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1. Re: Maya Python Script Performance Issues

   

   Reply by Deadly Nightshade · Oct 2022 · Home› Coding, Scripting, Shaders

   Huge per-vertex operations are typically slow when going with just maya.cmds and pymel due to the nature of the programming language (Python). What I would suggest is to use the Maya API instead. Easiest stepping-stone into that would be the Python bindings (OpenMaya). Create a vertex iterator (MItMeshVertex class) and…

2. Re: Maya Python Script Performance Issues

   

   Reply by poopipe · Jun 2022 · Home› Coding, Scripting, Shaders

   Using openmaya will make it orders of magnitude faster which is usually enough. As I said above the problem is in the way Maya's standard python API deals with lists of Maya objects - which is slow. Openmaya sidesteps that

3. Maya Python Script Performance Issues

   

   Topic by thefelixone · Apr 2022 · Home› Coding, Scripting, Shaders

   Hello! I just finished doing a small script that is really helpful to encode proximity data from scalp to cards. The issue I have right now is that the script is really... REALLY heavy, like it takes a long time to process 50k tries. Anyone has tips on how to improve the result? Thanks alot! import maya.cmds as cmds import…

4. Re: Maya Python Script Performance Issues

   

   Reply by poopipe · Oct 2022 · Home› Coding, Scripting, Shaders

   In theory 5-10k times faster.. You're absolutely not wrong though, the fastest way to do this would be to do it differently

5. Re: Maya Python Script Performance Issues

   

   Reply by foxagon · Oct 2022 · Home› Coding, Scripting, Shaders

   quick OpenMaya example of using a mesh intersector to get closest point on surface import maya.OpenMaya as OpenMaya def getDagPath(obj): selectionList = OpenMaya.MSelectionList() try: selectionList.add(obj) except RuntimeError: return None dagPath = OpenMaya.MDagPath() try: selectionList.getDagPath(0, dagPath) except…

6. Re: Maya Python Script Performance Issues

   

   Reply by Finnn · Jul 2022 · Home› Coding, Scripting, Shaders

   Would be very interesting to see what difference it actually makes. :)

7. Re: Maya Python Script Performance Issues

   

   Reply by Finnn · Jun 2022 · Home› Coding, Scripting, Shaders

   You are having a loop inside a loop. If both list of vertices have 50k entries, that means you have to iterate 2,500,000,000 times. And everytime you do a (nested) squareroot operation with list accesses etc. There is no way that you can use another library and it will be fast all of the sudden. You have to rethink your…

8. Re: Maya Python Script Performance Issues

   

   Reply by neilberard · May 2022 · Home› Coding, Scripting, Shaders

   I would use Open Maya 2.0 and iterate on MfnMesh points. Should be a lot faster. https://help.autodesk.com/view/MAYAUL/2022/ENU/?guid=Maya_SDK_py_ref_index_html

9. Re: Maya Python Script Performance Issues

   

   Reply by poopipe · Apr 2022 · Home› Coding, Scripting, Shaders

   I don't do much Maya scripting anymore because I hate it. But. Maya is really slow when dealing with lists of vertices and other similar objects. Using openmaya will help. Alternatively using the string name representation of the vertices rather than the object itself can help in certain circumstances. Anything to avoid…