Sculpt Mode: 2D falloff option

This makes brush influence into a tube instead of a sphere.
It can be used along the outline of a mesh to adjust it's silhouette.

Note that all this takes advantage of changes from vertex paint,
from testing this seems useful so exposing from the brush options.

1 files changed, 8 insertions, 1 deletions

diff --git a/source/blender/editors/sculpt_paint/sculpt_intern.h b/source/blender/editors/sculpt_paint/sculpt_intern.h
index b9b662f4157..73581d402cf 100644
--- a/source/blender/editors/sculpt_paint/sculpt_intern.h
+++ b/source/blender/editors/sculpt_paint/sculpt_intern.h
@@ -182,7 +182,10 @@ typedef struct SculptBrushTest {
 	int mirror_symmetry_pass;
 
 	/* For circle (not sphere) projection. */
-	float plane[4];
+	float plane_view[4];
+
+	/* Some tool code uses a plane for it's calculateions. */
+	float plane_tool[4];
 
 	/* View3d clipping - only set rv3d for clipping */
 	struct RegionView3D *clip_rv3d;
@@ -213,6 +216,10 @@ bool sculpt_brush_test_cube(SculptBrushTest *test, const float co[3], float loca
 bool sculpt_brush_test_circle_sq(SculptBrushTest *test, const float co[3]);
 bool sculpt_search_sphere_cb(PBVHNode *node, void *data_v);
 bool sculpt_search_circle_cb(PBVHNode *node, void *data_v);
+
+SculptBrushTestFn sculpt_brush_test_init_with_falloff_shape(
+        SculptSession *ss, SculptBrushTest *test, char falloff_shape);
+
 float tex_strength(
         struct SculptSession *ss, const struct Brush *br,
         const float point[3],