Patch #7897 Texture Nodes!

Robin (Frrr) Allen did a decent job on this, so we can also welcome him
as a member in the svn committers team to maintain it!

I do the first commit with some minor fixes:
- get Makefiles work
- fix rounding issue with tiles on unit faces
- removed UI includes from tex node

A nice doc in wiki is here:
http://wiki.blender.org/index.php/User:Frr/TexnodeManual

On the todo for Robin is:
- When using one or more Texture-input nodes, you cannot edit them by activating
  (as works now for Material nodes).
- The new "output node" option fails on the default case, when only one
  output node is active. It then shows often a blank menu. Will get fixed asap.
- When using a NodeTree-Texture as input node, the menu for 'active output'
  should not show. NodeTree should ignore other nodetrees to keep things sane
  for now.
- On a future todo is proper usage of "Dxt" and "Dyt" texture vectors for
  superior antialising of checkers/bricks.

General note; I know people are dying to get a full integrated shader system
with nodes. In theory we could merge this with Material Nodetrees... but I 
rather wait for a solid and very well thought out design proposal for this, 
also including design ideas for unifying with a shader language (GPU, CPU).
For the time being this is a nice extension of current textures. :)

1 files changed, 14 insertions, 0 deletions

diff --git a/source/blender/blenkernel/intern/texture.c b/source/blender/blenkernel/intern/texture.c
index ab9e6f9af41..52b88de06e0 100644
--- a/source/blender/blenkernel/intern/texture.c
+++ b/source/blender/blenkernel/intern/texture.c
@@ -421,6 +421,11 @@ void free_texture(Tex *tex)
 	BKE_previewimg_free(&tex->preview);
 	BKE_icon_delete((struct ID*)tex);
 	tex->id.icon_id = 0;
+	
+	if(tex->nodetree) {
+		ntreeFreeTree(tex->nodetree);
+		MEM_freeN(tex->nodetree);
+	}
 }
 
 /* ------------------------------------------------------------------------- */
@@ -578,6 +583,11 @@ Tex *copy_texture(Tex *tex)
 	
 	if(tex->preview) texn->preview = BKE_previewimg_copy(tex->preview);
 
+	if(tex->nodetree) {
+		ntreeEndExecTree(tex->nodetree);
+		texn->nodetree= ntreeCopyTree(tex->nodetree, 0); /* 0 == full new tree */
+	}
+	
 	return texn;
 }
 
@@ -728,6 +738,10 @@ void autotexname(Tex *tex)
 	char di[FILE_MAXDIR], fi[FILE_MAXFILE];
 	
 	if(tex) {
+		if(tex->use_nodes) {
+			new_id(&G.main->tex, (ID *)tex, "Noddy");
+		}
+		else
 		if(tex->type==TEX_IMAGE) {
 			ima= tex->ima;
 			if(ima) {