There is a list of attributes, along with operators to add and remove
attributes. For adding, there are a few standard attributes that can be
added quickly, as well as a popup to create a custom attribute.
Ref T76659
Differential Revision: https://developer.blender.org/D8636
Instead of custom data layer with special types, using general Vector and Float
attributes.
Ref T76659
Differential Revision: https://developer.blender.org/D8635
This puts all generic float/int/vector/color/string geometry attributes in a new
.attributes property. For meshes it provides a more general API for existing
attributes, for point clouds attributes will be used as an essential part of
particle nodes.
This patch was implemented by @lichtwerk, with further changes by me. It's
still a work in progress, but posting here to show what is going on and for
early feedback.
Ref T76659
Differential Revision: https://developer.blender.org/D8200
