As first assumption, there are geoA for amination object and curveA for animation path.
I try Follow Path animation. As you know,the position of geoA is decided by the parameter of “Position” in Transform Tab. Then how can I seek the world position from “Position” parameter? I want to relate up vector of geoA and it's world position.
you can also try ‘vorigin’ expression function. You learn more about it in Help > Houdini Help and then going to the Expressions page (in the Reference column) and finding the link to the vorigin help page.
I was shown a way to approximate this using the object merge sop to evaluate a geometry in local space (as long as no transform happens afterwards it is equivalent to global space).
Hello,Photex. Thank you your idea of using object merge.It works well. For more detail I searched all your posts with the keywords of “object merge”, “global space”,“photex”! ,but can't find. So please show your post for this topics.