Airplane GameBoy Breakout

main.c

#include <stdint.h>
#include <stdio.h>

#include <gb/gb.h>

// Screen is 20 tiles across, 18 tiles tall
// Blocks should fill from 1,2 to 18, 9

uint8_t paddleSprite[] = {
	0b00000000, 0b00000000,
	0b00000000, 0b00000000,
	0b00000000, 0b00000000,
	0b11111111, 0b11111111,
	0b11111111, 0b11111111,
	0b00000000, 0b00000000,
	0b00000000, 0b00000000,
	0b00000000, 0b00000000
};

uint8_t blockSprite[] = {
	0b00000000, 0b00000000,
	0b00000000, 0b00000000,
	0b00000000, 0b00000000,
	0b01111110, 0b01111110,
	0b01111110, 0b01111110,
	0b00000000, 0b00000000,
	0b00000000, 0b00000000,
	0b00000000, 0b00000000
};

uint8_t ballSprite[] = {
	0b00000000, 0b00000000,
	0b00111100, 0b00111100,
	0b01111110, 0b01111110,
	0b01111110, 0b01111110,
	0b01111110, 0b01111110,
	0b01111110, 0b01111110,
	0b00111100, 0b00111100,
	0b00000000, 0b00000000
};

uint8_t blankTile[] = {
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
};

uint8_t blockLayout[] = {
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00,
	0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00,
	0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00,
	0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00,
	0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00,
	0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00,
	0x00,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x01,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
};

uint8_t blankBlockLayout[] = {0x00};

int paddleX = 50;
int paddleY = 140;

int ballX, ballY;

int ballVx, ballVy;

void resetBall() {
	ballX = paddleX-8;
	ballY = paddleY-5;

	ballVx = 0;
	ballVy = 0;
}

void startBall() {
	ballVx = rand() % 2 - 1; // 0, 1, 2 -> -1, 0, 1
	ballVy = -2;	
}

int checkPaddleCollision() {
	if (ballVy < 0) return 0;
	if (((ballY > 135) && ballY < (140 + 5))
		&& (ballX > paddleX - 4) && (ballX < (paddleX + 8 + 4))) {
		return 1;
	} else {
		return 0;
	}
}

void main() {

	SHOW_SPRITES;
	SHOW_BKG;

	// Load the paddle
	set_sprite_data(0, 1, paddleSprite);
	set_sprite_tile(0, 0);

	// Load the ball
	set_sprite_data(1, 1, ballSprite);
	set_sprite_tile(1, 1);

	// Load the background
	set_bkg_data(0, 1, blankTile);
	fill_bkg_rect(0, 0, DEVICE_SCREEN_WIDTH, DEVICE_SCREEN_HEIGHT, 0);

	set_bkg_data(1, 1, blockSprite);
	set_bkg_tiles(0, 0, DEVICE_SCREEN_WIDTH, DEVICE_SCREEN_HEIGHT, blockLayout);
	set_bkg_tiles(2, 2, 1, 1, 0);

	resetBall();

    while (1) {
    	uint8_t joypadState = joypad();

    	if (joypadState & J_LEFT) paddleX -= 2;
    	if (joypadState & J_RIGHT) paddleX += 2;
    	move_sprite(0, paddleX, 140);

    	if (joypadState & J_A && ballVx == 0) 
    		startBall();

    	if (ballVy != 0) {
	    	
	    	// Check collisions

	    	// Left and Right wall
	    	if (ballX > 160) {
	    		ballVx = -ballVx;
	    		ballX = 160;
	    	} else if (ballX < 8) {
	    		ballVx = -ballVx;
	    		ballX = 8;
	    	}

	    	// Top and bottom
	    	if (ballY > 144+8) {
	    		// You lose
	    		resetBall();
	    	} else if (ballY < 8) {
	    		ballVy = -ballVy;
	    		ballY = 8;
	    	}

	    	// Paddle 
	    	if (checkPaddleCollision()) {
	    		ballVy = -ballVy;
	    	}

	    	// Check block collision
	    	int blockX, blockY;

	    	blockX = ballX / 8;
	    	blockY = ballY / 8;

	    	if (blockX > 0 && blockY > 0) {
	    		uint16_t blockIndex = (blockY * 20 + blockX);
	    		uint8_t block = blockLayout[blockIndex];
	    		
	    		blockLayout[blockIndex] = 0x00;
		    	set_bkg_tiles(blockX, blockY, 1, 1, blankBlockLayout);

	    		// if (block == 0x01) {
	    			
		    	// 	ballVy = -ballVy;
		    	// 	ballVx = -ballVx;
	    		// }
	    	}

	    	ballX += ballVx;
	    	ballY += ballVy;

    	} else {
    		ballX = paddleX;
    	}

    	move_sprite(1, ballX, ballY);

    	while (!(joypad() & J_B)) {}

    	vsync();
    }
}