Beginner to intermediate level. Most things done with vops to keep it simple but there are some matrix rotations and other things that can be a bit complicated if you are totally new to Houdini
谷歌翻译：
初级到中级。大多数事情都是用 vops 完成的以保持简单，但如果你是 Houdini 的新手，有一些矩阵旋转和其他事情可能会有点复杂
