TextureControl.cc 58.1 KB
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//=============================================================================
//
//                               OpenFlipper
//        Copyright (C) 2008 by Computer Graphics Group, RWTH Aachen
//                           www.openflipper.org
//
//-----------------------------------------------------------------------------
//
//                                License
//
//  OpenFlipper is free software: you can redistribute it and/or modify
//  it under the terms of the GNU Lesser General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
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//
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//  OpenFlipper 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 Lesser General Public License for more details.
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//
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//  You should have received a copy of the GNU Lesser General Public License
//  along with OpenFlipper.  If not, see <http://www.gnu.org/licenses/>.
//
//-----------------------------------------------------------------------------
//
//   $Revision$
//   $Author$
//   $Date$
//
//=============================================================================




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#include <QtGui>

#include "TextureControl.hh"

#include <iostream>
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#include <ACG/GL/GLState.hh>
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#include "OpenFlipper/BasePlugin/PluginFunctions.hh"
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#include "OpenFlipper/BasePlugin/PluginFunctionsViewControls.hh"
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#include "OpenFlipper/common/GlobalOptions.hh"

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#include <math.h>

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#define TEXTUREDATA "TextureData"



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void TextureControlPlugin::slotTextureAdded( QString _textureName , QString _filename , uint _dimension , int _id)
{
  // Get the new object
  BaseObjectData* obj;
  if (! PluginFunctions::getObject(  _id , obj ) ) {
    emit log(LOGERR,"Unable to get Object for id " + QString::number(_id) );
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    return;
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  }

  // Get Texture data for this object or create one if it does not exist
  TextureData* texData = dynamic_cast< TextureData* > ( obj->objectData(TEXTUREDATA) );
  if (texData == 0){
    texData = new TextureData();
    obj->setObjectData(TEXTUREDATA, texData);
  }

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  if ( texData->textureExists(_textureName) ) {
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    emit log(LOGERR,"Trying to add already existing texture " + _textureName + " for object " + QString::number(_id) );
    return;
  }
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  // ================================================================================
  // Get the image file
  // ================================================================================

  QImage textureImage;
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  if ( !getImage(_filename,textureImage) )
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    emit log(LOGERR, "slotTextureAdded : Cannot load texture '" + _textureName + "'. File not found '" + _filename + "'");

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  // ================================================================================
  // Add the texture to the texture node and get the corresponding id
  // ================================================================================
  GLuint glName = 0;

  //inform textureNode about the new texture
  if( obj->dataType( DATA_TRIANGLE_MESH ) )
    glName = PluginFunctions::triMeshObject(obj)->textureNode()->add_texture(textureImage);

  if ( obj->dataType( DATA_POLY_MESH ) )
    glName = PluginFunctions::polyMeshObject(obj)->textureNode()->add_texture(textureImage);

  // ================================================================================
  // Store texture information in objects metadata
  // ================================================================================

  if (glName == 0) {
    emit log(LOGERR,"Unable to bind texture!");
    return;
  }

  texData->addTexture(_textureName,_filename,_dimension,glName);
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  texData->setImage(_textureName,textureImage);
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  texData->texture(_textureName).disable();
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}

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void TextureControlPlugin::slotTextureAdded( QString _textureName , QString _filename , uint _dimension)
{
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  // Add this texture to the list of global textures
  if ( ! globalTextures_.textureExists(_textureName) ) {
    globalTextures_.addTexture(_textureName,_filename,_dimension,0);
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    globalTextures_.texture(_textureName).disable();
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    QImage textureImage;
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    if ( !getImage(_filename,textureImage) )
      emit log(LOGERR, "Cannot load texture '" + _textureName + "'. File not found '" + _filename + "'");

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    globalTextures_.texture(_textureName).textureImage = textureImage;

