using Engine.Core;

namespace Engine.Physics2D;

public class Collider2DCircle : Collider2DBase, ICircleCollider2D
{
    public Circle CircleWorld { get; protected set; } = Circle.UnitCircle;
    public Circle CircleLocal
    {
        get;
        set
        {
            field = value;
            NeedsRecalculation = true;
        }
    } = Circle.UnitCircle;

    private float area = 0f; public override float Area => area;
    private float geometricInertia = 0f; public override float GeometricInertia => geometricInertia;

    public override void CalculateCollider()
    {
        CircleWorld = Transform.Transform(CircleLocal);
        area = CircleWorld.Area;
        geometricInertia = CircleWorld.GeometricInertia;
    }

    public Collider2DCircle() { }
    public Collider2DCircle(Circle circle) => CircleLocal = circle;
}