Bake Vertex Parenting is an Blender Addon to Automate attach objects to the mesh, it generates weight paint and shape keys automatically
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Position the object you want to parent
Make sure that the object is a separate mesh and that its origin is at the point you want to attach (the addon uses the origin for this)
open the BVP side panel and click in Auto Vertex Parent
Test the shape keys to see if they are attach correctly
If not, do the vertex parent manually until you get a good result
Open the BVP side panel and click in Bake Vertex Parenting
Done
Fixed a bug that occurred when all selected objects had a duplicate Shape keys
Add a Check Box to ignore duplicate Shape keys
Removing an unnecessary print
Bug fixes
Progress bar (experimental)
Option to parent to the closest face or to the 3 closest vertices
Checkbox to generate weight paints and drivers during the bake process