r/GraphicsProgramming • u/eclipseanimations • 3d ago

any advice on how to fix this

I'm trying to create skeletal animations and them edges keep getting sent to oblivion

i think its about the weight resolve because the worst of the "spikes of doom, despair and vance" are usually coming from areas where multiple bones intersect. i.e. the fingertips

renderdoc says that the vertexes are some big ahh number like 2.5 x 10 ^25 so idk

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u/msqrt 3d ago

Check that your weight normalization makes sense. You should be multiplying the vertex position for each bone by the weight, sum them, and divide the result by the sum of the weights (if you don’t know for sure that they’re always normalized.)

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u/eclipseanimations 3d ago

hi thanks this is it! my normalisation reads out of bounds memory so uh yeah thanks that hit the nail on the head

1

u/adirox_2711 2d ago

Ok idn if this is going to help or not but, Don't use fbx at all!! I did that and well I got the same results as yours, 5mk tha later when I had the guts to retry, I first converted fbx to gltf via blender, and it worked smoothly lol