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, 4 insertions, 0 deletions

diff --git a/source/blender/editors/sculpt_paint/paint_ops.c b/source/blender/editors/sculpt_paint/paint_ops.c
index 40dcb92f087..10b9f26dbcd 100644
--- a/source/blender/editors/sculpt_paint/paint_ops.c
+++ b/source/blender/editors/sculpt_paint/paint_ops.c
@@ -475,6 +475,7 @@ void ED_operatortypes_paint(void)
 	WM_operatortype_append(PAINT_OT_weight_paint);
 	WM_operatortype_append(PAINT_OT_weight_set);
 	WM_operatortype_append(PAINT_OT_weight_from_bones);
+	WM_operatortype_append(PAINT_OT_weight_gradient);
 	WM_operatortype_append(PAINT_OT_weight_sample);
 	WM_operatortype_append(PAINT_OT_weight_sample_group);
 
@@ -710,6 +711,9 @@ void ED_keymap_paint(wmKeyConfig *keyconf)
 	WM_keymap_verify_item(keymap, "PAINT_OT_weight_sample", LEFTMOUSE, KM_PRESS, KM_CTRL, 0);
 	WM_keymap_verify_item(keymap, "PAINT_OT_weight_sample_group", LEFTMOUSE, KM_PRESS, KM_SHIFT, 0);
 
+	RNA_enum_set(WM_keymap_add_item(keymap, "PAINT_OT_weight_gradient", LEFTMOUSE, KM_PRESS, KM_ALT, 0)->ptr,           "type", WPAINT_GRADIENT_TYPE_LINEAR);
+	RNA_enum_set(WM_keymap_add_item(keymap, "PAINT_OT_weight_gradient", LEFTMOUSE, KM_PRESS, KM_ALT | KM_CTRL, 0)->ptr, "type", WPAINT_GRADIENT_TYPE_RADIAL);
+
 	WM_keymap_add_item(keymap,
 	                   "PAINT_OT_weight_set", KKEY, KM_PRESS, KM_SHIFT, 0);