155 lines
3.8 KiB
C
155 lines
3.8 KiB
C
#include <gb/gb.h>
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#include <gb/drawing.h>
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#include <rand.h>
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const UBYTE badguy_ai[] = {
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32, 32, 33, 34, 35, 35, 36, 37,
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38, 38, 39, 40, 41, 41, 42, 43,
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44, 44, 45, 46, 46, 47, 48, 48,
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49, 50, 50, 51, 51, 52, 53, 53,
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54, 54, 55, 55, 56, 56, 57, 57,
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58, 58, 58, 59, 59, 60, 60, 60,
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61, 61, 61, 61, 62, 62, 62, 62,
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62, 63, 63, 63, 63, 63, 63, 63,
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63, 63, 63, 63, 63, 63, 63, 63,
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62, 62, 62, 62, 62, 61, 61, 61,
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61, 60, 60, 60, 59, 59, 59, 58,
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58, 57, 57, 56, 56, 55, 55, 54,
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54, 53, 53, 52, 52, 51, 50, 50,
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49, 49, 48, 47, 47, 46, 45, 44,
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44, 43, 42, 42, 41, 40, 39, 39,
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38, 37, 36, 36, 35, 34, 33, 33,
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32, 31, 30, 29, 29, 28, 27, 26,
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26, 25, 24, 23, 23, 22, 21, 20,
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20, 19, 18, 18, 17, 16, 16, 15,
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14, 14, 13, 12, 12, 11, 11, 10,
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9, 9, 8, 8, 7, 7, 6, 6,
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6, 5, 5, 4, 4, 4, 3, 3,
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3, 2, 2, 2, 1, 1, 1, 1,
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1, 1, 0, 0, 0, 0, 0, 0,
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0, 0, 0, 0, 0, 0, 0, 0,
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1, 1, 1, 1, 1, 1, 2, 2,
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2, 3, 3, 3, 4, 4, 4, 5,
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5, 5, 6, 6, 7, 7, 8, 8,
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9, 9, 10, 11, 11, 12, 12, 13,
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14, 14, 15, 16, 16, 17, 18, 18,
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19, 20, 20, 21, 22, 23, 23, 24,
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25, 26, 26, 27, 28, 29, 29, 30
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};
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UBYTE playing, joypad_state;
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UBYTE player_x, player_y;
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UBYTE badguy_x, badguy_y, badguy_z, badguy_offset;
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UBYTE player_shot_x, player_shot_y, player_shot_z;
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void update_graphics(void) {
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disable_interrupts();
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scroll_bkg(1, 0);
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move_sprite(0, player_x, player_y);
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move_sprite(1, badguy_x, badguy_y);
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move_sprite(2, player_shot_x, player_shot_y);
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enable_interrupts();
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}
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void update_joypad(void) {
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joypad_state = joypad();
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if(joypad_state & J_LEFT) {
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if(player_x > 8)
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player_x--;
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}
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if(joypad_state & J_RIGHT) {
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if(player_x < 160)
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player_x++;
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}
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if(joypad_state & J_UP) {
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if(player_y > 16)
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player_y--;
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}
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if(joypad_state & J_DOWN) {
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if(player_y < 152)
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player_y++;
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}
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if(joypad_state & J_A) {
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if(player_shot_z == 0) {
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player_shot_z = 1;
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player_shot_x = player_x;
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player_shot_y = player_y;
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}
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}
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if(player_shot_z == 1) {
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player_shot_x = player_shot_x + 2;
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if(player_shot_x > 240) {
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player_shot_x = 250;
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player_shot_y = 250;
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player_shot_z = 0;
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}
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}
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}
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void update_badguy(void) {
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badguy_x = badguy_x - 1;
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if(badguy_x > 240) {
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badguy_offset = rand();
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while(badguy_offset > 134) {
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badguy_offset = rand();
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}
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badguy_x = 239;
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}
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badguy_y = badguy_offset + badguy_ai[badguy_z];
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badguy_z++;
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}
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void collision_detection(void) {
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if(player_shot_y > badguy_y - 4) {
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if(player_shot_y < badguy_y + 4) {
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if(player_shot_x > badguy_x - 4) {
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if(player_shot_x < badguy_x + 4) {
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player_shot_z = 0;
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player_shot_x = 250;
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player_shot_y = 250;
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badguy_x = 255;
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}
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}
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}
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}
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if(player_y > badguy_y - 4) {
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if(player_y < badguy_y + 4) {
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if(player_x > badguy_x - 4) {
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if(player_x < badguy_x + 4) {
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playing = 0;
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delay(1000);
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}
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}
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}
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}
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}
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void do_gameplay(void) {
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playing = 1;
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player_x = GRAPHICS_WIDTH / 2;
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player_y = GRAPHICS_HEIGHT / 2;
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while(playing == 1) {
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update_joypad();
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update_badguy();
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collision_detection();
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delay(10);
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}
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}
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