Commit: 6733d31f60493535f33a3133065d07e5415b5653
Author: Lukas Tönne
Date: Fri Aug 29 17:07:34 2014 +0200
Branches: testbuild
https://developer.blender.org/rB6733d31f60493535f33a3133065d07e5415b5653
Squash hair_immediate_fixes branch.
===================================================================
M release/scripts/startup/bl_ui/properties_particle.py
M release/scripts/startup/bl_ui/properties_texture.py
M source/blender/blenkernel/BKE_cloth.h
M source/blender/blenkernel/intern/implicit.c
M source/blender/makesdna/DNA_cloth_types.h
M source/blender/makesdna/DNA_texture_types.h
M source/blender/makesrna/intern/rna_cloth.c
M source/blender/makesrna/intern/rna_texture.c
M source/blender/render/intern/source/voxeldata.c
===================================================================
diff --git a/release/scripts/startup/bl_ui/properties_particle.py
b/release/scripts/startup/bl_ui/properties_particle.py
index 30fc3a9..7124271 100644
--- a/release/scripts/startup/bl_ui/properties_particle.py
+++ b/release/scripts/startup/bl_ui/properties_particle.py
@@ -292,6 +292,8 @@ class PARTICLE_PT_hair_dynamics(ParticleButtonsPanel,
Panel):
sub.prop(cloth, "bending_stiffness", text="Bending")
sub.prop(cloth, "internal_friction", slider=True)
sub.prop(cloth, "collider_friction", slider=True)
+ sub.prop(cloth, "pressure", slider=True)
+ sub.prop(cloth, "pressure_threshold", slider=True)
col = split.column()
col.label(text="Damping:")
diff --git a/release/scripts/startup/bl_ui/properties_texture.py
b/release/scripts/startup/bl_ui/properties_texture.py
index faf0d4c..4f5d22d 100644
--- a/release/scripts/startup/bl_ui/properties_texture.py
+++ b/release/scripts/startup/bl_ui/properties_texture.py
@@ -771,6 +771,9 @@ class TEXTURE_PT_voxeldata(TextureButtonsPanel, Panel):
elif vd.file_format == 'SMOKE':
layout.prop(vd, "domain_object")
layout.prop(vd, "smoke_data_type")
+ elif vd.file_format == 'HAIR':
+ layout.prop(vd, "domain_object")
+ layout.prop(vd, "hair_data_type")
elif vd.file_format == 'IMAGE_SEQUENCE':
layout.template_ID(tex, "image", open="image.open")
layout.template_image(tex, "image", tex.image_user, compact=True)
diff --git a/source/blender/blenkernel/BKE_cloth.h
b/source/blender/blenkernel/BKE_cloth.h
index 757d63e..a6e1058 100644
--- a/source/blender/blenkernel/BKE_cloth.h
+++ b/source/blender/blenkernel/BKE_cloth.h
@@ -42,6 +42,7 @@ struct MFace;
struct DerivedMesh;
struct ClothModifierData;
struct CollisionTree;
+struct VoxelData;
#define DO_INLINE MALWAYS_INLINE
@@ -196,6 +197,8 @@ int implicit_free (struct ClothModifierData *clmd );
int implicit_solver (struct Object *ob, float frame, struct ClothModifierData
*clmd, struct ListBase *effectors );
void implicit_set_positions (struct ClothModifierData *clmd );
+bool implicit_hair_volume_get_texture_data(struct Object *UNUSED(ob), struct
ClothModifierData *clmd, struct ListBase *UNUSED(effectors), struct VoxelData
*vd);
+
/////////////////////////////////////////////////
// cloth.c
////////////////////////////////////////////////
diff --git a/source/blender/blenkernel/intern/implicit.c
b/source/blender/blenkernel/intern/implicit.c
index 4d80256..db77190 100644
--- a/source/blender/blenkernel/intern/implicit.c
+++ b/source/blender/blenkernel/intern/implicit.c
@@ -36,6 +36,7 @@
#include "DNA_object_types.h"
#include "DNA_object_force.h"
#include "DNA_meshdata_types.h"
+#include "DNA_texture_types.h"
#include "BLI_math.h"
#include "BLI_linklist.h"
@@ -1404,146 +1405,452 @@ static float calculateVertexWindForce(const float
wind[3], const float vertexnor
return dot_v3v3(wind, vertexnormal);
}
-typedef struct HairGridVert {
- float velocity[3];
- float density;
-} HairGridVert;
-#define HAIR_GRID_INDEX(vec, min, max, axis) (int)((vec[axis] - min[axis]) /
(max[axis] - min[axis]) * 9.99f)
-/* Smoothing of hair velocities:
+/* ================ Volumetric Hair Interaction ================
* adapted from
* Volumetric Methods for Simulation and Rendering of Hair
* by Lena Petrovic, Mark Henne and John Anderson
* Pixar Technical Memo #06-08, Pixar Animation Studios
*/
-static void hair_velocity_smoothing(ClothModifierData *clmd, lfVector *lF,
lfVector *lX, lfVector *lV, unsigned int numverts)
+
+/* Note about array indexing:
+ * Generally the arrays here are one-dimensional.
