# include <Siv3D.hpp> // OpenSiv3D v0.6.10

const int heroSize{ 100 };
const int enemySize{ 80 };


enum direction
{
	UP, LEFT, DOWN, RIGHT, NONE
};

direction GetDirection()
{
	if ((KeyUp | KeyW).pressed())
	{
		return UP;
	}
	else if ((KeyLeft | KeyA).pressed())
	{
		return LEFT;
	}
	else if ((KeyDown | KeyS).pressed())
	{
		return DOWN;
	}
	else if ((KeyRight | KeyD).pressed())
	{
		return RIGHT;
	}
	else
		return NONE;
}

void UpdatePlayer(Point& _pos)
{
	const int SPEED{ 3 };
	direction d = GetDirection();
	Point moveDir{ 0,0 };

	switch (d)
	{
	case LEFT:
		moveDir = { -1, 0 };
		break;
	case RIGHT:
		moveDir = { 1, 0 };
		break;
	case UP:
		moveDir = { 0, -1 };
		break;
	case DOWN:
		moveDir = { 0,  1 };
		break;
	default:
		return;
	}
	//これも関数化しちゃった方がすっきりするかもねぇ
	_pos = _pos + SPEED * moveDir;

}

void SetHeroRect(Rect& _rect, Point _pos)
{
	Point heroHosei{ heroSize / 2, heroSize / 2 };
	_rect = { _pos - heroHosei, {heroSize, heroSize } };
}


bool IsRectIntersectsOtherRect(Rect _rectA, Rect _rectB)
{
自分で作った奴使ってね。
}

void Main()
{

	const Texture hero{ U"🕺"_emoji };
	const Texture enemy{ U"🐲"_emoji };

	Point heroPos{ 50,50 };
	Point enemyPos{ Scene::Center() };
	Point heroHosei{ heroSize / 2, heroSize / 2 };
	Point enemyHosei{ enemySize / 2, enemySize / 2 };
	Rect heroRect{ heroPos - heroHosei, {heroSize, heroSize} };
	Rect enemyRect{ Scene::Center()-enemyHosei, {enemySize, enemySize} };


	while (System::Update())
	{
		Scene::SetBackground(Palette::Lightgray);
		UpdatePlayer(heroPos);
		SetHeroRect(heroRect, heroPos);
		hero.resized(heroSize).drawAt(heroPos);
		if (IsRectIntersectsOtherRect(heroRect, enemyRect))
		{
			heroRect.draw({Palette::Yellow, 0.5});
			heroRect.drawFrame(1, 1, Palette::Red);
		}
		else
			heroRect.drawFrame(1, 1, Palette::Red);
		enemy.resized(enemySize).drawAt(enemyPos);
		enemyRect.drawFrame(1, 1, Palette::Red);



	}
}