package net.minecraft.util;

public class BinaryAnimator {
	private final int animationLength;
	private final EasingType easing;
	private int ticks;
	private int ticksOld;

	public BinaryAnimator(final int animationLength, final EasingType easing) {
		this.animationLength = animationLength;
		this.easing = easing;
	}

	public BinaryAnimator(final int animationLength) {
		this(animationLength, EasingType.LINEAR);
	}

	public void tick(final boolean active) {
		this.ticksOld = this.ticks;
		if (active) {
			if (this.ticks < this.animationLength) {
				this.ticks++;
			}
		} else if (this.ticks > 0) {
			this.ticks--;
		}
	}

	public float getFactor(final float partialTicks) {
		float factor = Mth.lerp(partialTicks, (float)this.ticksOld, (float)this.ticks) / this.animationLength;
		return this.easing.apply(factor);
	}
}