Orange; WIP commit for inclusion of "Tangent" vector in rendering.

This first implementation only supports it for Meshes with UV maps, and
only tangents in V direction.

Tangent diffuse:
http://www.blender.org/bf/0001_0080.avi
Tangent spec, diffuse, and bump:
http://www.blender.org/bf/20001_0080.avi

NOTE: since UV coordinates are still very badly subsurfed, this won't work
well for subsurf meshes... on the todo.

On the todo;
- generate tangents for meshes without UV (with some options)
- use tangents from Curve/Surface
- add the Ashkimin shader from tracker

-----

Important bugfix; curves didn't render anymore since yesterday. :)

1 files changed, 1 insertions, 2 deletions

diff --git a/source/blender/blenkernel/BKE_utildefines.h b/source/blender/blenkernel/BKE_utildefines.h
index f0b05802e97..f784973708d 100644
--- a/source/blender/blenkernel/BKE_utildefines.h
+++ b/source/blender/blenkernel/BKE_utildefines.h
@@ -1,5 +1,3 @@
-/* util defines  -- might go away ?*/
-
 /* 
 	$Id$
 
@@ -103,6 +101,7 @@
 
 #define VECADD(v1,v2,v3) 	{*(v1)= *(v2) + *(v3); *(v1+1)= *(v2+1) + *(v3+1); *(v1+2)= *(v2+2) + *(v3+2);}
 #define VECSUB(v1,v2,v3) 	{*(v1)= *(v2) - *(v3); *(v1+1)= *(v2+1) - *(v3+1); *(v1+2)= *(v2+2) - *(v3+2);}
+#define VECADDFAC(v1,v2,v3,fac) {*(v1)= *(v2) + *(v3)*(fac); *(v1+1)= *(v2+1) + *(v3+1)*(fac); *(v1+2)= *(v2+2) + *(v3+2)*(fac);}
 
 #define INPR(v1, v2)		( (v1)[0]*(v2)[0] + (v1)[1]*(v2)[1] + (v1)[2]*(v2)[2] )