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  } else {
    emit log(LOGERR,"Trying to add already existing global texture " + _textureName );
    return;
  }
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  // Add a new entry to the global Texture menu
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  QAction* new_texture = new QAction(_textureName, this);
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  new_texture->setStatusTip(tr("Switch all objects to this Texture ( if available )"));
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  new_texture->setCheckable(true);
  actionGroup_->addAction(new_texture);
  textureMenu_->addAction(new_texture);
  new_texture->setChecked(true);
  textureActions_.push_back(new_texture);
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}
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void TextureControlPlugin::slotMultiTextureAdded( QString _textureGroup , QString _name , QString _filename , int _id , int& _textureId ) {
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   // Get the new object
  BaseObjectData* obj;
  if (! PluginFunctions::getObject(  _id , obj ) ) {
    emit log(LOGERR,"Unable to get Object for id " + QString::number(_id) );
  }

  // Check if we support this kind of data
  if ( !obj->dataType(DATA_TRIANGLE_MESH) && !obj->dataType(DATA_POLY_MESH) ) {
      emit log(LOGERR,"Trying to add textures to object failed because of unsupported object type");
      return;
  }

  // Get Texture data for this object or create one if it does not exist
  TextureData* texData = dynamic_cast< TextureData* > ( obj->objectData(TEXTUREDATA) );
  if (texData == 0){
    texData = new TextureData();
    obj->setObjectData(TEXTUREDATA, texData);
  }

  if ( !texData->textureExists( _textureGroup ) )
    texData->addMultiTexture( _textureGroup );

  // Add the texture
  slotTextureAdded( _name , _filename , 2 , _id);

  // Get the id of the new texture
  _textureId = -1;
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  _textureId = texData->texture(_name).id();
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  //hide the texture (its accessible through the multiTexture)
  texData->texture(_name).hidden( true );

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  QImage textureImage;
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  if ( !getImage(_filename,textureImage) )
    emit log(LOGERR, "Cannot load multiTexture '" + _textureGroup + "'. File not found '" + _filename + "'");

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  texData->texture(_name).textureImage = textureImage;

  // Store the new texture in the list of this textureGroup
  if ( _textureId != -1 ) {
    texData->texture(_textureGroup).multiTextureList << _name ;
  } else {
    emit log(LOGERR,"Error when getting internal id of new multitexture!");
  }

}

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bool TextureControlPlugin::getImage( QString _fileName, QImage& _image ) {
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  QString loadFilename;

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  if ( _fileName.startsWith("/") || _fileName.startsWith(".") )
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    loadFilename = _fileName;
  else
    loadFilename = OpenFlipper::Options::textureDirStr() + QDir::separator() + _fileName;

  if ( !_image.load( loadFilename ) ){
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    _image.load(OpenFlipper::Options::textureDirStr() + QDir::separator() + "unknown.png");
    return false;
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  }

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  return true;
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}

void TextureControlPlugin::addedEmptyObject( int _id ) {
  fileOpened(_id);
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}

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template< typename MeshT >
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void TextureControlPlugin::handleFileOpenTextures( MeshT*& _mesh , int _objectId ) {
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  // Get the new object
  BaseObjectData* obj;
  if (! PluginFunctions::getObject(  _objectId , obj ) ) {
    emit log(LOGERR,"Unable to get Object for id " + QString::number(_objectId) );
    return;
  }

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  // ================================================================================
  // Create a backup of the original per Vertex texture Coordinates
  // ================================================================================
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  OpenMesh::VPropHandleT< typename MeshT::TexCoord2D > oldVertexCoords;
  _mesh->add_property(oldVertexCoords,"Original Per Vertex Texture Coords");
  for ( TriMesh::VertexIter v_it = _mesh->vertices_begin(); v_it != _mesh->vertices_end(); ++v_it)
    _mesh->property(oldVertexCoords, v_it ) =  _mesh->texcoord2D( v_it );

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  slotTextureAdded("Original Per Vertex Texture Coords","unknown.png",2,_objectId);
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  slotSetTextureMode("Original Per Vertex Texture Coords","type=vertexbased",_objectId);
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  // ================================================================================
  // Create a backup of the original per Face texture Coordinates
  // ================================================================================
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  OpenMesh::HPropHandleT< typename MeshT::TexCoord2D > oldHalfedgeCoords;
  _mesh->add_property(oldHalfedgeCoords,"Original Per Face Texture Coords");
  for ( TriMesh::HalfedgeIter he_it = _mesh->halfedges_begin(); he_it != _mesh->halfedges_end(); ++he_it)
    _mesh->property(oldHalfedgeCoords, he_it ) =  _mesh->texcoord2D( he_it );

