) and ((asteroid[x][4]+9)>= shoot[z][3])) { // checks to see if an asteroid collides with a bullet 00597 asteroid[x][0]=0; //the asteroid number is erased 00598 asteroid[x][1]=0; //the asteroid type is erased 00599 asteroid[x][2]=0; //the asteroid direction is erased 00600 asteroid[x][3]=0; //the asteroids x position is erased 00601 asteroid[x][4]=0; //the asteroids y positionis erased 00602 shoot[z][0]=0; //the bullets number is erased 00603 shoot[z][1]=0; //the bullets direction is erased 00604 shoot[z][2]=0; //the bullets x coordinate is erased 00605 shoot[z][3]=0; // the bulets y coordinate is erased 00606 flag = 1; //the flag is raised 00607 } 00608 } 00609 break; 00610 } 00611 00612 case 7: //asteroid from bottom left 00613 00614 if (flag == 1) { 00615 flag=0; //clears the flag and bypasses the setting of asteroids 00616 } else if((asteroid[x][3]<=24)and (asteroid[x][3]+9>= 24) and (asteroid[x][4]<=24) and (asteroid[x][4]+9>=24)) { //checks to see if there is a collision with the ship 00617 game_over =1; //raises game over to 1 to break the while loop 00618 } else { 00619 //checks if asteroids x coordinates have been set if not sets them 00620 if(asteroid[x][3]==0) { 00621 asteroid[x][3]=1; 00622 } 00623 asteroid[x][3]=asteroid[x][3]+1; //x coordinates increase to move asteroid right 00624 00625 //checks if asteroids y coordinates have been set if not sets them 00626 if(asteroid[x][4]==0) { 00627 asteroid[x][4]=48; 00628 } 00629 asteroid[x][4]=asteroid[x][4]-1; //y coordinates decrease to move asteroid up 00630 for (int z=0; z<8; z++) { 00631 if((asteroid[x][3]<=shoot[z][2])and ((asteroid[x][3]+9)>= shoot[z][2]) and (asteroid[x][4]<=shoot[z][3]) and ((asteroid[x][4]+9)>= shoot[z][3])) { // checks to see if an asteroid collides with a bullet 00632 asteroid[x][0]=0; //the asteroid number is erased 00633 asteroid[x][1]=0; //the asteroid type is erased 00634 asteroid[x][2]=0; //the asteroid direction is erased 00635 asteroid[x][3]=0; //the asteroids x position is erased 00636 asteroid[x][4]=0; //the asteroids y positionis erased 00637 shoot[z][0]=0; //the bullets number is erased 00638 shoot[z][1]=0; //the bullets direction is erased 00639 shoot[z][2]=0; //the bullets x coordinate is erased 00640 shoot[z][3]=0; // the bulets y coordinate is erased 00641 flag = 1; //the flag is raised 00642 } 00643 } 00644 break; 00645 } 00646 00647 case 8: //asteroid from left 00648 00649 if (flag == 1) { 00650 flag=0; //clears the flag and bypasses the asteroid placement 00651 } else if((asteroid[x][3]<=24)and (asteroid[x][3]+9>= 24) and (asteroid[x][4]<=24) and (asteroid[x][4]+9>=24)) { //checks to see if the ship has been hit 00652 game_over = 1; //game over is increased to 1 to break the while loop 00653 } else { 00654 //checks if asteroids x coordinates have been set if not sets them 00655 if(asteroid[x][3]==0) { 00656 asteroid[x][3]=1; 00657 } 00658 asteroid[x][3]=asteroid[x][3]+1; //x coordinates increase to move ship right 00659 00660 //checks if asteroids y coordinates have been set if not sets them 00661 if(asteroid[x][4]==0) { 00662 asteroid[x][4]=20; 00663 } 00664 asteroid[x][4]=asteroid[x][4]; //y coordinates stay constant as there is no vertical movement 00665 for (int z=0; z<8; z++) { 00666 if((asteroid[x][3]<=shoot[z][2])and ((asteroid[x][3]+9)>= shoot[z][2]) and (asteroid[x][4]<=shoot[z][3]) and ((asteroid[x][4]+9)>= shoot[z][3])) { // checks to see if an asteroid collides with a bullet 00667 asteroid[x][0]=0; //the asteroid number is erased 00668 asteroid[x][1]=0; //the asteroid type is erased 00669 asteroid[x][2]=0; //the asteroid direction is erased 00670 asteroid[x][3]=0; //the asteroids x position is erased 00671 asteroid[x][4]=0; //the asteroids y positionis erased 00672 shoot[z][0]=0; //the bullets number is erased 00673 shoot[z][1]=0; //the bullets direction is erased 00674 shoot[z][2]=0; //the bullets x