Exemple #1
0
        /// <summary>
        /// 空间中一个点在一个面上的投影点
        /// </summary>
        /// <param name="face"></param>
        /// <param name="point"></param>
        /// <returns></returns>
        public static Vector3 ProjectPointOnPlane(Face face, Vector3 point)
        {
            float num = Math3d.SignedDistancePlanePoint(face, point);

            num *= -1f;
            Vector3 b = Math3d.SetVectorLength(face.normal, num);

            return(point + b);
        }
Exemple #2
0
        /// <summary>
        /// 线面是否相交
        /// </summary>
        /// <param name="intersection">交点</param>
        /// <param name="linePoint"></param>
        /// <param name="lineVec"></param>
        /// <param name="face"></param>
        /// <returns>是否相交</returns>
        public static bool LinePlaneIntersection(Vector3 linePoint, Vector3 lineVec, Face face, out Vector3 intersection)
        {
            intersection = Vector3.zero;
            float num  = Vector3.Dot(face.point - linePoint, face.normal);
            float num2 = Vector3.Dot(lineVec, face.normal);

            if (num2 != 0f)
            {
                float   size = num / num2;
                Vector3 b    = Math3d.SetVectorLength(lineVec, size);
                intersection = linePoint + b;
                return(true);
            }
            return(false);
        }