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  slotTextureAdded("Original Per Face Texture Coords","unknown.png",2,_objectId);
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  slotSetTextureMode("Original Per Face Texture Coords","type=halfedgebased",_objectId);
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  // ================================================================================
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  // If this property is available we have a mapping between face_index_property and
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  // available textures stored in the map. So we have to enable multi texturing
  // ================================================================================
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  OpenMesh::MPropHandleT< std::map< int, std::string > > property;
  if ( _mesh->get_property_handle(property,"TextureMapping") ) {

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    // ================================================================================
    // As internal texture indices might differ from the available ones loaded from files,
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    // We have to remap them after loading the textures!
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    // ================================================================================
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    std::map< int,int > newMapping;
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    // zero ( no texture ) always maps to to zero
    newMapping[0]=0;

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    // TODO : If only one Texture, use single Texturing mode
    if ( true ) {
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      std::cerr <<  "Size : " << _mesh->property(property).size() << std::endl;
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      // Assume multiTexture Mode now and load the Textures
      for ( std::map< int, std::string >::iterator texture  = _mesh->property(property).begin();
                                                   texture != _mesh->property(property).end(); texture++ ) {
        int textureId = -1;
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        std::cerr << "Generating Texture " << texture->second.c_str() << std::endl;
        QString textureBlock = QString(texture->second.c_str());


        QStringList options = textureBlock.split(" ",QString::SkipEmptyParts);

        while ( options.size() > 1 ) {
          if ( options[0] == "-blendu" ) {
          } else if ( options[0] == "-blendu" ) {
            options.pop_front();
            options.pop_front();
          } else if ( options[0] == "-blendv" ) {
            options.pop_front();
            options.pop_front();
          } else if ( options[0] == "-cc" ) {
            options.pop_front();
            options.pop_front();
          } else if ( options[0] == "-clamp" ) {
            options.pop_front();
            options.pop_front();
          } else if ( options[0] == "-mm" ) {
            options.pop_front();
            options.pop_front();
            options.pop_front();
          } else if ( options[0] == "-o" ) {
            options.pop_front();
            options.pop_front();
            options.pop_front();
            options.pop_front();
          } else if ( options[0] == "-s" ) {
            options.pop_front();
            options.pop_front();
            options.pop_front();
            options.pop_front();
          } else if ( options[0] == "-t" ) {
            options.pop_front();
            options.pop_front();
            options.pop_front();
            options.pop_front();
          } else if ( options[0] == "-texres" ) {
            options.pop_front();
            options.pop_front();
          } else  {
            break;
          }
        }

        QString fullName = obj->path() + QDir::separator() + options.join(" ");

        std::cerr << "rest " << fullName.toStdString() << std::endl;


        //
        QFileInfo info(fullName);
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        if ( info.exists() )
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          slotMultiTextureAdded("OBJ Data",fullName , fullName, _objectId, textureId );
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        else {
          emit log(LOGWARN,"Unable to load texture image " + QString(texture->second.c_str()));
          slotMultiTextureAdded("OBJ Data","Unknown Texture image " + QString::number(textureId), "unknown.png", _objectId, textureId );
        }
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        newMapping[texture->first] = textureId;
      }

      // Convert the indices stored in the mesh to the actual ones used for rendering
      OpenMesh::FPropHandleT< int > newIndexProperty;
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      if (! _mesh->get_property_handle(newIndexProperty,"TextureControl: OriginalFileIndexMapping") )
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        _mesh->add_property(newIndexProperty,"TextureControl: OriginalFileIndexMapping");

      for ( TriMesh::FaceIter f_it = _mesh->faces_begin(); f_it != _mesh->faces_end(); ++f_it)
        _mesh->property(newIndexProperty, f_it ) =  newMapping[_mesh->texture_index( f_it )];

