Behavior was not consistent across modifiers
- Opacity
-- strokes were using inverted weights only when
MOD_GREASE_PENCIL_OPACITY_USE_WEIGHT_AS_FACTOR was OFF, fills however
when MOD_GREASE_PENCIL_OPACITY_USE_WEIGHT_AS_FACTOR was ON
- Tint
-- strokes and fills were using inverted weights only when
MOD_GREASE_PENCIL_TINT_USE_WEIGHT_AS_FACTOR was ON
- others (Envelope, Lattice, Noise, Offset ) were ignoring inverting the
influence vertex group alltogether (but that is reported in #133055 and
will be handled separately, see below)
- others (Hook, ... ) were always inverting it, which is correct
This pull requeset only corrects this for Opacity and Tint (in the way
that now weights are always inverted, no matter if "Use Weight As
Factor" is used).
This also paves the way to a more general fix for #133055 (which intends
to move the weight inversion to the very general
greasepencil::get_influence_vertex_weights)
Pull Request: https://projects.blender.org/blender/blender/pulls/133310
00968fe6db