Weight gradient tool for weight paint mode

- blends from current weight into alpha zero.
- uses brush alpha & curve.
- respects weight paint vertex/face select modes.
- updates realtime.


Access With
- Alt+LMB (linear gradient)
- Ctrl+Alt+LMB (radial gradient)


note:
- WM_gesture_straightline_* are used but not well suited to this task, may end up replacing with own modal operator.
- Key handling works but needs to be done better.

1 files changed, 6 insertions, 0 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_intern.h b/source/blender/editors/sculpt_paint/paint_intern.h
index 162e2fa15d6..cf55c93efe4 100644
--- a/source/blender/editors/sculpt_paint/paint_intern.h
+++ b/source/blender/editors/sculpt_paint/paint_intern.h
@@ -89,6 +89,12 @@ void PAINT_OT_weight_from_bones(struct wmOperatorType *ot);
 void PAINT_OT_weight_sample(struct wmOperatorType *ot);
 void PAINT_OT_weight_sample_group(struct wmOperatorType *ot);
 
+enum {
+	WPAINT_GRADIENT_TYPE_LINEAR,
+	WPAINT_GRADIENT_TYPE_RADIAL
+};
+void PAINT_OT_weight_gradient(struct wmOperatorType *ot);
+
 void PAINT_OT_vertex_paint_toggle(struct wmOperatorType *ot);
 void PAINT_OT_vertex_paint(struct wmOperatorType *ot);