//transform为null则构建基于场景的粗略测试bvh, 不为null则构建基于对象的精细测试bvh
public BVH(Transform transform, BVHSplitMethod bvhSplitMethod)
{
this.transform = transform;
this.bvhSplitMethod = bvhSplitMethod;
}
//transform为null则构建基于场景的粗略测试bvh, 不为null则构建基于对象的精细测试bvh
public BVH(Transform transform, BVHSplitMethod bvhSplitMethod, int maxPrimsInNode)
{
this.transform = transform;
this.bvhSplitMethod = bvhSplitMethod;
this.maxPrimsInNode = maxPrimsInNode;
}