coordinate is erased 00675 shoot[z][3]=0; // the bulets y coordinate is erased 00676 flag = 1; //the flag is raised 00677 } 00678 } 00679 break; 00680 } 00681 } 00682 00683 //for asteroid type 1 the code loops through the array for asteroid1 and sets the pixels 00684 if (asteroid[x][1] == 1) { 00685 for (int i = 0; i<9; i++) { 00686 for (int j=0; j<9; j++) { 00687 if (asteroid1[i][j]==1) { 00688 lcd.setPixel(i+asteroid[x][3],j+asteroid[x][4]); 00689 } 00690 } 00691 } 00692 } 00693 //for asteroid type 2 the code loops through the array for asteroid2 and sets the pixels 00694 if(asteroid[x][1] == 2) { 00695 for (int i = 0; i<8; i++) { 00696 for (int j=0; j<9; j++) { 00697 if (asteroid2[i][j]==1) { 00698 lcd.setPixel(i+ asteroid[x][3],j+asteroid[x][4]); 00699 } 00700 } 00701 } 00702 00703 } 00704 //for asteroid type 3 the code loops through the array for asteroid3 and sets the pixels 00705 if(asteroid[x][1] == 3) { 00706 for (int i = 0; i<9; i++) { 00707 for (int j=0; j<9; j++) { 00708 if (asteroid3[i][j]==1) { 00709 lcd.setPixel(i+ asteroid[x][3],j+asteroid[x][4]); 00710 } 00711 } 00712 } 00713 00714 } 00715 //for asteroid type 4 the code loops through the array for asteroid4 and sets the pixels 00716 if(asteroid[x][1] == 4) { 00717 for (int i = 0; i<9; i++) { 00718 for (int j=0; j<9; j++) { 00719 if (asteroid4[i][j]==1) { 00720 lcd.setPixel(i+ asteroid[x][3],j+asteroid[x][4]); 00721 } 00722 } 00723 } 00724 } 00725 } 00726 00727 } 00728 00729 } 00730 void game() 00731 { 00732 00733 00734 00735 if (printFlag == 1) { 00736 timer.start(); 00737 printFlag = 0; //resets printFlag 00738 00739 //the joystick direction determines the direction of the FSM 00740 if(joystick.direction == Up) { 00741 direction = UP; 00742 } else if(joystick.direction == Right) { 00743 direction = RIGHT; 00744 } else if(joystick.direction == Down) { 00745 direction = DOWN; 00746 } else if(joystick.direction == Left) { 00747 direction = LEFT; 00748 } else if(joystick.direction == Upright) { 00749 direction = UPRIGHT; 00750 } else if(joystick.direction == Downright) { 00751 direction = DOWNRIGHT; 00752 } else if(joystick.direction == Downleft) { 00753 direction = DOWNLEFT; 00754 } else if(joystick.direction == Upleft) { 00755 direction = UPLEFT; 00756 } 00757 } 00758 00759 //loops through coloumn 48 to draw a line to make the playing area square 00760 for (int j = 0;j < WIDTH;j++) { 00761 lcd.setPixel(48,j); 00762 } 00763 lcd.drawRect(48,0,35,47,1); 00764 // set shipDirection of current state (use dot syntax to access struct members) 00765 shipDirection = fsm [state ].shipDirection; 00766 // set the next state depending on direction 00767 state = fsm [state ].next_state[direction ]; 00768 00769 //from the FSM the next direction is chosen and the code loops through the appropriate array to face the ship in that direction 00770 if (shipDirection == 6) { 00771 for (int i = 0; i<9; i++) { 00772 for (int j=0; j<9; j++) { 00773 if (shipUp[i][j]==1) { 00774 lcd.setPixel(i+20,j+20); 00775 } 00776 } 00777 } 00778 } 00779 //from the FSM the next direction is chosen and the code loops through the appropriate array to face the ship in that direction 00780 else if (shipDirection == 5) { 00781 for (int i = 0; i<9; i++) { 00782 for (int j=0; j<9; j++) { 00783 if (shipUR[i][j]==1) { 00784 lcd.setPixel(i+20,j+20); 00785 } 00786 } 00787 } 00788 } 00789 ///from the FSM the next direction is chosen and the code loops through the appropriate array to face the ship in that direction 00790 else if (shipDirection == 4) { 00791 for (int i = 0; i<9; i++) { 00792 for (int j=0; j<9; j++) { 00793 if (shipRight[i][j]==1) { 00794 lcd.setPixel(i+20,j+20); 00795 } 00796 } 00797 } 00798 00799 } 00800 //from the FSM the next direction is chosen and the code loops through the appropriate array to face the ship in that direction 00801 else if (shipDirection == 3) { 00802 for (int i = 