/*
 * @FileName: LMath.LVector.cs
 * @Date: 2024-04-20 20:06:15
 * @LastEditTime: 2024-04-22 22:58:25
 * @Description: 定点数向量计算相关数学方法
 */

namespace JNGame.Math
{
    public static partial class LMath
    {
        public static LVector3 Transform(ref LVector3 point, ref LVector3 axis_x, ref LVector3 axis_y, ref LVector3 axis_z,
            ref LVector3 trans)
        {
            return new LVector3(true,
                ((axis_x.RawX * point.RawX + axis_y.RawX * point.RawY + axis_z.RawX * point.RawZ) / LFloat.Precision) + trans.RawX,
                ((axis_x.RawY * point.RawX + axis_y.RawY * point.RawY + axis_z.RawY * point.RawZ) / LFloat.Precision) + trans.RawY,
                ((axis_x.RawZ * point.RawX + axis_y.RawZ * point.RawY + axis_z.RawZ * point.RawZ) / LFloat.Precision) + trans.RawZ);
        }

        public static LVector3 Transform(LVector3 point, ref LVector3 axis_x, ref LVector3 axis_y, ref LVector3 axis_z,
            ref LVector3 trans)
        {
            return new LVector3(true,
                ((axis_x.RawX * point.RawX + axis_y.RawX * point.RawY + axis_z.RawX * point.RawZ) / LFloat.Precision) + trans.RawX,
                ((axis_x.RawY * point.RawX + axis_y.RawY * point.RawY + axis_z.RawY * point.RawZ) / LFloat.Precision) + trans.RawY,
                ((axis_x.RawZ * point.RawX + axis_y.RawZ * point.RawY + axis_z.RawZ * point.RawZ) / LFloat.Precision) + trans.RawZ);
        }

        public static LVector3 Transform(ref LVector3 point, ref LVector3 axis_x, ref LVector3 axis_y, ref LVector3 axis_z,
            ref LVector3 trans, ref LVector3 scale)
        {
            long num = (long) point.RawX * (long) scale.RawX /LFloat.Precision;
            long num2 = (long) point.RawY * (long) scale.RawX/LFloat.Precision;
            long num3 = (long) point.RawZ * (long) scale.RawX/LFloat.Precision;
            return new LVector3(true,
                (int) (((long) axis_x.RawX * num + (long) axis_y.RawX * num2 + (long) axis_z.RawX * num3) /LFloat.Precision) +
                trans.RawX,
                (int) (((long) axis_x.RawY * num + (long) axis_y.RawY * num2 + (long) axis_z.RawY * num3) /LFloat.Precision) +
                trans.RawY,
                (int) (((long) axis_x.RawZ * num + (long) axis_y.RawZ * num2 + (long) axis_z.RawZ * num3) /LFloat.Precision) +
                trans.RawZ);
        }

        public static LVector3 Transform(ref LVector3 point, ref LVector3 forward, ref LVector3 trans)
        {
            LVector3 up = LVector3.Up;
            LVector3 vInt = Cross(LVector3.Up, forward);
            return LMath.Transform(ref point, ref vInt, ref up, ref forward, ref trans);
        }

        public static LVector3 Transform(LVector3 point, LVector3 forward, LVector3 trans)
        {
            LVector3 up = LVector3.Up;
            LVector3 vInt = Cross(LVector3.Up, forward);
            return LMath.Transform(ref point, ref vInt, ref up, ref forward, ref trans);
        }

        public static LVector3 Transform(LVector3 point, LVector3 forward, LVector3 trans, LVector3 scale)
        {
            LVector3 up = LVector3.Up;
            LVector3 vInt = Cross(LVector3.Up, forward);
            return LMath.Transform(ref point, ref vInt, ref up, ref forward, ref trans, ref scale);
        }

        public static LVector3 MoveTowards(LVector3 from, LVector3 to, LFloat dist)
        {
            LFloat sqrtMagnitude = (to - from).SqrMagnitude;
            LFloat sprtDist = dist * dist;
            if (sqrtMagnitude <= sprtDist)
            {
                return to;
            }
            LFloat f = sprtDist / sqrtMagnitude;
            return LVector3.Lerp(from, to, f);
        }

        /// <summary>
        /// 方向向量转角度
        /// </summary>
        /// <param name="vec"></param>
        /// <returns></returns>
        public static LFloat ToDeg(this in LVector2 vec)
        {
            var ccwDeg = LMath.Atan2(vec.y, vec.x) * LMath.Rad2Deg;
            var deg = 90 - ccwDeg;
            var rawVal = deg.rawValue % ((LFloat)360).rawValue;
            return new LFloat(true, rawVal);
        }

        public static LFloat AngleInt(LVector3 lhs, LVector3 rhs)
        {
            return LMath.Acos(Dot(lhs, rhs));
        }

        public static LFloat Dot(in LVector2 u, in LVector2 v)
        {
            return LVector2.Dot(u, v);
        }

        public static LFloat Cross(in LVector2 u, in LVector2 v)
        {
            return LVector2.Cross(u, v);
        }

        public static LVector2 Lerp(in LVector2 from, in LVector2 to, in LFloat f)
        {
            return LVector2.Lerp(from, to, f);
        }

        public static LFloat Dot(in LVector3 u, in LVector3 v)
        {
            return LVector3.Dot(u, v);
        }

        public static LVector3 Cross(in LVector3 u, in LVector3 v)
        {
            return LVector3.Cross(u, v);
        }
        
        public static LVector3 Lerp(in LVector3 from, in LVector3 to, in LFloat f)
        {
            return LVector3.Lerp(from, to, f);
        }
    }
}