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Geometry Nodes: require vertex groups data in nodes modifier 

Without this, the modifier evaluation code might remove any
vertex groups from the mesh for performance reasons.
We can't say for sure whether the node group will need the vertex
groups, but it is quite likely.

Ref T83357.
This commit is contained in:
Jacques Lucke 2020-12-14 15:28:24 +01:00
parent 6714b800d1
commit 9ee7270e0a
Notes: blender-bot 2023-02-14 11:21:40 +01:00 
Referenced by issue #83357, Design to support instancing (GeometrySet) for mesh objects
1 changed files with 10 additions and 1 deletions
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11
source/blender/modifiers/intern/MOD_nodes.cc
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@ -1063,6 +1063,15 @@ static void freeData(ModifierData *md)
}
}
static void requiredDataMask(Object *UNUSED(ob),
ModifierData *UNUSED(md),
CustomData_MeshMasks *r_cddata_masks)
{
/* We don't know what the node tree will need. If there are vertex groups, it is likely that the
* node tree wants to access them. */
r_cddata_masks->vmask |= CD_MASK_MDEFORMVERT;
}
ModifierTypeInfo modifierType_Nodes = {
/* name */ "GeometryNodes",
/* structName */ "NodesModifierData",
@ -1087,7 +1096,7 @@ ModifierTypeInfo modifierType_Nodes = {
/* modifyVolume */ nullptr,
/* initData */ initData,
/* requiredDataMask */ nullptr,
/* requiredDataMask */ requiredDataMask,
/* freeData */ freeData,
/* isDisabled */ isDisabled,
/* updateDepsgraph */ updateDepsgraph,