//计算三角形三个顶点的裁剪空间的坐标
void CalTriangleScreenSpacePos(HTriangle Triangle)
{
//顶点的其他数据
Triangle.p1InScreenSpace = Triangle.p1InObjectSpace.Copy();
Triangle.p2InScreenSpace = Triangle.p2InObjectSpace.Copy();
Triangle.p3InScreenSpace = Triangle.p3InObjectSpace.Copy();
//归一化然后乘宽高
Triangle.p1InScreenSpace.pos = Transform.HomogenizeToScreenCoord(Triangle.p1InClipSpace.pos);
Triangle.p2InScreenSpace.pos = Transform.HomogenizeToScreenCoord(Triangle.p2InClipSpace.pos);
Triangle.p3InScreenSpace.pos = Transform.HomogenizeToScreenCoord(Triangle.p3InClipSpace.pos);
//保存Z信息
Triangle.p1InScreenSpace.pos.w = Triangle.p1InClipSpace.pos.w;
Triangle.p2InScreenSpace.pos.w = Triangle.p2InClipSpace.pos.w;
Triangle.p3InScreenSpace.pos.w = Triangle.p3InClipSpace.pos.w;
}