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      // =================================================================================================
      // We use a different property for storing the IndexProperty to prevent overwriting the original one
      // =================================================================================================
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      slotSetTextureMode("OBJ Data","indexProperty=TextureControl: OriginalFileIndexMapping", _objectId);
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      doSwitchTexture("OBJ Data",_objectId);
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    }
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  }

}

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void TextureControlPlugin::fileOpened( int _id ) {
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  // TODO:: Store original texture coords in a new property!
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  // Get the new object
  BaseObjectData* obj;
  if (! PluginFunctions::getObject(  _id , obj ) ) {
    emit log(LOGERR,"Unable to get Object for id " + QString::number(_id) );
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    return;
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  }

  // Check if we support this kind of data
  if ( !obj->dataType(DATA_TRIANGLE_MESH) && !obj->dataType(DATA_POLY_MESH) ) {
      return;
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  }

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  // Get Texture data for this object or create one if it does not exist
  TextureData* texData = dynamic_cast< TextureData* > ( obj->objectData(TEXTUREDATA) );
  if (texData == 0){
    texData = new TextureData();
    obj->setObjectData(TEXTUREDATA, texData);
  }

  // Iterate over all available global textures and add them to the object
  for ( uint i = 0 ; i < globalTextures_.textures().size() ; ++i) {

    // ================================================================================
    // Get the image file
    // ================================================================================

    QImage textureImage;
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    if ( !getImage(globalTextures_.textures()[i].filename(),textureImage) )
    emit log(LOGERR, "Cannot load global texture '" + globalTextures_.textures()[i].name() +
                     "'. File not found '" + globalTextures_.textures()[i].filename() + "'");
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    // ================================================================================
    // Add the texture to the texture node and get the corresponding id
    // ================================================================================
    GLuint glName = 0;

    //inform textureNode about the new texture
    if( obj->dataType( DATA_TRIANGLE_MESH ) )
      glName = PluginFunctions::triMeshObject(obj)->textureNode()->add_texture(textureImage);

    if ( obj->dataType( DATA_POLY_MESH ) )
      glName = PluginFunctions::polyMeshObject(obj)->textureNode()->add_texture(textureImage);

    // ================================================================================
    // Store texture information in objects metadata
    // ================================================================================
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    if (glName != 0) {
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      texData->addTexture(globalTextures_.textures()[i], glName);
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      texData->setImage(globalTextures_.textures()[i].name(),textureImage);
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    }
    else {
      emit log(LOGERR,"Unable to bind Texture");
      continue;
    }

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    // ================================================================================
    // Update texture mapping in meshNode
    // ================================================================================
    if( obj->dataType( DATA_TRIANGLE_MESH ) ){
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      PluginFunctions::triMeshObject(obj)->meshNode()->set_texture_map( 0 );
      PluginFunctions::triMeshObject(obj)->meshNode()->set_property_map( 0 );
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    }

    if ( obj->dataType( DATA_POLY_MESH ) ){
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      PluginFunctions::polyMeshObject(obj)->meshNode()->set_texture_map( 0 );
      PluginFunctions::polyMeshObject(obj)->meshNode()->set_property_map( 0 );
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    }

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  }
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  // Check if the file contains a texture map, store original textures and handle them before adding global textures
  if( obj->dataType( DATA_TRIANGLE_MESH ) ) {
    TriMesh* mesh = PluginFunctions::triMesh(obj);
    if ( mesh )
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      handleFileOpenTextures(mesh,_id);
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  } else if ( obj->dataType( DATA_POLY_MESH ) ) {
    PolyMesh* mesh = PluginFunctions::polyMesh(obj);
    if ( mesh )
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      handleFileOpenTextures(mesh,_id);
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  }

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}

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void TextureControlPlugin::slotTextureChangeImage( QString _textureName , QImage& _image , int _id ) {

  // ================================================================================
  // Get the new object
  // ================================================================================
  BaseObjectData* obj;
  if (! PluginFunctions::getObject(  _id , obj ) ) {
    emit log(LOGERR,"Unable to get Object for id " + QString::number(_id) );
  }

