Normal map tangents are now not always averaged at vertices anymore,

but only when the UV's are connected. That fixes some artifacts when
baking and using tangent space normal maps. It does mean increased
memory usage because it now stores 4 tangents per face like UV's,
and increased processing time, but there's no simple way around that.

1 files changed, 2 insertions, 0 deletions

diff --git a/source/blender/render/intern/include/renderdatabase.h b/source/blender/render/intern/include/renderdatabase.h
index a204aa7876b..7576be6e0e6 100644
--- a/source/blender/render/intern/include/renderdatabase.h
+++ b/source/blender/render/intern/include/renderdatabase.h
@@ -64,6 +64,7 @@ typedef struct VlakTableNode {
 	struct MCol *mcol;
 	int totmtface, totmcol;
 	float *surfnor;
+	float *tangent;
 	struct RadFace **radface;
 } VlakTableNode;
 
@@ -112,6 +113,7 @@ float *RE_vertren_get_winspeed(struct ObjectInstanceRen *obi, struct VertRen *ve
 struct MTFace *RE_vlakren_get_tface(struct ObjectRen *obr, VlakRen *ren, int n, char **name, int verify);
 struct MCol *RE_vlakren_get_mcol(struct ObjectRen *obr, VlakRen *ren, int n, char **name, int verify);
 float *RE_vlakren_get_surfnor(struct ObjectRen *obr, VlakRen *ren, int verify);
+float *RE_vlakren_get_nmap_tangent(struct ObjectRen *obr, VlakRen *ren, int verify);
 RadFace **RE_vlakren_get_radface(struct ObjectRen *obr, VlakRen *ren, int verify);
 int RE_vlakren_get_normal(struct Render *re, struct ObjectInstanceRen *obi, struct VlakRen *vlr, float *nor);