Added basic filtering feature for velocity smoothing.

This is part of the original method from "Volumetric Methods for
Simulation and Rendering of Hair". The current filter is a simple box
filter. Other energy-preserving filters such as gaussian filtering
can be implemented later.

The filter size is currently given as a cell count. This is not ideal,
rather it should use a geometrical length value, but this is too
abstract for proper artistical use. Eventually defining the whole grid
in terms of spatial size might work better (possibly using an external
object).

1 files changed, 4 insertions, 1 deletions

diff --git a/source/blender/makesdna/DNA_cloth_types.h b/source/blender/makesdna/DNA_cloth_types.h
index c7eee96bd06..39a1abcc76a 100644
--- a/source/blender/makesdna/DNA_cloth_types.h
+++ b/source/blender/makesdna/DNA_cloth_types.h
@@ -75,7 +75,9 @@ typedef struct ClothSimSettings {
 	float	vel_damping; /* damp the velocity to speed up getting to the resting position */
 	float	shrink_min;  /* min amount to shrink cloth by 0.0f (no shrink) - 1.0f (shrink to nothing) */
 	float	shrink_max;  /* max amount to shrink cloth by 0.0f (no shrink) - 1.0f (shrink to nothing) */
-	int		voxel_res;   /* resolution of voxel grid for interaction */
+	
+	int		voxel_res;          /* resolution of voxel grid for interaction */
+	int		voxel_filter_size;  /* filter size for voxel grid */
 
 	int 	stepsPerFrame;	/* Number of time steps per frame.		*/
 	int	flags;		/* flags, see CSIMSETT_FLAGS enum above.	*/
@@ -89,6 +91,7 @@ typedef struct ClothSimSettings {
 	short	shapekey_rest;  /* vertex group for scaling structural stiffness */
 	short	presets; /* used for presets on GUI */
 	short 	reset;
+	int		pad;
 
 	struct EffectorWeights *effector_weights;
 } ClothSimSettings;