  // ================================================================================
  // Get Texture data for this object
  // ================================================================================
  TextureData* texData = dynamic_cast< TextureData* > ( obj->objectData(TEXTUREDATA) );

  if ( texData == 0 || ( !texData->textureExists(_textureName))  ) {
    emit log(LOGERR,"Texture does not exist: " + _textureName + " (objectid=" + QString::number(_id) + ")");
    return;
  }

  // ================================================================================
  // Update the image
  // ================================================================================
  Texture& texture = texData->texture(_textureName);
  texture.textureImage = _image;

  // ================================================================================
  // Flag dirty or update
  // ================================================================================

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  if( obj->dataType( DATA_TRIANGLE_MESH ) ) {
    PluginFunctions::triMeshObject(obj)->textureNode()->set_texture( _image , texData->texture(_textureName).glName());
  } else if ( obj->dataType( DATA_POLY_MESH ) ) {
    PluginFunctions::triMeshObject(obj)->textureNode()->set_texture( _image , texData->texture(_textureName).glName());
  }

  emit updateView();
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}

void TextureControlPlugin::slotTextureChangeImage( QString _textureName , QImage& _image ) {

  // ================================================================================
  // Update texture Image for global textures
  // ================================================================================
  if ( ! globalTextures_.textureExists(_textureName) ) {
    emit log(LOGERR,"Global texture does not exist: " + _textureName);
    return;
  }

  // ================================================================================
  // Update the image in the global texture
  // ================================================================================
  Texture& texture = globalTextures_.texture(_textureName);
  texture.textureImage = _image;

  // ================================================================================
  // check if the local textures need to be updated
  // ================================================================================
  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::ALL_OBJECTS) ; o_it != PluginFunctions::objectsEnd(); ++o_it){

    TextureData* texData = dynamic_cast< TextureData* > ( o_it->objectData(TEXTUREDATA) );
    if (texData != 0)
      if ( texData->textureExists(_textureName) ){
        Texture& localTex = texData->texture(_textureName);
        localTex.textureImage = _image;

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          if( o_it->dataType( DATA_TRIANGLE_MESH ) ) {
            PluginFunctions::triMeshObject(o_it)->textureNode()->set_texture( _image , texData->texture(_textureName).glName());
          } else if ( o_it->dataType( DATA_POLY_MESH ) ) {
            PluginFunctions::triMeshObject(o_it)->textureNode()->set_texture( _image , texData->texture(_textureName).glName());
          }
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      }
  }

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  emit updateView();

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}

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void TextureControlPlugin::slotTextureUpdated( QString _textureName , int _identifier ) {
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  // ================================================================================
  // Get updated object
  // ================================================================================
  BaseObjectData* obj;
  if (! PluginFunctions::getObject(  _identifier , obj ) ) {
    emit log(LOGERR,"Unable to get Object for id " + QString::number(_identifier) );
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    return;
  }
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  //skip object if its not a mesh
  if( !obj->dataType( DATA_TRIANGLE_MESH ) && !obj->dataType( DATA_POLY_MESH ) )
    return;

