/*広告*/

/*ブロック崩しの作り方　完成ソース*/
/*目次へ戻る*/
#include "DxLib.h"

#define BALL_SIZE 5
#define BALL_SPEED 5
#define BAR_SPEED 5
#define BAR_WIDTH 50
#define BAR_HEIGHT 10
#define BLOCK_WIDTH 50
#define BLOCK_HEIGHT 10
#define COLLISION_SIZE 3
#define MAX_BLOCK 36
#define BLOCK_MAP_INDEX_X 6
#define BLOCK_MAP_INDEX_Y 6
#define FIELD_WIDTH 300
#define FIELD_HEIGHT 480
#define X_POSI 170

void my_init_variable(void);
void my_init_blocks(void);
void my_op(void);
void my_ed(void);
void my_gameover(void);
void my_move_bar(void);
void my_move_ball(void);
void my_collision_detection(void);
void my_count_block(void);
void my_draw_back(void);
void my_draw_score_box(void);
void my_draw_ball(void);
void my_draw_bar(void);
void my_draw_block(void);
void my_draw_field(void);
int my_get_key(void);

struct BLOCKS{
	int x;
	int y;
	int flag;
	int color;
};

struct BLOCKS blocks[MAX_BLOCK];

int block_map[BLOCK_MAP_INDEX_Y][BLOCK_MAP_INDEX_X] = {
	{1,2,3,1,2,3},
	{2,3,1,2,3,1},
	{3,1,2,3,1,2},
	{1,2,3,1,2,3},
	{2,3,1,2,3,1},
	{3,1,2,3,1,2}
};

int game_state;
int bar_x;
int bar_y;
int ball_x;
int ball_y;
int x_speed;
int y_speed;
int score;
int Color_White;
int Color_Black;
int Color_Red;
int Color_Green;
int Color_Blue;

/*背景画像用変数*/
int back_img;

int key[256];

int WINAPI WinMain(HINSTANCE, HINSTANCE, LPSTR, int){
	ChangeWindowMode(TRUE);
	DxLib_Init();
	SetDrawScreen(DX_SCREEN_BACK);

	my_init_variable();
	my_init_blocks();

	while (ScreenFlip()==0 && ProcessMessage()==0
		 && ClearDrawScreen()==0 && my_get_key()==0){

		switch(game_state){
		case 0:
			my_draw_back();
			my_draw_ball();
			my_draw_bar();
			my_draw_block();
			my_draw_field();
			my_op();
			if(key[KEY_INPUT_RETURN] == 1){
				game_state = 5;
			}
			break;
		case 5:
			my_move_bar();
			my_move_ball();
			my_collision_detection();
			my_count_block();
			my_draw_back();
			my_draw_score_box();
			my_draw_ball();
			my_draw_bar();
			my_draw_block();
			my_draw_field();
			break;
		case 10:
			my_draw_back();
			my_draw_score_box();
			my_draw_bar();
			my_draw_block();
			my_draw_field();
			my_gameover();
			break;
		case 15:
			my_draw_back();
			my_draw_score_box();
			my_draw_bar();
			my_draw_block();
			my_draw_field();
			my_ed();
			break;
		default:
			break;
		}
	}
	DxLib_End();
	return 0;
}

void my_init_variable(){
	game_state = 0;
	bar_x = 0;
	bar_y = FIELD_HEIGHT - BAR_HEIGHT;
	ball_x = BAR_WIDTH / 2;
	ball_y = (FIELD_HEIGHT - BAR_HEIGHT) - BALL_SIZE;
	x_speed = BALL_SPEED;
	y_speed = BALL_SPEED;
	score = 0;
	Color_White = GetColor(255,255,255);
	Color_Black = GetColor(0, 0, 0);
	Color_Red = GetColor(255,0,0);
	Color_Green = GetColor(0,255,0);
	Color_Blue = GetColor(0, 0, 255);

	/*背景画像読み込み*/
	/*初期化時に一度読み込めば大丈夫です*/
	back_img = LoadGraph("./back_img.jpg");
}

void my_init_blocks(){
	int i, j;
	int count = 0;
	for (i = 0; i < BLOCK_MAP_INDEX_Y; i++){
		for (j = 0; j < BLOCK_MAP_INDEX_X; j++){
			if (block_map[i][j] != 0){
				blocks[count].x = (BLOCK_WIDTH * j);
				blocks[count].y = (BLOCK_HEIGHT * i);
				blocks[count].flag = 1;
				switch (block_map[i][j]){
				case 1:
					blocks[count].color = Color_Red;
					break;
				case 2:
					blocks[count].color = Color_Green;
					break;
				case 3:
					blocks[count].color = Color_Blue;
					break;
				default:
					break;
				}
			}
			count++;
		}
	}
}

