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, 14 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_texture.c b/source/blender/makesrna/intern/rna_texture.c
index 7c83676113d..9f6014fdbc2 100644
--- a/source/blender/makesrna/intern/rna_texture.c
+++ b/source/blender/makesrna/intern/rna_texture.c
@@ -185,6 +185,20 @@ void rna_TextureSlot_update(Main *bmain, Scene *scene, PointerRNA *ptr)
 		case ID_BR: 
 			WM_main_add_notifier(NC_BRUSH, id);
 			break;
+		case ID_PA:
+		{
+			MTex *mtex= ptr->data;
+			int recalc = OB_RECALC_DATA;
+
+			if(mtex->mapto & PAMAP_INIT)
+				recalc |= PSYS_RECALC_RESET;
+			if(mtex->mapto & PAMAP_CHILD)
+				recalc |= PSYS_RECALC_CHILD;
+
+			DAG_id_tag_update(id, recalc);
+			WM_main_add_notifier(NC_OBJECT|ND_PARTICLE|NA_EDITED, NULL);
+			break;
+		}
 	}
 }