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, 104 insertions, 0 deletions

diff --git a/source/blender/nodes/intern/TEX_nodes/TEX_hueSatVal.c b/source/blender/nodes/intern/TEX_nodes/TEX_hueSatVal.c
new file mode 100644
index 00000000000..d1a33896fc3
--- /dev/null
+++ b/source/blender/nodes/intern/TEX_nodes/TEX_hueSatVal.c
@@ -0,0 +1,104 @@
+/**
+ *
+ * ***** BEGIN GPL LICENSE BLOCK *****
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version. 
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ *
+ * The Original Code is Copyright (C) 2006 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): Juho Vepsäläinen
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include "../TEX_util.h"
+
+
+static bNodeSocketType inputs[]= {
+	{	SOCK_VALUE, 1, "Hue",			0.5f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
+	{	SOCK_VALUE, 1, "Saturation",		1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 2.0f},
+	{	SOCK_VALUE, 1, "Value",			1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 2.0f},
+	{	SOCK_VALUE, 1, "Fac",			1.0f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f},
+	{	SOCK_RGBA, 1, "Color",			0.8f, 0.8f, 0.8f, 1.0f, 0.0f, 1.0f},
+	{	-1, 0, ""	}
+};
+static bNodeSocketType outputs[]= {
+	{	SOCK_RGBA, 0, "Color",			0.0f, 0.0f, 0.0f, 1.0f, 0.0f, 1.0f},
+	{	-1, 0, ""	}
+};
+
+static void do_hue_sat_fac(bNode *node, float *out, float hue, float sat, float val, float *in, float fac)
+{
+	if(fac != 0 && (hue != 0.5f || sat != 1 || val != 1)) {
+		float col[3], hsv[3], mfac= 1.0f - fac;
+		
+		rgb_to_hsv(in[0], in[1], in[2], hsv, hsv+1, hsv+2);
+		hsv[0]+= (hue - 0.5f);
+		if(hsv[0]>1.0) hsv[0]-=1.0; else if(hsv[0]<0.0) hsv[0]+= 1.0;
+		hsv[1]*= sat;
+		if(hsv[1]>1.0) hsv[1]= 1.0; else if(hsv[1]<0.0) hsv[1]= 0.0;
+		hsv[2]*= val;
+		if(hsv[2]>1.0) hsv[2]= 1.0; else if(hsv[2]<0.0) hsv[2]= 0.0;
+		hsv_to_rgb(hsv[0], hsv[1], hsv[2], col, col+1, col+2);
+		
+		out[0]= mfac*in[0] + fac*col[0];
+		out[1]= mfac*in[1] + fac*col[1];
+		out[2]= mfac*in[2] + fac*col[2];
+	}
+	else {
+		QUATCOPY(out, in);
+	}
+}
+
+static void colorfn(float *out, float *coord, bNode *node, bNodeStack **in, short thread)
+{	
+	float in0 = tex_input_value(in[0], coord, thread);
+	float in1 = tex_input_value(in[1], coord, thread);
+	float in2 = tex_input_value(in[2], coord, thread);
+	float in3 = tex_input_value(in[3], coord, thread);
+	
+	float in4[4];
+	tex_input_rgba(in4, in[4], coord, thread);
+	
+	do_hue_sat_fac(node, out, in0, in1, in2, in4, in3);
+}
+
+static void exec(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
+{
+	tex_output(node, in, out[0], &colorfn);
+}
+
+bNodeType tex_node_hue_sat= {
+	/* *next,*prev */	NULL, NULL,
+	/* type code   */	TEX_NODE_HUE_SAT,
+	/* name        */	"Hue Saturation Value",
+	/* width+range */	150, 80, 250,
+	/* class+opts  */	NODE_CLASS_OP_COLOR, NODE_OPTIONS,
+	/* input sock  */	inputs,
+	/* output sock */	outputs,
+	/* storage     */	"", 
+	/* execfunc    */	exec,
+	/* butfunc     */	NULL,
+	/* initfunc    */	NULL,
+	/* freestoragefunc    */	NULL,
+	/* copystoragefunc    */	NULL,
+	/* id          */	NULL
+	
+};
+
+