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  // ================================================================================
  // Get objects texture data and verify that texture exists
  // ================================================================================
  TextureData* texData = dynamic_cast< TextureData* > ( obj->objectData(TEXTUREDATA) );
  if (texData == 0){
    std::cerr << "Texture data not found!" << std::endl;
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    return;
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  }
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  // ================================================================================
  // Check if texture exists
  // ================================================================================
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  if ( ! texData->textureExists(_textureName) ) {
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    emit log(LOGERR,"Texture " + _textureName + " not found on object " + QString::number(_identifier) );
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    return;
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  }
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  // ================================================================================
  // If texture is not enabled, mark it as dirty and defer update to visualization update
  // ================================================================================
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  if ( ! texData->texture(_textureName).enabled() ) {
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    texData->texture(_textureName).setDirty();
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    return;
  }
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  // ================================================================================
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  // Enable the texture in texture node
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  // ================================================================================
  if( obj->dataType( DATA_TRIANGLE_MESH ) ) {
    TriMesh* mesh = PluginFunctions::triMesh(obj);
    doUpdateTexture(texData->texture(_textureName), *mesh);
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    // Texture has been bound to that object by slotAddTexture.. directly or by fileOpened from global texture
    // Just activate it
    PluginFunctions::triMeshObject(obj)->textureNode()->activateTexture(texData->texture(_textureName).glName() );
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    PluginFunctions::triMeshObject(obj)->textureNode()->set_repeat(texData->texture(_textureName).parameters.repeat);
  } else if ( obj->dataType( DATA_POLY_MESH ) ) {
    PolyMesh* mesh = PluginFunctions::polyMesh(obj);
    doUpdateTexture(texData->texture(_textureName), *mesh);
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    // Texture has been bound to that object by slotAddTexture.. directly or by fileOpened from global texture
    // Just activate it
    PluginFunctions::polyMeshObject(obj)->textureNode()->activateTexture(texData->texture(_textureName).glName() );
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    PluginFunctions::polyMeshObject(obj)->textureNode()->set_repeat(texData->texture(_textureName).parameters.repeat);
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  }
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  // ================================================================================
  // Mark texture as not dirty
  // ================================================================================
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  texData->texture(_textureName).clean();
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  // ================================================================================
  // Enable the right draw mode and update
  // ================================================================================
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  switchDrawMode( texData->texture( _textureName ).type() );
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}

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void TextureControlPlugin::slotUpdateTexture( QString _textureName , int _identifier) {
  if ( _textureName == "Reflection Lines" )
    slotTextureUpdated( _textureName , _identifier );

}

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template< typename MeshT >
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void TextureControlPlugin::doUpdateTexture ( Texture& _texture, MeshT& _mesh )
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{
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  if ( _texture.type() == HALFEDGEBASED ) {
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    if (_texture.dimension() == 1) {
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      OpenMesh::HPropHandleT< double > texture;
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	  if ( ! _mesh.get_property_handle(texture, _texture.name().toStdString() ) ) {
        emit log(LOGERR,"Unable to get property " + _texture.name() );
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        return;
      }

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      copyTexture(_texture, _mesh, texture);
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    } else if ( _texture.dimension() == 2 ) {
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      OpenMesh::HPropHandleT< OpenMesh::Vec2d > texture2D;
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	  if ( ! _mesh.get_property_handle( texture2D, _texture.name().toStdString() ) ) {
        emit log(LOGERR,"Unable to get property " + _texture.name() );
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        return;
      }

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      copyTexture( _texture, _mesh, texture2D);
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    } else
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      emit log(LOGERR, "Unsupported Texture Dimension " + QString::number(_texture.dimension() ) );
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  } else if ( _texture.type() == VERTEXBASED ) {
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    if ( _texture.dimension() == 1 ) {
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      OpenMesh::VPropHandleT< double > texture;
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	  if ( ! _mesh.get_property_handle(texture,_texture.name().toStdString() ) ) {
        emit log(LOGERR,"Unable to get property " + _texture.name() );
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        return;
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      }

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        copyTexture(_texture, _mesh, texture);
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      } else if ( _texture.dimension() == 2 ) {
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        OpenMesh::VPropHandleT< OpenMesh::Vec2d >  texture2D;
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		  if ( ! _mesh.get_property_handle(texture2D,_texture.name().toStdString() ) ) {
          emit log(LOGERR,"Unable to get property " + _texture.name() );
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          return;
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        }

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        copyTexture( _texture, _mesh, texture2D);
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      } /*else if ( textures_[_textureid].dimension == 3 ) {
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        OpenMesh::VPropHandleT< OpenMesh::Vec3d >  scalarField3D;
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        if ( ! _mesh.get_property_handle(scalarField3D,_texture.name) ) {
          emit log(LOGERR,"Unable to get property " + _texture.name );
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          return;
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        }
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        copyTexture(_textureid, _mesh, scalarField3D);
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      }*/ else
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        emit log(LOGERR, "Unsupported Texture Dimension " + QString::number(_texture.dimension() ) );
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    } else
      emit log(LOGERR, "Unsupported Texture type");
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}