0; i<9; i++) { 00803 for (int j=0; j<9; j++) { 00804 if (shipDR[i][j]==1) { 00805 lcd.setPixel(i+20,j+20); 00806 } 00807 } 00808 00809 } 00810 } 00811 //from the FSM the next direction is chosen and the code loops through the appropriate array to face the ship in that direction 00812 else if (shipDirection == 2) { 00813 for (int i = 0; i<9; i++) { 00814 for (int j=0; j<9; j++) { 00815 if (shipDown[i][j]==1) { 00816 lcd.setPixel(i+20,j+20); 00817 } 00818 } 00819 } 00820 00821 } 00822 //from the FSM the next direction is chosen and the code loops through the appropriate array to face the ship in that direction 00823 else if (shipDirection == 1) { 00824 for (int i = 0; i<9; i++) { 00825 for (int j=0; j<9; j++) { 00826 if (shipDL[i][j]==1) { 00827 lcd.setPixel(i+20,j+20); 00828 } 00829 } 00830 } 00831 00832 } 00833 //from the FSM the next direction is chosen and the code loops through the appropriate array to face the ship in that direction 00834 else if (shipDirection == 0) { 00835 for (int i = 0; i<9; i++) { 00836 for (int j=0; j<9; j++) { 00837 if (shipLeft[i][j]==1) { 00838 lcd.setPixel(i+20,j+20); 00839 } 00840 } 00841 } 00842 00843 } 00844 //from the FSM the next direction is chosen and the code loops through the appropriate array to face the ship in that direction 00845 else { 00846 for (int i = 0; i<9; i++) { 00847 for (int j=0; j<9; j++) { 00848 if (shipUL[i][j]==1) { 00849 lcd.setPixel(i+20,j+20); 00850 } 00851 } 00852 } 00853 00854 } 00855 00856 srand(timer.read_us()); //using the timer on the mbed a random number is generated 00857 00858 int random = rand()%30; //a random number from 1 to 30 is generated 00859 if(random ==1) { //there is a 10% chance of an asteroid every iteration of code 00860 for(int x = 0; x<8; x++) { //checks to see what number asteroid to place 00861 if (asteroid[x][0]==0) { 00862 asteroid[x][0]= x+1; //if there is not an asteroid in the selected row then one will be placed there 00863 break; 00864 } 00865 } 00866 } 00867 00868 asteroidMove(); //the asteroid move function is called 00869 00870 if(g_b1_flag ) { //checks to see if the interrupt has been pressed 00871 g_b1_flag = 0; //after the interupt the flag is reset 00872 for (int x = 0; x<10; x++) { 00873 if (shoot[x][0] == 0) { //checks to see if there is a bullet in the row of the shoot array 00874 bullet_number ++; //the bullet number is increased by 1 00875 shoot[x][0]=bullet_number ; //the bullet number is placed in the shoot array 00876 shoot[x][1]=shipDirection ; //the direction the ship is facing is recorded in the shoot array 00877 break; 00878 } 00879 } 00880 } 00881 00882 shoots(); //calls the shoots function 00883 checkbullet(); //calls the check bullet function 00884 timer.stop(); //makes the timer stop 00885 00886 } 00887 00888 00889 00890 //a function to check if the bullet is still on screen 00891 void checkbullet() 00892 { 00893 for (int x = 0; x<10; x++) { //loops through each row of the shoot array 00894 if ((shoot[x][2] == 0)or(shoot[x][3] == 0)or(shoot[x][2] == 48) or(shoot[x][3] == 48)) { //checks the 4 orders 00895 shoot[x][0]=0; //bullet_number is erased 00896 shoot[x][1]=0; //shipDirection is erased 00897 shoot[x][2]=0; //bullet x coordinate is erased 00898 shoot[x][3]=0; //bullet y coordinate is erased 00899 00900 } 00901 } 00902 } 00903 //void checkAsteroid() 00904 //{ 00905 // for (int x = 0; x<8; x++) { //loops through each row of the shoot array 00906 // if ((asteroid[x][3] == 0)or(asteroid[x][4] == 0)or(asteroid[x][3] == 48) or(asteroid[x][4] == 48)) { //checks the 4 orders 00907 // asteroid[x][0]=0; //bullet_number is erased 00908 // asteroid[x][1]=0; //shipDirection is erased 00909 // asteroid[x][2]=0; //bullet x coordinate is erased 00910 // asteroid[x][3]=0; //bullet y coordinate is erased 00911 // asteroid[x][4]=0; 00912 // } 00913 // } 00914 //}
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