SimpleAnimationを視る

simpleanimation.cpp

# include <Siv3D.hpp> // OpenSiv3D v0.6.0

void Main()
{
	Scene::SetBackground(ColorF{ 0, 0, 0 });

	Font font{ 16 };

	SimpleAnimation anim;
	anim.setLoop(5s)
		.set(U"value", { 0s, 0 }, { 2s, 0.5 }, EaseInOutCubic)
		.set(U"value", { 2.5s, 0.5 }, { 3.5s, 1.0 }, EaseInOutSine)
		.set(U"value", { 3.75s, 1.0 }, { 4.99s, 0 }, EaseInOutCubic)
		.start();

	while (System::Update())
	{
		const SizeF graphSize{ 300, 300 };
		const Vec2 graphPos = Scene::Size() / 2 - graphSize / 2;

		RectF{ graphPos, graphSize }.drawFrame();

		const double x = anim.posSec() / 5.0 * graphSize.x + graphPos.x;
		const double y = (1.0 - anim[U"value"]) * graphSize.y + graphPos.y;

		Line{ x, graphPos.y, x, graphPos.y + graphSize.y }.draw(LineStyle::SquareDot, 1);
		Line{ graphPos.x, y, graphPos.x + graphSize.x, y }.draw(LineStyle::SquareDot, 1);

		font(U"{:.1f}"_fmt(anim.posSec())).drawAt(x, graphPos.y + graphSize.y + 16);
		font(U"{:.1f}"_fmt(anim[U"value"])).drawAt(graphPos.x - 24, y);

		Circle{ Vec2{ x, y }, 10 }.draw();
	}
}