[Bf-blender-cvs] SVN commit: /data/svn/bf-blender [59532] branches/soc-2013-cycles_mblur/ intern/cycles/bvh/bvh_build.cpp: Added BVH code to the add_reference_mesh() function.

[Gavin Howard]

Revision: 59532
          http://projects.blender.org/scm/viewvc.php?view=rev&root=bf-blender&revision=59532
Author:   gdh
Date:     2013-08-26 17:50:16 +0000 (Mon, 26 Aug 2013)
Log Message:
-----------
Added BVH code to the add_reference_mesh() function. Now, it takes into 
account each of the steps as it makes the BoundBox for a triangle.

Modified Paths:
--------------
    branches/soc-2013-cycles_mblur/intern/cycles/bvh/bvh_build.cpp

Modified: branches/soc-2013-cycles_mblur/intern/cycles/bvh/bvh_build.cpp
===================================================================
--- branches/soc-2013-cycles_mblur/intern/cycles/bvh/bvh_build.cpp	2013-08-26 16:08:03 UTC (rev 59531)
+++ branches/soc-2013-cycles_mblur/intern/cycles/bvh/bvh_build.cpp	2013-08-26 17:50:16 UTC (rev 59532)
@@ -79,6 +79,22 @@
 			bounds.grow(co);
 		}
 
+		/* If the mesh has deformation blur, we need to take that into account. */
+		Attribute *attr = mesh->attributes.find(ATTR_STD_DMOTION);
+		if (attr) {
+			size_t mesh_size = mesh->verts.size();
+			size_t steps = mesh->mblur_steps - 1;
+			float3 *vert_steps = attr->data_float3();
+
+			/* Go through all of the steps and grow the bounds
+			 * for each step of the triangle. */
+			for (size_t i = 0; i < steps; i++) {
+				for (size_t k = 0; k < 3; k++) {
+					bounds.grow(vert_steps[i * mesh_size + t.v[k]]);
+				}
+			}
+		}
+
 		if(bounds.valid()) {
 			references.push_back(BVHReference(bounds, j, i, ~0));
 			root.grow(bounds);