/*
 * 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.
 *
 * Copyright 2011, Blender Foundation.
 */

#include "COM_NormalNode.h"
#include "COM_ExecutionSystem.h"
#include "BKE_node.h"
#include "COM_DotproductOperation.h"
#include "COM_SetVectorOperation.h"

NormalNode::NormalNode(bNode *editorNode) : Node(editorNode)
{
  /* pass */
}

void NormalNode::convertToOperations(NodeConverter &converter,
                                     const CompositorContext & /*context*/) const
{
  NodeInput *inputSocket = this->getInputSocket(0);
  NodeOutput *outputSocket = this->getOutputSocket(0);
  NodeOutput *outputSocketDotproduct = this->getOutputSocket(1);

  SetVectorOperation *operationSet = new SetVectorOperation();
  float normal[3];
  outputSocket->getEditorValueVector(normal);
  /* animation can break normalization, this restores it */
  normalize_v3(normal);
  operationSet->setX(normal[0]);
  operationSet->setY(normal[1]);
  operationSet->setZ(normal[2]);
  operationSet->setW(0.0f);
  converter.addOperation(operationSet);

  converter.mapOutputSocket(outputSocket, operationSet->getOutputSocket(0));

  DotproductOperation *operation = new DotproductOperation();
  converter.addOperation(operation);

  converter.mapInputSocket(inputSocket, operation->getInputSocket(0));
  converter.addLink(operationSet->getOutputSocket(0), operation->getInputSocket(1));
  converter.mapOutputSocket(outputSocketDotproduct, operation->getOutputSocket(0));
}
