Sculpt: Sharpen Mesh Filter curvature smoothing and intensify details

This adds a curvature smoothing and intensify details properties to control
the result of the Sharpen Mesh Filter.

Curvature smoothing removes high frequency details from the precalculated
sharpen data, so the filter result has much smoother surfaces and cleaner
sharpen lines;

Intensify details displaces the vertices of creases and valleys in the direction
opposite to its neighbors average, so it intensifies high frequency details
in those areas, producing more noisy and sharp shapes:

Both this properties can be used in combination to achieve a good balance of
high and low frequency details depending on the shape and the desired result.

Reviewed By: sergey

Differential Revision: https://developer.blender.org/D8447

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 47e6fb55d81..f5cfd423d8f 100644
--- a/source/blender/editors/sculpt_paint/sculpt_intern.h
+++ b/source/blender/editors/sculpt_paint/sculpt_intern.h
@@ -909,7 +909,10 @@ typedef struct FilterCache {
 
   /* Sharpen mesh filter. */
   float sharpen_smooth_ratio;
+  float sharpen_intensify_detail_strength;
+  int sharpen_curvature_smooth_iterations;
   float *sharpen_factor;
+  float (*sharpen_detail_directions)[3];
 
   /* unmasked nodes */
   PBVHNode **nodes;