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void TextureControlPlugin::computeValue(Texture& _texture, double _min, double _max, double& _value) {
   const bool clamp         = _texture.parameters.clamp ;
   const bool center        = _texture.parameters.center;
   const double max_val     = _texture.parameters.max_val;
   const bool abs           = _texture.parameters.abs;
   const double clamp_max   = _texture.parameters.clamp_max;
   const double clamp_min   = _texture.parameters.clamp_min;
   const bool scale         = _texture.parameters.scale;
   const double scaleFactor = fabs(_max) + fabs(_min);
   const bool repeat        = _texture.parameters.repeat;
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   // Use absolute value as requested by plugin
   if ( abs )
      _value = fabs(_value);
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   // Clamp if requested
   if ( clamp ) {
      if ( _value > clamp_max )
         _value = clamp_max;
      if (_value < clamp_min)
         _value = clamp_min;
   }
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   // if all texCoords have the same value
   if ( _min == _max ){

      if ( ! repeat )
        _value = 0.0;
      else
        _value = max_val;

     return;
   }

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   // if the texture should not be repeated, scale to 0..1
   if ( ! repeat ) {
      if (! center ) {
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        if ( scale) {
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          _value /= scaleFactor; //scaleFactor is != 0.0 (otherwise _min==_max)
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          _value -= _min/scaleFactor;
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        }
      } else {
         // the values above zero are mapped to 0.5..1 the negative ones to 0.5..0
         if (_value > 0.0) {
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            _value /= ( _max * 2.0); //_max >= _value > 0.0
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            _value += 0.5;
         } else {
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            if ( _min == 0.0 ){
              _value = 0.0;
            } else {
              _value /= ( _min * 2.0);
              _value = 0.5 - _value;
            }
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         }
      }
   } else {
      _value -= _min;
      _value *= max_val / (_max - _min);
   }
}

void TextureControlPlugin::slotObjectUpdated(int _identifier)
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{
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  // ================================================================================
  // Get updated object
  // ================================================================================
  if ( _identifier == -1 )
    return;
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  BaseObjectData* obj;
  if (! PluginFunctions::getObject(  _identifier , obj ) ) {
    emit log(LOGERR,"slotObjectUpdated: Unable to get Object for id " + QString::number(_identifier) );
    return;
  }

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  //skip object if its not a mesh
  if( !obj->dataType( DATA_TRIANGLE_MESH ) && !obj->dataType( DATA_POLY_MESH ) )
    return;

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  // ================================================================================
  // Get objects texture data and verify that texture exists
  // ================================================================================
  TextureData* texData = dynamic_cast< TextureData* > ( obj->objectData(TEXTUREDATA) );
  if (texData == 0){
    std::cerr << "slotObjectUpdated: Texture data not found!" << std::endl;
    return;
  }

  // ================================================================================
  // Set all textures to dirty
  // ================================================================================
  // TODO : if not in the texture rendering mode, do not emit update
  // Involves adding a interface part to react on draw mode changes
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  // basic check implemented
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  for ( uint i = 0; i < texData->textures().size(); ++i ) {
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    texData->textures()[i].setDirty();
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    bool update = false;
    for ( int j = 0 ; j < PluginFunctions::viewers() ; ++j ) {
       update |= ( PluginFunctions::drawMode(j) == ACG::SceneGraph::DrawModes::SOLID_TEXTURED );
       update |= ( PluginFunctions::drawMode(j) == ACG::SceneGraph::DrawModes::SOLID_TEXTURED_SHADED );
    }

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    if ( update && texData->textures()[i].enabled() )
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      emit updateTexture( texData->textures()[i].name() , _identifier );
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  }
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}

void TextureControlPlugin::slotUpdateAllTextures( ) {
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  std::cerr << "slotUpdateAllTextures: not implemented yet ... might be removed" << std::endl;
  // TODO : Check
//    // Force an update of all textures which are available for the updated object
//    for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::ALL_OBJECTS) ; o_it != PluginFunctions::objectsEnd(); ++o_it)
//       for ( uint i = 0 ; i < textures_.size() ; ++i )
//          emit updateTexture( textures_[i].name , o_it->id() );
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}

