You can get the tangent and binormal at each corner of a face of a MFnMesh. Those are based on the UV directions. You would have to choose one, or interpolate for a position in the middle of a face.
On Wednesday, 21 November 2018 00:54:52 UTC+11, Angelo wrote: > > I recommend you get Chad Vernon's "Applied 3d Math" video tutorial found > here > <https://www.cgcircuit.com/course/applied-3d-math?affid=084fa76a5ad4e37ee02f0fb98fd229b4ed900c0c1aea6f5ba4e330927a0d65f606af5a9ebad4b731f8b6036fa27758765636bec02ae95f3f30765a390979b9c6> > . > > It goes over how to construct rotation from 3 points (basically a rivet). > > On Tue, Nov 20, 2018 at 2:07 AM Zhen Huang <qeej...@gmail.com > <javascript:>> wrote: > >> Seems a good idea , are you mind introduce more please . Thanks . >> >> I found the MFnMesh updated a lot , there is a getPointAtUV method . >> Position solved . >> >> How about rotation , any idea ? >> >> Normal can get from interpolation of 3 points normal . >> Tangent should base on UV , have no idea yet . >> >> 在 2018年11月19日星期一 UTC+8下午10:30:17，Angelo写道： >>> >>> Why not just use MFnMesh.getPoint? Build an orthonormal coordinate using >>>> connected points. >>> >>> -- >> You received this message because you are subscribed to the Google Groups >> "Python Programming for Autodesk Maya" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to python_inside_maya+unsubscr...@googlegroups.com <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/python_inside_maya/fd0ea781-6f68-4574-a9cb-ca7fb32bbbc2%40googlegroups.com >> >> <https://groups.google.com/d/msgid/python_inside_maya/fd0ea781-6f68-4574-a9cb-ca7fb32bbbc2%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> For more options, visit https://groups.google.com/d/optout. >> > -- You received this message because you are subscribed to the Google Groups "Python Programming for Autodesk Maya" group. To unsubscribe from this group and stop receiving emails from it, send an email to python_inside_maya+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/python_inside_maya/9929dee8-8ecd-4c76-a49a-531cd9720a76%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
