Particle Info node for Cycles. This can be used to access particle information in material shaders for dupli objects. For now only the particle Age and individual Lifetime (in frames) are supported, more attributes can be added when needed.

The particle data is stored in a separate texture if any of the dupli objects uses particle info nodes in shaders. To map dupli objects onto particles the store an additional particle_index value, which is different from the simple dupli object index (only visible particles, also works for particle dupli groups mode).

Some simple use cases on the code.blender.org blog:
http://code.blender.org/index.php/2012/05/particle-info-node/

1 files changed, 10 insertions, 0 deletions

diff --git a/source/blender/makesrna/intern/rna_object.c b/source/blender/makesrna/intern/rna_object.c
index 7e3b368aa64..0399a8ee60d 100644
--- a/source/blender/makesrna/intern/rna_object.c
+++ b/source/blender/makesrna/intern/rna_object.c
@@ -2545,6 +2545,16 @@ static void rna_def_dupli_object(BlenderRNA *brna)
 	RNA_def_property_clear_flag(prop, PROP_ANIMATABLE | PROP_EDITABLE);
 	RNA_def_property_ui_text(prop, "Hide", "Don't show dupli object in viewport or render");
 
+	prop = RNA_def_property(srna, "index", PROP_INT, PROP_NONE);
+	RNA_def_property_int_sdna(prop, NULL, "index");
+	RNA_def_property_clear_flag(prop, PROP_ANIMATABLE | PROP_EDITABLE);
+	RNA_def_property_ui_text(prop, "Index", "Index in the lowest-level dupli list");
+	
+	prop = RNA_def_property(srna, "particle_index", PROP_INT, PROP_NONE);
+	RNA_def_property_int_sdna(prop, NULL, "particle_index");
+	RNA_def_property_clear_flag(prop, PROP_ANIMATABLE | PROP_EDITABLE);
+	RNA_def_property_ui_text(prop, "Particle Index", "Index in the lowest-level particle dupli list");
+
 	/* TODO: DupliObject has more properties that can be wrapped */
 }