From c3e1fce77552b5626d2939710cb6d0020891d218 Mon Sep 17 00:00:00 2001 From: Brecht Van Lommel Date: Mon, 21 May 2012 12:52:28 +0000 Subject: Cycles: add Object Info node, with outputs object location, object/material pass index, and a random number unique to the instance of the object. This can be useful to give some variation to a single material assigned to multiple instances, either manually controlled through the object index, based on the object location, or randomized for each instance. http://wiki.blender.org/index.php/Doc:2.6/Manual/Render/Cycles/Nodes/More#Object_Info --- intern/cycles/render/object.cpp | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) (limited to 'intern/cycles/render/object.cpp') diff --git a/intern/cycles/render/object.cpp b/intern/cycles/render/object.cpp index cae69c06f7d..e38b2635f90 100644 --- a/intern/cycles/render/object.cpp +++ b/intern/cycles/render/object.cpp @@ -23,6 +23,7 @@ #include "scene.h" #include "util_foreach.h" +#include "util_hash.h" #include "util_map.h" #include "util_progress.h" @@ -36,6 +37,7 @@ Object::Object() mesh = NULL; tfm = transform_identity(); visibility = ~0; + instance_id = 0; pass_id = 0; bounds = BoundBox::empty; motion.pre = transform_identity(); @@ -164,6 +166,9 @@ void ObjectManager::device_update_transforms(Device *device, DeviceScene *dscene float surface_area = 0.0f; float pass_id = ob->pass_id; + uint ob_hash = hash_int_2d(hash_string(ob->name.c_str()), ob->instance_id); + float random_number = (float)ob_hash * (1.0f/(float)0xFFFFFFFF); + if(transform_uniform_scale(tfm, uniform_scale)) { map::iterator it = surface_area_map.find(mesh); @@ -198,7 +203,7 @@ void ObjectManager::device_update_transforms(Device *device, DeviceScene *dscene memcpy(&objects[offset], &tfm, sizeof(float4)*3); memcpy(&objects[offset+3], &itfm, sizeof(float4)*3); - objects[offset+6] = make_float4(surface_area, pass_id, 0.0f, 0.0f); + objects[offset+6] = make_float4(surface_area, pass_id, random_number, 0.0f); if(need_motion == Scene::MOTION_PASS) { /* motion transformations, is world/object space depending if mesh -- cgit v1.2.3