Be_full_of_bugs

# include <Siv3D.hpp> // OpenSiv3D v0.1.5

struct Bug
{
	Bug() {}
	Bug(const int& _type) : type(_type) {}
	int	type = Random(4);
	Vec2 p = { -16, Random(Window::Center().y - 120, Window::Center().y + 120) };
	double v = Random(1.0, 2.0);
	Vec2 dv = { 0, 0 };
	double t = 0;
	double h = 1;
};

struct Pom
{
	Vec2 p;
	Vec2 v;
	double t;
};

void Main()
{
	Window::SetTitle(L"Be full of bugs");
	Window::Resize(1280, 720);

	const Vec2 launchPos(Window::Size().x, Window::Size().y);
	const Texture pomTexture(Emoji(L"💣"), TextureDesc::Mipped);
	const Texture popTexture(Emoji(L"💥"), TextureDesc::Mipped);
	const Array<Texture> bugTextures = {
		Texture(Emoji(L"🐛"), TextureDesc::Mipped),
		Texture(Emoji(L"🕷"), TextureDesc::Mipped),
		Texture(Emoji(L"🐜"), TextureDesc::Mipped),
		Texture(Emoji(L"🐍"), TextureDesc::Mipped),
		Texture(Emoji(L"🐝"), TextureDesc::Mipped),
	};
	const PerlinNoise noise(Random(Largest<uint32>()));
	const Texture ground(Image(Window::Size(), Arg::generator = [&noise](Point p) {
		return Palette::Green
			.lerp(Palette::Darkgreen, Min(1.0, Max(0.0, 0.5 + 0.5*noise.octaveNoise(Vec2(p.x, p.y * 2)*0.1, 4))))
			.lerp(Palette::Khaki, Min(1.0, Max(0.0, 0.4 + 0.3*noise.octaveNoise(Vec2(p.x, p.y * 2)*0.01, 4))))
			.lerp(Palette::Khaki, Min(0.5, Max(0.0, 0.8 - abs(p.y - Window::Center().y) / double(Window::Center().y))));
	}));
	const Font font1(128, Typeface::Bold, FontStyle::Italic);

	Array<Bug> bugs;
	Array<Pom> poms;
	Vec2 tv;
	double health = 1.0;
	Color gColor(Palette::Darkred, 0);
	int timer = 1800;
	int score = 0;

	while (System::Update())
	{
		//時間の処理
		timer--;

		//バグの追加
		if (timer < 0) bugs.emplace_back(5);
		else if (RandomBool(0.1)) bugs.emplace_back();

		//地面の描画
		ground.draw();

		//バグの更新
		for (auto& b : bugs)
		{
			b.p += b.dv;
			b.dv *= 0.8;
			switch (b.type)
			{
			case 0:	//ムカデ
				if (RandomBool(0.01)) b.dv = RandomVec2(10);
				b.t += 0.2;
				b.p.x += b.v;
				bugTextures[0].resize(32).mirror().rotate(0.78 + sin(b.t)*0.20).drawAt(b.p);
				break;
			case 1:	//スパイダー
				b.t = fmod(b.t + 1.0, 120);
				if (b.t < 30) b.p += Vec2(b.v * 2, 0).rotated(-0.2);
				if (60 < b.t&& b.t < 90) b.p += Vec2(b.v * 2, 0).rotated(0.2);
				if (b.t < 60) bugTextures[1].resize(32).rotate(1.57 - 0.2).drawAt(b.p);
				else bugTextures[1].resize(32).rotate(1.57 + 0.2).drawAt(b.p);
				break;
			case 2:	//アリ
				b.p.x += b.v;
				bugTextures[2].resize(32).mirror().drawAt(b.p);
				break;
			case 3:	//スネーク
				b.t += 0.1;
				b.p.x += 2 * b.v*(1 + sin(b.t));
				bugTextures[3].resize(32).mirror().drawAt(b.p);
				break;
			case 4:	//ハチ
				b.t += 0.2;
				b.p.x += b.v * 2;
				b.p.y += sin(b.t) * 2;
				bugTextures[4].resize(32).mirror().drawAt(b.p);
				break;
			case 5: //スーパームカデ
				b.t = fmod(1.0 + b.t, 60.0);
				b.p.x += b.v * 5;
				if (b.t < 15) bugTextures[0].resize(48).mirror().rotate(0.78 + sin(b.t)*0.20).drawAt(b.p.movedBy(0, -sin(3.14*b.t / 15.0) * 32), Palette::Red);
				else bugTextures[0].resize(48).mirror().rotate(0.78 + sin(b.t)*0.20).drawAt(b.p, Palette::Red);
				break;
			}