+ * The relation between 3D indices and the array offset is
+ * offset = x + res_x * y + res_y * z
+ */
+
+/* TODO: This is an initial implementation and should be made much better in
due time.
+ * What should at least be implemented is a grid size parameter and a
smoothing kernel
+ * for bigger grids.
+ */
+
+/* 10x10x10 grid gives nice initial results */
+static const int hair_grid_res = 10;
+
+static int hair_grid_size(int res)
{
- /* TODO: This is an initial implementation and should be made much
better in due time.
- * What should at least be implemented is a grid size parameter and a
smoothing kernel
- * for bigger grids.
- */
+ return res * res * res;
+}
- /* 10x10x10 grid gives nice initial results */
- HairGridVert grid[10][10][10];
- HairGridVert colg[10][10][10];
- ListBase *colliders = get_collider_cache(clmd->scene, NULL, NULL);
- ColliderCache *col = NULL;
- float gmin[3], gmax[3], density;
+BLI_INLINE void hair_grid_get_scale(int res, const float gmin[3], const float
gmax[3], float scale[3])
+{
+ sub_v3_v3v3(scale, gmax, gmin);
+ mul_v3_fl(scale, 1.0f / (res-1));
+}
+
+typedef struct HairGridVert {
+ float velocity[3];
+ float density;
+} HairGridVert;
+
+#define HAIR_GRID_INDEX_AXIS(vec, res, gmin, scale, axis) ( min_ii( max_ii(
(int)((vec[axis] - gmin[axis]) / scale[axis]), 0), res-2 ) )
+
+BLI_INLINE int hair_grid_offset(const float vec[3], int res, const float
gmin[3], const float scale[3])
+{
+ int i, j, k;
+ i = HAIR_GRID_INDEX_AXIS(vec, res, gmin, scale, 0);
+ j = HAIR_GRID_INDEX_AXIS(vec, res, gmin, scale, 1);
+ k = HAIR_GRID_INDEX_AXIS(vec, res, gmin, scale, 2);
+ return i + (j + k*res)*res;
+}
+
+BLI_INLINE int hair_grid_interp_weights(int res, const float gmin[3], const
float scale[3], const float vec[3], float uvw[3])
+{
+ int i, j, k, offset;
+
+ i = HAIR_GRID_INDEX_AXIS(vec, res, gmin, scale, 0);
+ j = HAIR_GRID_INDEX_AXIS(vec, res, gmin, scale, 1);
+ k = HAIR_GRID_INDEX_AXIS(vec, res, gmin, scale, 2);
+ offset = i + (j + k*res)*res;
+
+ uvw[0] = (vec[0] - gmin[0]) / scale[0] - (float)i;
+ uvw[1] = (vec[1] - gmin[1]) / scale[1] - (float)j;
+ uvw[2] = (vec[2] - gmin[2]) / scale[2] - (float)k;
+
+ return offset;
+}
+
+BLI_INLINE void hair_grid_interpolate(const HairGridVert *grid, int res, const
float gmin[3], const float scale[3], const float vec[3],
+ float *density, float velocity[3], float
density_gradient[3])
+{
+ HairGridVert data[8];
+ float uvw[3], muvw[3];
+ int res2 = res * res;
+ int offset;
+
+ offset = hair_grid_interp_weights(res, gmin, scale, vec, uvw);
+ muvw[0] = 1.0f - uvw[0];
+ muvw[1] = 1.0f - uvw[1];
+ muvw[2] = 1.0f - uvw[2];
+
+ data[0] = grid[offset ];
+ data[1] = grid[offset +1];
+ data[2] = grid[offset +res ];
+ data[3] = grid[offset +res+1];
+ data[4] = grid[offset+res2 ];
+ data[5] = grid[offset+res2 +1];
+ data[6] = grid[offset+res2+res ];
+ data[7] = grid[offset+res2+res+1];
+
+ if (density) {
+ *density = muvw[2]*( muvw[1]*( muvw[0]*data[0].density +
uvw[0]*data[1].density ) +
+ uvw[1]*( muvw[0]*data[2].density +
