From 8030cb03fd41673b7d687128782a0e21417baaea Mon Sep 17 00:00:00 2001
From: Ton Roosendaal <ton@blender.org>
Date: Wed, 12 Nov 2008 19:03:50 +0000
Subject: 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. :)
---
 source/blender/nodes/intern/TEX_nodes/TEX_mixRgb.c | 81 ++++++++++++++++++++++
 1 file changed, 81 insertions(+)
 create mode 100644 source/blender/nodes/intern/TEX_nodes/TEX_mixRgb.c

(limited to 'source/blender/nodes/intern/TEX_nodes/TEX_mixRgb.c')

diff --git a/source/blender/nodes/intern/TEX_nodes/TEX_mixRgb.c b/source/blender/nodes/intern/TEX_nodes/TEX_mixRgb.c
new file mode 100644
index 00000000000..b1ccb7a3d07
--- /dev/null
+++ b/source/blender/nodes/intern/TEX_nodes/TEX_mixRgb.c
@@ -0,0 +1,81 @@
+/**
+ *
+ * ***** 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) 2005 Blender Foundation.
+ * All rights reserved.
+ *
+ * The Original Code is: all of this file.
+ *
+ * Contributor(s): none yet.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include "../TEX_util.h"
+
+
+/* **************** MIX RGB ******************** */
+static bNodeSocketType inputs[]= {
+	{ SOCK_VALUE, 1, "Factor", 0.5f, 0.0f, 0.0f, 0.0f, 0.0f, 1.0f },
+	{ SOCK_RGBA,  1, "Color1", 0.5f, 0.5f, 0.5f, 1.0f, 0.0f, 1.0f },
+	{ SOCK_RGBA , 1, "Color2", 0.5f, 0.5f, 0.5f, 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 colorfn(float *out, float *coord, bNode *node, bNodeStack **in, short thread)
+{
+	float fac  = tex_input_value(in[0], coord, thread);
+	float col1[4], col2[4];
+	
+	tex_input_rgba(col1, in[1], coord, thread);
+	tex_input_rgba(col2, in[2], coord, thread);
+	
+	CLAMP(fac, 0.0f, 1.0f);
+	
+	QUATCOPY(out, col1);
+	ramp_blend(node->custom1, out, out+1, out+2, fac, col2);
+}
+
+static void exec(void *data, bNode *node, bNodeStack **in, bNodeStack **out)
+{
+	tex_output(node, in, out[0], &colorfn);
+	
+	tex_do_preview(node, out[0], data);
+}
+
+bNodeType tex_node_mix_rgb= {
+	/* *next,*prev */	NULL, NULL,
+	/* type code   */	TEX_NODE_MIX_RGB,
+	/* name        */	"Mix",
+	/* width+range */	100, 60, 150,
+	/* 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
+	
+};
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