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Better grid rasterization method for hair volumetric grids.

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This is based on the paper
"Detail Preserving Continuum Simulation of Straight Hair"
(McAdams, Selle, Ward, 2009)

The main difference is that hair line segments are used rather than only
rasterizing velocity at the vertices. This gives a much better coverage
of the hair volume grid, otherwise gaps can be produced at smaller grid
cell sizes and the distribution is uneven along the hair curve.

The algorithm for rasterizing is a variation of Bresenham's algorithm
extended onto 3D grids.

Conflicts:
	source/blender/physics/intern/BPH_mass_spring.cpp
This commit is contained in:
Lukas Tönne
2014-11-06 12:17:09 +01:00
parent c37de38716
commit d05c653ade
4 changed files with 376 additions and 11 deletions
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4
source/blender/blenkernel/intern/collision.c
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@@ -1061,6 +1061,7 @@ static bool cloth_points_collision_response_static(ClothModifierData *clmd, Coll
bounce = 0.0f;
mul_v3_v3fl(impulse, collpair->normal, repulse);
}
#if 0
{
float d[3], md[3];
mul_v3_v3fl(d, collpair->normal, -collpair->distance);
@@ -1072,8 +1073,9 @@ static bool cloth_points_collision_response_static(ClothModifierData *clmd, Coll
BKE_sim_debug_data_add_line(clmd->debug_data, collmd->current_x[collpair->bp2].co, collmd->current_x[collpair->bp3].co, 0, 0, 1, "collision", hash_collpair(86, collpair));
BKE_sim_debug_data_add_line(clmd->debug_data, collmd->current_x[collpair->bp3].co, collmd->current_x[collpair->bp1].co, 0, 0, 1, "collision", hash_collpair(87, collpair));
}
#endif
cloth1->verts[collpair->ap1].impulse_count++;
BKE_sim_debug_data_add_vector(clmd->debug_data, collpair->pa, impulse, 1.0, 1.0, 1.0, "collision", hash_collpair(873, collpair));
// BKE_sim_debug_data_add_vector(clmd->debug_data, collpair->pa, impulse, 1.0, 1.0, 1.0, "collision", hash_collpair(873, collpair));
result = true;
}