Particles todo item: particle textures

* Effecting particle properties with textures was possible in 2.49,
  but not in 2.5 anymore.
* Now particles have their own textures (available in texture panel
  for objects with particle systems), which are totally separate from
  the material textures.
* Currently a basic set of particle properties is available for
  texture control. Some others could still be added, but the whole
  system is not intended as an "change anything with a texture" as
  this kind of functionality will be provided with node particles in
  the future much better.
* Combined with the previously added "particle texture coordinates"
  this new functionality also solves the problem of animating particle
  properties through the particle lifetime nicely.
* Currently the textures only use the intensity of the texture in
  "multiply" blending mode, so in order for the textures to effect
  a particle parameter there has to be a non-zero value defined for
  the parameter in the particle settings. Other blend modes can be
  added later if they're considered useful enough.

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/blenkernel/BKE_texture.h b/source/blender/blenkernel/BKE_texture.h
index cbae90f4c38..d559350a780 100644
--- a/source/blender/blenkernel/BKE_texture.h
+++ b/source/blender/blenkernel/BKE_texture.h
@@ -84,6 +84,7 @@ struct Tex *give_current_material_texture(struct Material *ma);
 struct Tex *give_current_lamp_texture(struct Lamp *la);
 struct Tex *give_current_world_texture(struct World *world);
 struct Tex *give_current_brush_texture(struct Brush *br);
+struct Tex *give_current_particle_texture(struct ParticleSettings *part);
 
 struct bNode *give_current_material_texture_node(struct Material *ma);
 
@@ -94,6 +95,7 @@ void set_current_brush_texture(struct Brush *br, struct Tex *tex);
 void set_current_world_texture(struct World *wo, struct Tex *tex);
 void set_current_material_texture(struct Material *ma, struct Tex *tex);
 void set_current_lamp_texture(struct Lamp *la, struct Tex *tex);
+void set_current_particle_texture(struct ParticleSettings *part, struct Tex *tex);
 
 struct TexMapping *add_mapping(void);
 void init_mapping(struct TexMapping *texmap);