Konstantinos Fane
Lab1
Diff: KF_20901830_space_invaders.cpp
- Revision:
- 10:2fabc22afe95
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/KF_20901830_space_invaders.cpp Mon Nov 23 11:30:36 2020 +0000
@@ -0,0 +1,297 @@
+/*
+* Konstantinos Fane
+* kf289@kent.ac.uk
+* ID: 20901830
+*/
+
+#include "mbed.h"
+#include "C12832.h" // LCD display
+#include "graphics.h"
+
+int numsprite;
+int setup_shooter();
+int draw_shooter(int, int); //Display the shooter at some point shx
+int getnew_shooter(int); // get the new shooter position (X axis)
+void draw_sprite(struct sprite *);
+void endgame(char);
+Bitmap bm ; //Create a bitmap structure
+
+//custom implemented functions and variables
+void move_sprite();
+void draw_moving_bullet(int, int);
+void kill_sprite(struct sprite *);
+int bullet_x_pos;
+int killed_sprites = 0;
+Timer m_t; //to be used for the interrupts that trigger the downward movement
+
+
+int main()
+{
+
+ m_t.start(); //initialise the "move_down" timer
+
+ int nsxp; // new shooter x position
+ int osxp; // old shooter x position
+
+ //Set up the bitmap parameters for the display objects
+ bm.xSize = 16; // 16 pixels wide
+ bm.ySize = 8; // 8 pixels high
+ bm.Byte_in_Line = 2; //i.e. 16bits
+
+ //Initialise the PWM period for the multi colour LED control
+ r.period(0.001);
+ //And turn the 2 active (R and G) colours off
+ r = 1.0; g = 1.0;
+
+ // Draw the shooter image in its initial position
+ // i.e x = 1 and y = 24 the base line
+ osxp = setup_shooter();
+
+ move_sprite();
+
+ while(1)
+ {
+ // Get the new shooter position
+ nsxp = getnew_shooter(osxp);
+
+ //And draw it
+ osxp = draw_shooter(nsxp,osxp);
+ wait(0.02);
+
+ if(m_t.read() > 2) //wait for 2 teconds to create interrupt
+ {
+ move_sprite();
+ m_t.reset();
+ }
+
+ //doesnt matter which spritetab entry is cheched, as even if its killed,
+ //its position will still be incremented
+ if(spritetab[0].ypos >= 18)
+ {
+ endgame(LOSE);
+ break; //while is terminated here
+ }
+
+ //checks whether all sprites have been killed
+ if(killed_sprites == 8)
+ {
+ endgame(WIN);
+ break;
+ }
+
+ if(joyC)
+ {
+ //Assign the position of the bullet shooting point to be the same as the tip of the shooter
+ bullet_x_pos = nsxp + 5;
+ draw_moving_bullet(bullet_x_pos, BASE);
+
+ //destroys the allien sprint
+ if(bullet_x_pos >=1 && bullet_x_pos <=10)
+ {
+ //checks if the sprint has been destroyed already
+ if(spritetab[0].active == 1)
+ {
+ spritetab[0].active = 0;
+ kill_sprite(&spritetab[0]);
+ killed_sprites++; //counter to keep track of how many sprites are killed, to determine whether the game has been won
+ }
+ }
+
+ if(bullet_x_pos >=16 && bullet_x_pos <=26)
+ {
+ if(spritetab[1].active == 1)
+ {
+ spritetab[1].active = 0;
+ kill_sprite(&spritetab[1]);
+ killed_sprites++;
+ }
+ }
+
+ if(bullet_x_pos >=32 && bullet_x_pos <=42) {
+ if(spritetab[2].active == 1)
+ {
+ spritetab[2].active = 0;
+ kill_sprite(&spritetab[2]);
+ killed_sprites++;
+ }
+ }
+
+ if(bullet_x_pos >=48 && bullet_x_pos <=58) {
+ if(spritetab[3].active == 1)
+ {
+ spritetab[3].active = 0;
+ kill_sprite(&spritetab[3]);
+ killed_sprites++;
+ }
+ }
+
+ if(bullet_x_pos >=64 && bullet_x_pos <=74) {
+ if(spritetab[4].active == 1)
+ {
+ spritetab[4].active = 0;
+ kill_sprite(&spritetab[4]);
+ killed_sprites++;
+ }
+ }
+
+ if(bullet_x_pos >=80 && bullet_x_pos <=90) {
+ if(spritetab[5].active == 1)
+ {
+ spritetab[5].active = 0;
+ kill_sprite(&spritetab[5]);
+ killed_sprites++;
+ }
+ }
+
+ if(bullet_x_pos >=96 && bullet_x_pos <=106) {
+ if(spritetab[6].active == 1)
+ {
+ spritetab[6].active = 0;
+ kill_sprite(&spritetab[6]);
+ killed_sprites++;
+ }
+ }
+
+ if(bullet_x_pos >=112 && bullet_x_pos <=123) {