/*オープニング*/
void my_op(){
	DrawFormatString(220, 210, Color_White, "ＴＨＥ　ＢＲＥＡＫＯＵＴ");
	DrawFormatString(210, 230, Color_White, "press enter key to start");
}

void my_ed(){
	DrawFormatString(245, 210, Color_White, "Congratulations!!!");
}

void my_gameover(){
	DrawFormatString(280,240,Color_White,"GAME OVER");
}

void my_move_ball(){
	ball_x += x_speed;
	ball_y += y_speed;
}

void my_move_bar(){
	if (key[KEY_INPUT_RIGHT] > 0 && (bar_x + BAR_WIDTH) < FIELD_WIDTH){
		bar_x += BAR_SPEED;
	}
	if (key[KEY_INPUT_LEFT] > 0 && bar_x > 0){
		bar_x -= BAR_SPEED;
	}
}

void my_collision_detection(){
	int count = 0;

	if(ball_x >= FIELD_WIDTH){
		ball_x = FIELD_WIDTH - BALL_SIZE;
		x_speed *= -1;
	}
	if(ball_x <= 0){
		ball_x = BALL_SIZE;
		x_speed *= -1;
	}
	if(ball_y <= 0){
		ball_y = BALL_SIZE;
		y_speed *= -1;
	}
	if(ball_y >= FIELD_HEIGHT){
		game_state = 10;
	}
	if(ball_x > bar_x && ball_x < (bar_x + BAR_WIDTH) && ball_y >= bar_y){
		ball_y = bar_y - BALL_SIZE;
		y_speed *= -1;
	}
	for (count = 0;count < MAX_BLOCK;count++){
		if(blocks[count].flag == 1){
			if (ball_x >= blocks[count].x && ball_x <= blocks[count].x + BLOCK_WIDTH){
				if (ball_y >= blocks[count].y && ball_y <= blocks[count].y + COLLISION_SIZE){
					ball_y = blocks[count].y;
					y_speed *= -1;
					blocks[count].flag = 0;
					score++;
					break;
				}
				else if (ball_y <= blocks[count].y + BLOCK_HEIGHT && ball_y >= blocks[count].y + BLOCK_HEIGHT - COLLISION_SIZE){
					ball_y = blocks[count].y + BLOCK_HEIGHT;
					y_speed *= -1;
					blocks[count].flag = 0;
					score++;
					break;
				}
			}

			if (ball_y >= blocks[count].y && ball_y <= blocks[count].y + BLOCK_HEIGHT){
				if (ball_x >= blocks[count].x && ball_x <= blocks[count].x + COLLISION_SIZE){
					ball_x = blocks[count].x;
					x_speed *= -1;
					blocks[count].flag = 0;
					score++;
					break;
				}
				else if (ball_x <= blocks[count].x + BLOCK_WIDTH && ball_x >= blocks[count].x + BLOCK_WIDTH - COLLISION_SIZE){
					ball_x = blocks[count].x + BLOCK_WIDTH;
					x_speed *= -1;
					blocks[count].flag = 0;
					score++;
					break;
				}
			}
		}
	}
}

void my_count_block(){
	int count;

	for (count = 0;count < MAX_BLOCK;count++){
		if(blocks[count].flag == 1){
			break;
		}
	}
	if(count == MAX_BLOCK){
		game_state = 15;
	}
}


/*背景画像表示*/
void my_draw_back(){
	DrawGraph(0, 0, back_img, TRUE);
}

/*スコアボックス表示*/
void my_draw_score_box(){
	DrawFormatString(500,20,Color_White,"■BREAKOUT■");
	DrawFormatString(525,60,Color_White,"STAGE");
	DrawFormatString(545,80,Color_White,"1");
	DrawFormatString(525,100,Color_White,"SCORE");
	DrawFormatString(545,120,Color_White,"%d",score);
}

void my_draw_ball(){
	DrawCircle(X_POSI + ball_x,ball_y,BALL_SIZE,Color_White,false);
}

void my_draw_bar(){
	DrawBox(X_POSI + bar_x,bar_y,X_POSI + bar_x + BAR_WIDTH,bar_y + BAR_HEIGHT,Color_Red,true);
}

void my_draw_block(){
	int count = 0;

	for (count = 0;count < MAX_BLOCK;count++){
		if (blocks[count].flag == 1){
			DrawBox(X_POSI + blocks[count].x,blocks[count].y,X_POSI + blocks[count].x + BLOCK_WIDTH,
				blocks[count].y + BLOCK_HEIGHT,blocks[count].color,true);
			DrawBox(X_POSI + blocks[count].x,blocks[count].y,X_POSI + blocks[count].x + BLOCK_WIDTH,
				blocks[count].y + BLOCK_HEIGHT,Color_Black, false);
		}
	}
}

void my_draw_field(){
	DrawBox(X_POSI + 0,0,X_POSI + FIELD_WIDTH,FIELD_HEIGHT,Color_White,false);
}

int my_get_key(){
	char keys[256];
	GetHitKeyStateAll(keys);
	for (int i = 0; i < 256; i++){
		if (keys[i] != 0){
			key[i]++;
		}
		else{
			key[i] = 0;
		}
	}
	return 0;
}
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