public static void TransformationRotation(List <TriMesh.Vertex> vertice, Vector3D rotation, bool local) { Vector3D center = Vector3D.Zero; Matrix4D m = Matrix4D.Identity(); if (local) { center = TriMeshUtil.GetCenter(vertice); Matrix4D moveC = ComputeMatrixMove(ref center); center.Negate(); Matrix4D moveCReverse = ComputeMatrixMove(ref center); Matrix4D r = ComputeMatrixRotation(rotation); m = moveCReverse * r * moveC; } else { m = ComputeMatrixRotation(rotation); } TransformationVertex(vertice, m); }