game.c

#include <allegro5/allegro.h>
#include <allegro5/allegro_primitives.h>
#include <allegro5/allegro_ttf.h>
#include <allegro5/allegro_font.h>

#include <allegro5/allegro_audio.h>
#include <allegro5/allegro_acodec.h>

#include <allegro5/allegro_image.h>

#include <stdio.h>
struct bar{
  int y;
}bar1, bar2;

struct Ball{
	int x;
	int y;
	int v_x;
	int v_y;
}ball;

bool finish = false;
int sc1, sc2;
ALLEGRO_FONT* font;
ALLEGRO_SAMPLE *soundEffect;
ALLEGRO_SAMPLE *soundEffect2;

ALLEGRO_BITMAP* ballpng;
ALLEGRO_BITMAP* bgpng;

void move_ball(){
	ball.x += ball.v_x;
	ball.y += ball.v_y;
	
	if(ball.x<5){
		ball.v_x *= -1;
		sc2++;
		al_play_sample(soundEffect2, 1.0, 0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
	}else if(ball.x>635){
		ball.v_x *= -1;
		sc1++;
		al_play_sample(soundEffect2, 1.0, 0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
	}
	if(ball.y<5 || ball.y>475){
		ball.v_y *= -1;
		al_play_sample(soundEffect, 1.0, 0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
	}
	
}

void draw_ball(){
//	al_draw_circle(ball.x, ball.y, 10, al_map_rgb(0, 0, 0), 10);
	
	// draw bitmap
	al_draw_bitmap(ballpng, ball.x, ball.y, 0);
}

void draw_bg(){
	al_draw_bitmap(bgpng, 0, 0, 0);
}
void draw_bar(){
	// bar1
	al_draw_rectangle(0, bar1.y, 20, bar1.y+100, al_map_rgb(255, 0, 0), 5);
	// bar2
	al_draw_rectangle(620, bar2.y, 640, bar2.y+100, al_map_rgb(255, 0, 0), 5);
}
void keyboard(){
	ALLEGRO_KEYBOARD_STATE state;
	al_get_keyboard_state(&state);
	
	if(al_key_down(&state, ALLEGRO_KEY_UP)){
		bar2.y -= 3;
	}else if(al_key_down(&state, ALLEGRO_KEY_DOWN)){
		bar2.y += 3;
	}
	
	if(al_key_down(&state, ALLEGRO_KEY_A)){
		bar1.y -= 3;
	}else if(al_key_down(&state, ALLEGRO_KEY_Z)){
		bar1.y += 3;
	}
	if(al_key_down(&state, ALLEGRO_KEY_ESCAPE)){
		finish = true;
	}
}

void hit(){
	if(ball.x < 20 && bar1.y < ball.y && ball.y < bar1.y+100 && ball.v_x < 0){
		printf("hit");
		ball.v_x *= -1;
		al_play_sample(soundEffect, 1.0, 0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
	}
	if(ball.x+10 > 620 && bar2.y < ball.y && ball.y < bar2.y+100 && ball.v_x > 0){
		printf("hit");
		ball.v_x *= -1;
		al_play_sample(soundEffect, 1.0, 0, 1.0, ALLEGRO_PLAYMODE_ONCE, 0);
	}
	
}

void drawScore(){
//	char score[4];
//	
//	score[0] = '0' + sc1;
//	score[1] = ':';
//	score[2] = '0' + sc2;
//	score[3] = '\0';
//	
	char score[10];

	sprintf(score, "%d  :  %d", sc1, sc2);
	al_draw_text(font, al_map_rgb(0, 0, 0), 320, 200, ALLEGRO_ALIGN_CENTRE, score);
}


int main(int argc, char **argv) {
	ALLEGRO_DISPLAY* display;
	if(!al_init()){
		return -1;
	}
	display = 	al_create_display(640, 480);
	if(!display){
		return -1;
	}
	// init addon and keyboard
	al_init_primitives_addon();
	al_init_font_addon();
	al_init_ttf_addon();
	al_install_keyboard();
	al_init_acodec_addon();
	al_install_audio();
	al_init_image_addon();
	
	
	// init ball
	ball.x = 30;
	ball.y = 40;
	ball.v_x = 1;
	ball.v_y = 1;
	ballpng = al_load_bitmap("ball.png");
	
	// init font
	font = al_load_ttf_font("font.ttf", 48, 0);
	
	
	// init score
	sc1 = 0;
	sc2 = 0;
	
	// init sound effect
	soundEffect = al_load_sample("effect.wav");
	soundEffect2 = al_load_sample("goal.wav");
	al_reserve_samples(4);
	
	// init bg
	bgpng = al_load_bitmap("bg.png");
	
	
	
	while(!finish){
		al_clear_to_color(al_map_rgb(255, 255, 255));
		
		keyboard();
		hit();
		move_ball();
		printf("%d %d\n", ball.x, ball.y);
		draw_bg();
		draw_ball();
		draw_bar();
		drawScore();
		al_flip_display();
		al_rest(0.001);
	}
	
	
	return 0;
}