Sculpt: Enable persistent base for the cloth brush

The cloth brush builds the constraints when the stroke starts usign the
current state of the mesh. This means that deformations profuced by the
simulattion will accumulate after multiple strokes as it will always
start from the previous deformed state. While this is useful in many
cases, for other uses it is convenient to always simulate the same
initial shape, but applying different forces to it.

The persistent base options work like the persistent base in the layer
brush and allows the cloth brush to not accumulate deformation after
each stroke. When enabled, constraints are created for the shape stored
in the persistent base instead of from the current state of the mesh.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D8428

1 files changed, 3 insertions, 0 deletions

diff --git a/source/blender/editors/sculpt_paint/sculpt_intern.h b/source/blender/editors/sculpt_paint/sculpt_intern.h
index f834ab7b179..47e6fb55d81 100644
--- a/source/blender/editors/sculpt_paint/sculpt_intern.h
+++ b/source/blender/editors/sculpt_paint/sculpt_intern.h
@@ -98,6 +98,9 @@ void SCULPT_vertex_normal_get(SculptSession *ss, int index, float no[3]);
 float SCULPT_vertex_mask_get(struct SculptSession *ss, int index);
 const float *SCULPT_vertex_color_get(SculptSession *ss, int index);
 
+const float *SCULPT_vertex_persistent_co_get(SculptSession *ss, int index);
+void SCULPT_vertex_persistent_normal_get(SculptSession *ss, int index, float no[3]);
+
 #define SCULPT_VERTEX_NEIGHBOR_FIXED_CAPACITY 256
 typedef struct SculptVertexNeighborIter {
   /* Storage */