			//ヘルスバー
			Line(-12, -12, 12, -12).movedBy(b.p).draw(4, Palette::Red);
			Line(-12, -12, -12 + 24 * b.h, -12).movedBy(b.p).draw(4, Palette::Green);
		}


		//爆弾の発射
		if (Window::ClientRect().mouseOver() && health > 0 && System::FrameCount() % 15 == 0)
			poms.push_back({ launchPos, ((Cursor::PosF() - launchPos) / 60.0).movedBy(RandomVec2(Random(1.5))).movedBy(0,-15), 60.0 });

		//爆弾の更新
		for (auto& p : poms)
		{
			if (p.t > 0)
			{
				p.p += p.v;
				p.v.y += 0.5;
				pomTexture.resize(48).drawAt(p.p);
			}
			else if (p.t > -60)
			{
				pomTexture.resize(48).drawAt(p.p);
				Circle(p.p.movedBy(5, 5), 8).drawArc(0, 6.28*p.t / 60.0, 2, 2, Palette::Red);
			}
			else
			{
				pomTexture.resize(48).drawAt(p.p, ColorF(1.0, (p.t + 60) / 5.0 + 1.0));
				popTexture.resize((-p.t - 60) * 15).drawAt(p.p, ColorF(1.0, (p.t + 60) / 5.0 + 2.0));
			}
			p.t -= 1.0;
		}

		//爆発の削除
		poms.remove_if([&bugs](const Pom& p) {
			if (p.t > -70) return false;
			for (auto& b : bugs) if (p.p.distanceFrom(b.p) < 150) { b.h -= 75 / p.p.distanceFrom(b.p); b.dv += (b.p - p.p).normalized()*10.0; }
			return true;
		});

		//バグの削除
		bugs.remove_if([&tv, &health, &score](const Bug& b) {
			if (b.p.x >= Window::Size().x + 16)
			{
				tv += RandomVec2(10);
				health = Max(0.0, health - 0.01);
				return true;
			}
			if (b.h <= 0)
			{
				score++;
				return true;
			}
			return false;
		});

		//ヘルスバーの表示
		{
			tv = tv.rotated(Random(6.28))*0.9;
			const Transformer2D t1(Mat3x2::Translate(tv));
			RectF(Window::Size().x, 32).draw(Palette::Red).drawFrame(3, 0, Palette::Black);
			RectF(Window::Size().x*health, 32).draw(Palette::Green).drawFrame(3, 0, Palette::Black);
		}

		//残り時間の表示
		if (timer >= 0)
		{
			font1(L"time:", timer / 60, L"s").drawAt(Window::Center().movedBy(0, -240), HSV(timer, 0.5, 0.3));
		}

		//ゲームオーバー時
		if (health == 0)
		{
			gColor.a = Min(255, int(gColor.a) + 2);
			Window::ClientRect().draw(Color(0, gColor.a / 2));
			for (int i = 32; i >= 0; --i)
			{
				const Transformer2D t(Mat3x2::Translate(0, i));
				const Color color = i == 0 ? Color(Palette::White, gColor.a/2) : Color(Palette::Red, (gColor.a*(128 - i * 4) / 255));
				font1(L"Game Over").drawAt(Window::Center().movedBy(0, 64 - gColor.a / 4 - 72), color);
				font1(L"Score {}"_fmt(score)).drawAt(Window::Center().movedBy(0, 64 - gColor.a / 4 + 72), color);
			}
		}
	}

}