uvw[0]*data[3].density ) ) +
+ uvw[2]*( muvw[1]*( muvw[0]*data[4].density +
uvw[0]*data[5].density ) +
+ uvw[1]*( muvw[0]*data[6].density +
uvw[0]*data[7].density ) );
+ }
+ if (velocity) {
+ int k;
+ for (k = 0; k < 3; ++k) {
+ velocity[k] = muvw[2]*( muvw[1]*(
muvw[0]*data[0].velocity[k] + uvw[0]*data[1].velocity[k] ) +
+ uvw[1]*(
muvw[0]*data[2].velocity[k] + uvw[0]*data[3].velocity[k] ) ) +
+ uvw[2]*( muvw[1]*(
muvw[0]*data[4].velocity[k] + uvw[0]*data[5].velocity[k] ) +
+ uvw[1]*(
muvw[0]*data[6].velocity[k] + uvw[0]*data[7].velocity[k] ) );
+ }
+ }
+ if (density_gradient) {
+ density_gradient[0] = muvw[1] * muvw[2] * ( data[0].density -
data[1].density ) +
+ uvw[1] * muvw[2] * ( data[2].density -
data[3].density ) +
+ muvw[1] * uvw[2] * ( data[4].density -
data[5].density ) +
+ uvw[1] * uvw[2] * ( data[6].density -
data[7].density );
+
+ density_gradient[1] = muvw[2] * muvw[0] * ( data[0].density -
data[2].density ) +
+ uvw[2] * muvw[0] * ( data[4].density -
data[6].density ) +
+ muvw[2] * uvw[0] * ( data[1].density -
data[3].density ) +
+ uvw[2] * uvw[0] * ( data[5].density -
data[7].density );
+
+ density_gradient[2] = muvw[2] * muvw[0] * ( data[0].density -
data[4].density ) +
+ uvw[2] * muvw[0] * ( data[1].density -
data[5].density ) +
+ muvw[2] * uvw[0] * ( data[2].density -
data[6].density ) +
+ uvw[2] * uvw[0] * ( data[3].density -
data[7].density );
+ }
+}
+
+static void hair_velocity_smoothing(const HairGridVert *hairgrid, const float
gmin[3], const float scale[3], float smoothfac,
+ lfVector *lF, lfVector *lX, lfVector *lV,
unsigned int numverts)
+{
+ int v;
+ /* calculate forces */
+ for (v = 0; v < numverts; v++) {
+ float density, velocity[3];
+
+ hair_grid_interpolate(hairgrid, hair_grid_res, gmin, scale,
lX[v], &density, velocity, NULL);
+
+ sub_v3_v3(velocity, lV[v]);
+ madd_v3_v3fl(lF[v], velocity, smoothfac);
+ }
+}
+
+static void hair_velocity_collision(const HairGridVert *collgrid, const float
gmin[3], const float scale[3], float collfac,
+ lfVector *lF, lfVector *lX, lfVector *lV,
unsigned int numverts)
+{
+ int v;
+ /* calculate forces */
+ for (v = 0; v < numverts; v++) {
+ int offset = hair_grid_offset(lX[v], hair_grid_res, gmin,
scale);
+
+ if (collgrid[offset].density > 0.0f) {
+ lF[v][0] += collfac * (collgrid[offset].velocity[0] -
lV[v][0]);
+ lF[v][1] += collfac * (collgrid[offset].velocity[1] -
lV[v][1]);
+ lF[v][2] += collfac * (collgrid[offset].velocity[2] -
lV[v][2]);
+ }
+ }
+}
+
+static void hair_pressure_force(const HairGridVert *hairgrid, const float
gmin[3], const float scale[3], float pressurefac, float minpressure,
+ lfVector *lF, lfVector *lX, unsigned int
numverts)
+{
+ int v;
+
+ /* calculate forces */
+ for (v = 0; v < numverts; v++) {
+ float density, gradient[3], gradlen;
+
+ hair_grid_interpolate(hairgrid, hair_grid_res, gmin, scale,
lX[v], &density, NULL, gradient);
+
+ gradlen = normalize_v3(gradient) - minpressure;
@@ Diff output truncated at 10240 characters. @@
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