Optional clumping noise feature for simulating twisted hair strands.

This adds another level of clumping on child hairs. When enabled, child
hairs chose a secondary clumping target using a Voronoi pattern. This
adds visual detail on a smaller scale, which is useful particularly when
the number of parents is relatively small.

Natural fibres behave in a similar way when they become sticky and
intertwined. Hairs close to each other form a first twisted strand, then
combine into larger strands. Similar features can be found in ropes:
http://en.wikipedia.org/wiki/Hair_twists
http://en.wikipedia.org/wiki/Rope

Conflicts:
	source/blender/blenloader/intern/versioning_270.c

1 files changed, 1 insertions, 1 deletions

diff --git a/source/blender/blenkernel/BKE_particle.h b/source/blender/blenkernel/BKE_particle.h
index b0b605e40ca..35e89eeef9e 100644
--- a/source/blender/blenkernel/BKE_particle.h
+++ b/source/blender/blenkernel/BKE_particle.h
@@ -343,7 +343,7 @@ void BKE_particlesettings_clump_curve_init(struct ParticleSettings *part);
 void BKE_particlesettings_rough_curve_init(struct ParticleSettings *part);
 void psys_apply_child_modifiers(struct ParticleThreadContext *ctx, struct ListBase *modifiers,
                                 struct ChildParticle *cpa, struct ParticleTexture *ptex, const float orco[3], const float ornor[3], float hairmat[4][4],
-                                struct ParticleCacheKey *keys, struct ParticleCacheKey *parent_keys);
+                                struct ParticleCacheKey *keys, struct ParticleCacheKey *parent_keys, const float parent_orco[3]);
 
 void psys_sph_init(struct ParticleSimulationData *sim, struct SPHData *sphdata);
 void psys_sph_finalise(struct SPHData *sphdata);