using System;

namespace BetterUI.Animations;

/// <summary>
/// Animates a component orbiting around a given center point.
/// </summary>
public class OrbitAnimation : AnimationBase
{
	/// <summary>
	/// The radius of the orbit.
	/// </summary>
	[Property]
	public float OrbitRadius { get; set; } = 10f;

	/// <summary>
	/// The center point of the orbit.
	/// </summary>
	[Property]
	public Vector3 OrbitCenter { get; set; } = Vector3.Zero;

	protected override void OnAnimate( float t )
	{
		var easedTime = ApplyEasing( NormalizedTime, Easing );
		var angle = easedTime * MathF.PI * 2;

		var x = OrbitCenter.x + OrbitRadius * MathF.Cos( angle );
		var y = OrbitCenter.y + OrbitRadius * MathF.Sin( angle );

		WorldPosition = new Vector3( x, y, StartPosition.z );
	}
}