/*広告*/

/*ブロックパズルの作り方　中間ソース３*/
/*目次へ戻る*/
#include "DxLib.h"

#define BLOCK_HEIGHT 4
#define BLOCK_WIDTH 4

#define STAGE_HEIGHT 23
#define STAGE_WIDTH 18

#define DRAW_BLOCK_WIDTH 20

void my_init_var(void);
void my_make_block(void);
void my_get_key(void);
void my_move_block(void);
void my_collision_left(void);
void my_collision_right(void);
void my_draw_back(void);
void my_draw_variable(void);
void my_draw_block(void);
void my_draw_stage(void);
void my_fall_block(void);

int block[BLOCK_HEIGHT][BLOCK_WIDTH];
int stage[STAGE_HEIGHT][STAGE_WIDTH];

int blocks[BLOCK_HEIGHT][BLOCK_WIDTH] = {
	{0,0,0,0},
	{0,1,1,0},
	{0,1,1,0},
	{0,0,0,0}
};

int block_x;
int block_y;
float block_y_count;
float block_speed;
int collision_flag;

int Color_Red;
int Color_Black;

int back_img1;

int key[256];

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

	my_init_var();

	while(ProcessMessage() == 0){
		ClearDrawScreen();

		my_make_block();
		my_get_key();
		my_move_block();
		my_draw_back();
		my_draw_variable();
		my_draw_block();
		my_draw_stage();
		my_fall_block();

		if(block_y_count > DRAW_BLOCK_WIDTH * 17){
			block_y_count = 0;
			block_y = 0;
		}

		ScreenFlip();
	}

	DxLib_End();
	return 0;
}

void my_init_var(){
	int i,j;

	for(i=0;i<STAGE_HEIGHT;i++){
		for(j=0;j<STAGE_WIDTH;j++){
			stage[i][0] = 9;
			stage[i][1] = 9;
			stage[i][2] = 9;
			stage[20][j] = 9;
			stage[21][j] = 9;
			stage[22][j] = 9;
			stage[i][15] = 9;
			stage[i][16] = 9;
			stage[i][17] = 9;		
		}
	}

	block_x = 7;
	block_y = 0;
	block_y_count = 0;
	block_speed = 0.5f;
	collision_flag = 0;

	Color_Red = GetColor(255,0,0);
	Color_Black = GetColor(0,0,0);

	back_img1 = LoadGraph("./back_img1.jpg");
}

void my_make_block(){
	int x,y;

	for(y=0;y<BLOCK_HEIGHT;y++){
		for(x=0;x<BLOCK_WIDTH;x++){
			block[y][x] = blocks[y][x];
		}
	}
}

void my_move_block(){
	if(key[KEY_INPUT_LEFT] % 5 == 1){
		my_collision_left();
		if(collision_flag == 0){
			block_x--;
		}
	}

	if(key[KEY_INPUT_RIGHT] % 5 == 1){
		my_collision_right();
		if(collision_flag == 0){
			block_x++;
		}
	}
}

void my_collision_left(){
	int x,y;

	collision_flag = 0;

	for(y=0;y<BLOCK_HEIGHT;y++){
		for(x=0;x<BLOCK_WIDTH;x++){
			if(block[y][x] != 0){
				if(stage[block_y + y][block_x + (x - 1)] != 0){
					collision_flag = 1;
				}
				else if((int)(block_y_count - (block_y * DRAW_BLOCK_WIDTH)) > 0){
					if(stage[block_y + (y + 1)][block_x + (x - 1)] != 0){
						collision_flag = 1;
					}
				}
			}
		}
	}
}

void my_collision_right(){
	int x,y;

	collision_flag = 0;

	for(y=0;y<BLOCK_HEIGHT;y++){
		for(x=0;x<BLOCK_WIDTH;x++){
			if(block[y][x] != 0){
				if(stage[block_y + y][block_x + (x + 1)] != 0){
					collision_flag = 1;
				}
				else if((int)(block_y_count - (block_y * DRAW_BLOCK_WIDTH)) > 0){
					if(stage[block_y + (y + 1)][block_x + (x + 1)] != 0){
						collision_flag = 1;
					}
				}
			}
		}
	}
}

void my_draw_back(){
	DrawGraph(0,0,back_img1,TRUE);
}

void my_draw_variable(){
	DrawFormatString(400,400,Color_Black,"block_x = %d",block_x);
	DrawFormatString(400,420,Color_Black,"block_y = %d",block_y);
	DrawFormatString(400,440,Color_Black,"block_y_count = %f",block_y_count);
}

void my_draw_block(){
	int x,y;

	for(y=0;y<BLOCK_HEIGHT;y++){
		for(x=0;x<BLOCK_WIDTH;x++){
			if(block[y][x] == 1)DrawFormatString(block_x * DRAW_BLOCK_WIDTH + x * DRAW_BLOCK_WIDTH,
				block_y_count + y * DRAW_BLOCK_WIDTH,Color_Red,"■");
		}
	}
}

void my_draw_stage(){
	int x,y;

	for(y=0;y<STAGE_HEIGHT - 2;y++){
		for(x=2;x<STAGE_WIDTH - 2;x++){
			if(stage[y][x] == 1)DrawFormatString(x * DRAW_BLOCK_WIDTH,
				y * DRAW_BLOCK_WIDTH,Color_Red,"■");
			else if(stage[y][x] == 9)DrawFormatString(x * DRAW_BLOCK_WIDTH,
				y * DRAW_BLOCK_WIDTH,Color_Black,"■");
		}
	}
}

void my_fall_block(){
	block_y_count += block_speed;
	block_y = block_y_count / DRAW_BLOCK_WIDTH;
}

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