text: /*
   * $Id: node_composite_normal.c 39944 2011-09-05 22:04:30Z gsrb3d $
   *
   * ***** 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
   *
   * The Original Code is Copyright (C) 2006 Blender Foundation.
   * All rights reserved.
   *
   * The Original Code is: all of this file.
   *
   * Contributor(s): none yet.
   *
   * ***** END GPL LICENSE BLOCK *****
   */
  
  /** \file blender/nodes/composite/nodes/node_composite_normal.c
   *  \ingroup cmpnodes
   */
  
  
  #include "node_composite_util.h"
  
  
  /* **************** NORMAL  ******************** */
  static bNodeSocketTemplate cmp_node_normal_in[]= {
  	{	SOCK_VECTOR, 1, "Normal",	0.0f, 0.0f, 0.0f, 1.0f, -1.0f, 1.0f, PROP_DIRECTION},
  	{	-1, 0, ""	}
  };
  
  static bNodeSocketTemplate cmp_node_normal_out[]= {
  	{	SOCK_VECTOR, 0, "Normal"},
  	{	SOCK_FLOAT, 0, "Dot"},
  	{	-1, 0, ""	}
  };
  
  static void do_normal(bNode *node, float *out, float *in)
  {
  	bNodeSocket *sock= node->outputs.first;
  	float *nor= ((bNodeSocketValueVector*)sock->default_value)->value;
  	
  	/* render normals point inside... the widget points outside */
  	out[0]= -INPR(nor, in);
  }
  
  /* generates normal, does dot product */
  static void node_composit_exec_normal(void *UNUSED(data), bNode *node, bNodeStack **in, bNodeStack **out)
  {
  	bNodeSocket *sock= node->outputs.first;
  	float *nor= ((bNodeSocketValueVector*)sock->default_value)->value;
  	/* stack order input:  normal */
  	/* stack order output: normal, value */
  	
  	/* input no image? then only vector op */
  	if(in[0]->data==NULL) {
  		VECCOPY(out[0]->vec, nor);
  		/* render normals point inside... the widget points outside */
  		out[1]->vec[0]= -INPR(out[0]->vec, in[0]->vec);
  	}
  	else if(out[1]->hasoutput) {
  		/* make output size of input image */
  		CompBuf *cbuf= in[0]->data;
  		CompBuf *stackbuf= alloc_compbuf(cbuf->x, cbuf->y, CB_VAL, 1); /* allocs */
  		
  		composit1_pixel_processor(node, stackbuf, in[0]->data, in[0]->vec, do_normal, CB_VEC3);
  		
  		out[1]->data= stackbuf;
  	}
  	
  	
  }
  
  static void init(bNodeTree *UNUSED(ntree), bNode *node, bNodeTemplate *UNUSED(ntemp))
  {
  	bNodeSocket *sock= node->outputs.first;
  	float *nor= ((bNodeSocketValueVector*)sock->default_value)->value;
  	
  	nor[0] = 0.0f;
  	nor[1] = 0.0f;
  	nor[2] = 1.0f;
  }
  
  void register_node_type_cmp_normal(ListBase *lb)
  {
  	static bNodeType ntype;
  
  	node_type_base(&ntype, CMP_NODE_NORMAL, "Normal", NODE_CLASS_OP_VECTOR, NODE_OPTIONS);
  	node_type_socket_templates(&ntype, cmp_node_normal_in, cmp_node_normal_out);
  	node_type_init(&ntype, init);
  	node_type_size(&ntype, 100, 60, 200);
  	node_type_exec(&ntype, node_composit_exec_normal);
  
  	nodeRegisterType(lb, &ntype);
  }
  
  
  