On Tue, May 9, 2017 at 1:41 PM Aren Voorhees <are...@gmail.com> wrote:
> Hey Justin - it is applying the gradient correctly. It seems like the > vert id list and the point list, do correspond to each other although I'm > not sure why (don't have Maya in front of me atm so I can't take a closer > look). > If it works as you expect, then can't really argue with that :) > Apparently when considering vert ids and points, Maya does it in the same > order? > Well even if that is true, it wouldn't make sense based on your code. You sort the vert list but not the point list. And somehow that works out. > > On Wednesday, May 3, 2017 at 3:08:02 PM UTC-5, Justin Israel wrote: > >> >> >> On Thu, May 4, 2017, 2:06 AM Aren Voorhees <are...@gmail.com> wrote: >> >>> Thanks to you both for the tips - this is what I came up with: >>> >>> https://pastebin.com/sRNqxARX >>> >>> Now it takes .3 seconds on a 75k vert mesh - pretty good speed increase >>> I'd say! >>> >> >> Nice job. >> Does it apply the gradient the way you wanted, considering it is still >> using a sorted vert list and a color list that is in the order of the >> unsorted points? >> >> >>> >>> On Tuesday, May 2, 2017 at 2:50:15 PM UTC-5, Andres Weber wrote: >>>> >>>> Also I haven't done ANY timing to see if this actually helps, but >>>> you're casting a sublist to a set and back to a list...you could get a >>>> super minor speed up by just doing xrange(selMesh.numVertices()) to get the >>>> full vertex list. You're also wasting time with the enumerate and index >>>> lookup on the second same size list. You could just zip the two generators >>>> and normalize on demand by using a generator comprehension for >>>> pointsDirList and that might speed things up a little. I'm sure these are >>>> extremely minimal if at all but just some ideas. Justin's is going to be a >>>> huge speed increase I'm sure. >>>> >>>> >>>> On Monday, May 1, 2017 at 5:52:46 PM UTC-4, Justin Israel wrote: >>>>> >>>>> >>>>> >>>>> On Tue, May 2, 2017 at 9:31 AM Aren Voorhees <are...@gmail.com> wrote: >>>>> >>>>>> Ah, got it. I didn't think about the fact that I was rearranging the >>>>>> order of the point list, making it not correspond to the vertex list. To >>>>>> get it working, my only change was to take out the sorted() on line 14. >>>>>> >>>>>> Getting it working brought another issue to light though...it works >>>>>> really slowly. In a test just now, it took nearly a minute to run on a >>>>>> 4k >>>>>> vert mesh, which is on the much lower end of mesh size I'd expect this to >>>>>> be used on. The slowdown seems to be happening completely in the last >>>>>> for >>>>>> loop starting on line 24. Any ideas on how I could optimize this? >>>>>> >>>>> >>>>> If you look at the API docs for setVertexColor >>>>> <http://help.autodesk.com/cloudhelp/2016/ENU/Maya-SDK/cpp_ref/class_m_fn_mesh.html#a7b2000791e09a5ab2759ee23044257a9>, >>>>> it has this note: >>>>> >>>>> NOTE: To change the colors of many vertices, it is more efficient to >>>>> use the batch updating method setVertexColors() >>>>> <http://help.autodesk.com/cloudhelp/2016/ENU/Maya-SDK/cpp_ref/class_m_fn_mesh.html#ac87fe328d734133476d0ae30796c7400> >>>>> instead. >>>>> >>>>> So you could build the color and vertex arrays up front, and then make >>>>> one call to set the colors. >>>>> >>>>> >>>>>> >>>>>> >>>>>> On Monday, May 1, 2017 at 3:24:47 PM UTC-5, Andres Weber wrote: >>>>>>> >>>>>>> The problme is that you sorted the points list (and got it out of >>>>>>> order from the original vertex list) and then used that to as the basis >>>>>>> for >>>>>>> building your normalized list of values. So, ignoring optimization or >>>>>>> anything, just put the comprehension on the for loop at line 19: for >>>>>>> val in >>>>>>> [p[1] for p in pointsList] >>>>>>> instead of reusing the pointsDirList that you used to determine the >>>>>>> min/max. That should get it back to working. >>>>>>> >>>>>>> On Monday, May 1, 2017 at 3:10:00 PM UTC-4, Aren Voorhees wrote: >>>>>>>> >>>>>>>> I have an old script that assigns vertex colors to a mesh, based on >>>>>>>> the vert's position (can be used to create worldspace gradients - >>>>>>>> useful >>>>>>>> for world position offset vertex animation in real-time applications). >>>>>>>> Anyway, I'm working on re-writing this tool using the python API to >>>>>>>> hopefully make it quicker on dense meshes. This is my first time >>>>>>>> really >>>>>>>> trying to use the api, so I'm kind of stumbling my way through it. >>>>>>>> I've >>>>>>>> found a way to get the point positions and a list of vertex IDs on a >>>>>>>> given >>>>>>>> mesh. However, those two lists don't correspond to each other so when >>>>>>>> I >>>>>>>> run the below code, it doesn't assign the right vert colors to the >>>>>>>> correct >>>>>>>> mesh. Is there some way I can make the two lists, or two sets of >>>>>>>> information match together to fix this issue? (Note: Currently I'm just >>>>>>>> trying to create a Y gradient which is why I am just getting 2nd value >>>>>>>> for >>>>>>>> each point). >>>>>>>> >>>>>>>> https://pastebin.com/s3fGRPNG >>>>>>>> >>>>>>>> -- >>>>>> 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/16ecb20f-46e5-4ab2-b467-72c34f784e9d%40googlegroups.com >>>>>> <https://groups.google.com/d/msgid/python_inside_maya/16ecb20f-46e5-4ab2-b467-72c34f784e9d%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/560048e2-02cb-4b90-a1ed-9ceca09b4a50%40googlegroups.com >>> <https://groups.google.com/d/msgid/python_inside_maya/560048e2-02cb-4b90-a1ed-9ceca09b4a50%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/c1ccde65-a80e-4a77-a109-4c98db8ea650%40googlegroups.com > <https://groups.google.com/d/msgid/python_inside_maya/c1ccde65-a80e-4a77-a109-4c98db8ea650%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. 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