+ if(spritetab[7].active == 1)
+ {
+ spritetab[7].active = 0;
+ kill_sprite(&spritetab[7]);
+ killed_sprites++;
+ }
+ }
+ }
+
+ }
+
+ return 0;
+ }
+
+ //function to print th travelling bullet
+void draw_moving_bullet(int bxpos, int bypos)
+{
+ lcd.setmode(XOR); //similar to how draw_sprite works
+ for( int j=bypos; j>=0; j--) {
+ lcd.pixel(bxpos, j, 1);
+ lcd.pixel(bxpos, j-1, 1);
+ lcd.pixel(bxpos, j-2, 1);
+ lcd.pixel(bxpos, j-3, 1);
+ wait(0.02); //wait is introduced so that the bullet is visible in the screen
+ lcd.copy_to_lcd(); //only one is used, because if a second was used it would delete the bullet drawn already due to the XOR
+ lcd.pixel(bxpos, j, 1);
+ lcd.pixel(bxpos, j-1, 1);
+ lcd.pixel(bxpos, j-2, 1);
+ lcd.pixel(bxpos, j-3, 1);
+ }
+}
+
+//implementation of sprite kill, is parsed the value of the spritetab[i]
+void kill_sprite(struct sprite *ps)
+{
+ //a second print of the same object at the same position deletes the
+ //object @ spritetab[i]
+ bm.data = ps->type; //assigning the type of the spritetab[i] to the bitmap variable
+ lcd.print_bm(bm, ps->xpos, ps->ypos); //prints the created bitmap at the corresponding x,y positions copies the printed data to lcd
+}
+
+
+void move_sprite()
+{
+ for (numsprite = 0; numsprite <= 7; numsprite++) {
+
+ spritetab[numsprite].oldy = spritetab[numsprite].ypos;
+ spritetab[numsprite].ypos++;
+
+ //in here it checks to see whether the sprite is active or not,
+ //if yes it prints it, if not it doesnt print it
+ if(spritetab[numsprite].active != 0)
+ {
+ draw_sprite(&spritetab[numsprite]);
+ }
+ }
+}
+
+// setup the shooter image at location 1
+int setup_shooter()
+{
+ lcd.cls(); //Clear the screen
+ return (draw_shooter(1,0));
+}
+
+
+// Display the shooter at location shx the Y location (BASE) is always 24
+int draw_shooter(int shx, int oldx)//shx = new position , oldx = current (old) position
+{
+ bm.data = shooter; // use the shooter image
+ lcd.setmode(XOR); // XOR mode a second write in the same place erases the image
+
+ if (oldx != 0) {
+ //first time round
+ lcd.print_bm(bm, oldx, BASE); // so this erases current shooter
+ lcd.copy_to_lcd();
+ }
+
+ lcd.print_bm(bm, shx, BASE); // and this draws the new shooter at location shx
+ lcd.copy_to_lcd(); // update lcd
+ return shx; // 'current' position returned to become 'old' position
+
+}
+
+/* Get the new shooter X position in response to left or right
+joystick movements stops at limits x = 1 and x = 112 */
+int getnew_shooter(int oldx)
+{
+ int tmpx = oldx;
+ if (joyL) tmpx--;
+ if (tmpx <= 1) tmpx = 1;
+ if (joyR) tmpx++;
+ if (tmpx >= 112) tmpx = 112;
+ return tmpx;
+}
+
+ // Determine sprite 1 or 2 and display
+ void draw_sprite(struct sprite *ps)
+ {
+
+ bm.data = ps->type; // use sprite image as defined by type
+ lcd.setmode(XOR); // XOR mode a second write in the same place erases the image
+
+ if (ps->oldy != 0){ // first time round
+ lcd.print_bm(bm, ps->xpos, ps->oldy); // so this erases current sprite
+ lcd.copy_to_lcd();
+ }
+
+ lcd.print_bm(bm, ps->xpos, ps->ypos); // and this draws the new sprite at location
+ lcd.copy_to_lcd(); // update lcd
+ }
+
+void endgame( char result) // LED == GREEN for WIN
+{
+ if(result == WIN)
+ {
+ lcd.cls();
+ lcd.locate(20,12);
+ lcd.printf("*** YOU WON ***");
+
+ r = 1.0;
+ g = 0.0;
+ }
+ else
+ {
+ lcd.cls();
+ lcd.locate(17,12);
+ lcd.printf("*** GAME OVER ***");
+
+ r = 0.0;
+ g = 1.0;
+ }
+
+ wait(2);
+ lcd.cls();
+ lcd.locate(13,1);
+ lcd.printf("This game was made by");
+ lcd.locate(24,11);
+ lcd.printf("Konstantinos Fane");
+ lcd.locate(25,21);
+ lcd.printf("kf289@kent.ac.uk");
+}
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