B-Mesh: Issue with Weight Painting #30266

New Issue

Thomas Dinges · 2012-02-19T22:08:50+01:00

Thomas Dinges commented

2012-02-19 22:08:50 +01:00

Relates to: #30234

%%%Windows 7 x64, SVN 44262, nvidia GT540

Open Blender, go into Weight Paint Mode
The colors are black and grey and you can't draw weights.
The Issue is fixed by going into Vertex Paint Mode and then back to Weight Paint mode, then all is normal%%%

**Relates to**: #30234 %%%Windows 7 x64, SVN 44262, nvidia GT540 1) Open Blender, go into Weight Paint Mode The colors are black and grey and you can't draw weights. 2) The Issue is fixed by going into Vertex Paint Mode and then back to Weight Paint mode, then all is normal%%%

Thomas Dinges commented

2012-02-19 22:08:50 +01:00

Changed status to: 'Open'

Nicholas Bishop commented

2012-02-20 00:36:11 +01:00

%%%This is a display bug: creating the DerivedMesh updates CD_WEIGHT_MLOOPCOL values in DM_update_weight_mcol(), but CDDM draws using tesselated faces. If the finaldm produced in mesh_calc_modifiers() does not have tessfaces, then recalcTesselation() is called and the tesselated colors (CD_WEIGHT_MCOL) are copied over from the loop colors. If the finaldm is already tesselated, CD_WEIGHT_MCOL is never updated.

Couple ways to solve this: can either add in an extra loop to copy over the weight colors in this case, or could clear the mesh's tessfaces when entering weight paint mode. Could use guidance as to which the correct approach :)%%%

%%%This is a display bug: creating the DerivedMesh updates CD_WEIGHT_MLOOPCOL values in DM_update_weight_mcol(), but CDDM draws using tesselated faces. If the finaldm produced in mesh_calc_modifiers() does not have tessfaces, then recalcTesselation() is called and the tesselated colors (CD_WEIGHT_MCOL) are copied over from the loop colors. If the finaldm is already tesselated, CD_WEIGHT_MCOL is never updated. Couple ways to solve this: can either add in an extra loop to copy over the weight colors in this case, or could clear the mesh's tessfaces when entering weight paint mode. Could use guidance as to which the correct approach :)%%%

Campbell Barton commented

2012-02-20 02:25:27 +01:00

%%%worked around for now by not having tessfaces on the mesh by default though if tessfaces are added this can still happen.

for eg - run C.object.data.update() and you can see the bug again.

the modifier stack calculation could check for this case explicitly - "if the mesh has weights and started with tessfaces always retesselate", but this isnt at all elegant.%%%

%%%worked around for now by not having tessfaces on the mesh by default though if tessfaces are added this can still happen. for eg - run C.object.data.update() and you can see the bug again. the modifier stack calculation could check for this case explicitly - "if the mesh has weights and started with tessfaces always retesselate", but this isnt at all elegant.%%%

Bastien Montagne commented

2012-02-20 19:51:33 +01:00

%%%This case is one of those tackled by patch in [#30234].

%%%

%%%This case is one of those tackled by patch in [#30234]. %%%

Bastien Montagne commented

2012-03-18 23:15:00 +01:00

%%%Should be definitively fixed in svn44978, closing.

Thanks for reporting! :)%%%

%%%Should be definitively fixed in svn44978, closing. Thanks for reporting! :)%%%

Bastien Montagne commented

2012-03-18 23:15:00 +01:00

Changed status from 'Open' to: 'Resolved'

Bastien Montagne closed this issue

2012-03-18 23:15:00 +01:00

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B-Mesh: Issue with Weight Painting #30266