Every shape relief draws, grouped by what it is about rather than by how it looks — because that is how you arrive here. You have a question, not a preference for trees over tables. Each entry links to the page it lives on.relief 能画的全部形状，按讲什么分组，不按长什么样分 —— 因为人是这么找过来的。你带着一个问题，不是带着「我想要棵树不想要张表」。每一条都链到它所在的那一页。
__packedstruct tp_cfg · 加不加 __packedunion tp_arg · all four start at byte 0union tp_arg · 四个都从第 0 字节开始Ask what the reader will do with the answer. A figure that shows containment answers "what goes away with what"; one that shows order answers "what happens next"; one that shows an interval answers "when is it unsafe". Most wrong diagrams are the right picture of the wrong one of those three.先问读者拿到答案要干什么。画包含的图回答「关掉这个会连带关掉谁」；画顺序的回答「下一步发生什么」；画区间的回答「什么时候是不安全的」。大多数画错的图，是把这三样里选错的那一样画对了。