using StgSharp.Math;
using System.Numerics;

namespace StgSharp.Geometries
{
    public class Rectangle : Polygon4
    {
        internal Point center;

        public sealed override Point RefPoint0 => center;

        public sealed override Point RefPoint1 => new Point(vertexMat.transpose.colum0);

        public sealed override Point RefPoint2 => new Point(vertexMat.transpose.colum1);

        public Rectangle(
            float v0x, float v0y, float v0z,
            float v1x, float v1y, float v1z,
            float v2x, float v2y, float v2z,
            float v3x, float v3y, float v3z
            )
        {
            vertexMat.mat.colum0 = new Vector4(v0x, v0y, v0z, 0);
            vertexMat.mat.colum1 = new Vector4(v1x, v1y, v1z, 0);
            vertexMat.mat.colum2 = new Vector4(v2x, v2y, v2z, 0);
            vertexMat.mat.colum3 = new Vector4(v3x, v3y, v3z, 0);
        }



        /// <summary>
        /// 计算中心点相对于参考原点的位移
        /// </summary>
        /// <param name="tick">当前游戏刻</param>
        /// <returns></returns>
        public virtual Vec3d MovCenter(uint tick) => default(Vec3d);

        public sealed override Vec3d MoveVertex2(uint tick)
        {
            return
                new Vec3d(this.center.position.vec * 2 - vertexMat.mat.colum0);
        }

        public sealed override Vec3d MoveVertex3(uint tick)
        {
            return
                new Vec3d(this.center.position.vec * 2 - vertexMat.mat.colum1);
        }

        internal sealed override void OnRender(uint tick)
        {
            tick -= bornTick;
            this.MovCenter(tick);
        }

    }
}