It does the opposite. Any MFn* class is called a “function set”, and contains functions you can use for a particular type of Maya object. Like mesh-related functions in MFnMesh. But MPx* classes are things that you the developer implement to provide Maya with data. In this case, the closestPoint function is what you implement to give Maya some idea of where the closest point is on your custom node. Your custom node could, for example, be a mesh that you generate and draw yourself. Something Maya normally does not know about or know how to query. The closestPoint method is a way for you to give Maya that missing information; presumably it would use that when snapping a Maya manipulator or pivot to a point on that custom node.
As for a quicker alternative, there are other mesh-related tools for finding points, such as MFnMesh::getClosestPoint, that has different performance/feature tradeoffs. On Thu, 6 Apr 2023 at 10:49, - Im3dJoe - Polygon Lab <ty55...@gmail.com> wrote: > > I use MFnMesh.closestIntersection a lot to get the closest point on a mesh, > > but I found it very slow to a dense mesh, > > I have been told that Quaddraw use MPxSurfaceShape::closestPoint to snap > point on the gpucache, but I can not find any example of how to use it, > > would anyone show me a hint? > > cheers > Joe > > > -- > 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/931c1e30-1a92-4095-9e99-8b3bbca80cf8n%40googlegroups.com > <https://groups.google.com/d/msgid/python_inside_maya/931c1e30-1a92-4095-9e99-8b3bbca80cf8n%40googlegroups.com?utm_medium=email&utm_source=footer> > . > -- 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/CAFRtmOB4sxYP0hw6CwkZUq%2Bx25-oLo3DcMX9hHN-T5DTXYp3wA%40mail.gmail.com.
