Patch #18015, adds "Value to Normal" node

source/blender/blenkernel/BKE_node.h

@@ -405,6 +405,7 @@ struct TexResult;
 #define TEX_NODE_DISTANCE   118
 #define TEX_NODE_COMPOSE    119
 #define TEX_NODE_DECOMPOSE  120
+#define TEX_NODE_VALTONOR   121
 
 /* 201-299 reserved. Use like this: TEX_NODE_PROC + TEX_CLOUDS, etc */
 #define TEX_NODE_PROC      200

source/blender/blenkernel/intern/node.c

@@ -2882,6 +2882,7 @@ static void registerTextureNodes(ListBase *ntypelist)
 	nodeRegisterType(ntypelist, &tex_node_mix_rgb);
 	nodeRegisterType(ntypelist, &tex_node_valtorgb);
 	nodeRegisterType(ntypelist, &tex_node_rgbtobw);
+	nodeRegisterType(ntypelist, &tex_node_valtonor);
 	nodeRegisterType(ntypelist, &tex_node_curve_rgb);
 	nodeRegisterType(ntypelist, &tex_node_curve_time);
 	nodeRegisterType(ntypelist, &tex_node_invert);

source/blender/nodes/TEX_node.h

@@ -41,6 +41,7 @@
 extern bNodeType tex_node_math;
 extern bNodeType tex_node_mix_rgb;
 extern bNodeType tex_node_valtorgb;
+extern bNodeType tex_node_valtonor;
 extern bNodeType tex_node_rgbtobw;
 extern bNodeType tex_node_output;
 extern bNodeType tex_node_viewer;

source/blender/nodes/intern/TEX_nodes/TEX_valToNor.c

@@ -0,0 +1,92 @@
+/**
+ *
+ * ***** 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): Jucas.
+ *
+ * ***** END GPL LICENSE BLOCK *****
+ */
+
+#include "../TEX_util.h"
+
+static bNodeSocketType inputs[]= { 
+	{ SOCK_VALUE, 1, "Val",   0.0f,   0.0f, 0.0f, 1.0f,  0.0f,   1.0f },
+	{ SOCK_VALUE, 1, "Nabla", 0.025f, 0.0f, 0.0f, 0.0f,  0.001f, 0.1f },
+	{ -1, 0, "" } 
+};
+
+static bNodeSocketType outputs[]= { 
+	{ SOCK_VECTOR, 0, "Normal", 0.0f, 0.0f, 1.0f, 0.0f, 0.0f, 1.0f }, 
+	{ -1, 0, "" } 
+};
+
+static void normalfn(float *out, float *coord, bNode *node, bNodeStack **in, short thread)
+{
+	float new_coord[3];
+
+	float nabla = tex_input_value(in[1], coord, thread);	
+	float val;
+	float nor[2];
+
+	val = tex_input_value(in[0], coord, thread);
+
+	new_coord[0] = coord[0] + nabla;
+	new_coord[1] = coord[1];
+	new_coord[2] = coord[2];
+	nor[0] = tex_input_value(in[0], new_coord, thread);
+
+	new_coord[0] = coord[0];
+	new_coord[1] = coord[1] + nabla;
+	nor[1] = tex_input_value(in[0], new_coord, thread);
+	
+	new_coord[1] = coord[1];
+	new_coord[2] = coord[2] + nabla;
+	nor[2] = tex_input_value(in[0], new_coord, thread);
+
+	out[0] = val-nor[0];
+	out[1] = val-nor[1];
+	out[2] = val-nor[2];
+}
+static void exec(void *data, bNode *node, bNodeStack **in, bNodeStack **out) 
+{
+	tex_output(node, in, out[0], &normalfn);
+	
+	tex_do_preview(node, out[0], data);
+}
+
+bNodeType tex_node_valtonor = {
+	/* *next,*prev     */ NULL, NULL,
+	/* type code       */ TEX_NODE_VALTONOR, 
+	/* name            */ "Value to Normal", 
+	/* width+range     */ 90, 80, 100, 
+	/* class+opts      */ NODE_CLASS_CONVERTOR, NODE_OPTIONS, 
+	/* input sock      */ inputs, 
+	/* output sock     */ outputs, 
+	/* storage         */ "", 
+	/* execfunc        */ exec,
+	/* butfunc         */ NULL,
+	/* initfunc        */ NULL,
+	/* freestoragefunc */ NULL,
+	/* copystoragefunc */ NULL,
+	/* id              */ NULL
+};
+