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bool TextureControlPlugin::parseMode( QString _mode, Texture& _texture ) {
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  bool changed = false;
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  int i = 0;
  QString nextString = _mode.section(',',i,i);
  while ( nextString != "" ) {
    QString sectionName = nextString.section('=',0,0);
    QString value = nextString.section('=',1,1);

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    // Cleanup representation
    value       = value.trimmed();
    sectionName = sectionName.trimmed();
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    sectionName = sectionName.toLower();
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    if ( sectionName == "clamp" ) {
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      if ( StringToBool(value) != _texture.parameters.clamp ) {
        _texture.parameters.clamp = StringToBool(value);
        changed = true;
      }
    } else if ( sectionName == "clamp_max" ) {
      if (value.toDouble() != _texture.parameters.clamp_max){
        _texture.parameters.clamp_max = value.toDouble();
        changed = true;
      }
    } else if ( sectionName == "clamp_min" ) {
      if (value.toDouble() != _texture.parameters.clamp_min){
        _texture.parameters.clamp_min = value.toDouble();
        changed = true;
      }
    } else if ( sectionName == "max_val" ) {
      if (value.toDouble() != _texture.parameters.max_val){
        _texture.parameters.max_val = value.toDouble();
        changed = true;
      }
    } else if ( sectionName == "repeat" ) {
      if ( StringToBool(value) != _texture.parameters.repeat ) {
        _texture.parameters.repeat = StringToBool(value);
        changed = true;
      }
    } else if ( sectionName == "center" ) {
      if ( StringToBool(value) != _texture.parameters.center ) {
        _texture.parameters.center = StringToBool(value);
        changed = true;
      }
    } else if ( sectionName == "scale" ) {
      if ( StringToBool(value) != _texture.parameters.scale ) {
        _texture.parameters.scale = StringToBool(value);
        changed = true;
      }
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    }else if ( sectionName == "indexproperty" ) {
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      if ( value != _texture.indexMappingProperty() ) {
        _texture.indexMappingProperty( value );
        changed = true;
      }
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    }else if ( sectionName == "visiblename" ) {
      if ( value != _texture.visibleName() ) {
        _texture.visibleName( value );
        changed = true;
      }
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    } else if ( sectionName == "type" ) {
        if ( ( value == "halfedgebased" ) && ( _texture.type() != HALFEDGEBASED ) ) {
          _texture.type( HALFEDGEBASED );
          changed = true;
        } else if ( (value == "vertexbased") && (_texture.type() != HALFEDGEBASED)  ) {
          _texture.type( VERTEXBASED );
          changed = true;
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        }  else if ( (value == "environmentmap") && (_texture.type() != ENVIRONMENT)  ) {
          _texture.type( ENVIRONMENT );
          changed = true;
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        } else {
          emit log(LOGERR,"Unknown texture type : " + value + " for texture: " + _texture.name() );
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        }
    } else
      emit log(LOGERR,"Unknown texture mode : " + sectionName);
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    ++i;
    nextString = _mode.section(',',i,i);
  }
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  return changed;
}

void TextureControlPlugin::slotSetTextureMode(QString _textureName ,QString _mode) {

  // ================================================================================
  // Update texture settings for global textures
  // ================================================================================
  if ( ! globalTextures_.textureExists(_textureName) ) {
    emit log(LOGERR,"Global texture does not exist: " + _textureName);
    return;
  }

  // ================================================================================
  // Parse parameters and update them in the texture data
  // ================================================================================
  Texture& texture = globalTextures_.texture(_textureName);

  // Parse the mode settings
  parseMode(_mode,texture);
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  _mode = _mode.toLower();
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  // ================================================================================
  // Mark updated texture as dirty
  // ================================================================================
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  texture.setDirty();
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  // check if the local textures need to be updated
  for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::ALL_OBJECTS) ; o_it != PluginFunctions::objectsEnd(); ++o_it){

    TextureData* texData = dynamic_cast< TextureData* > ( o_it->objectData(TEXTUREDATA) );
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    if (texData != 0){

      if ( texData->textureExists(_textureName) ){

        Texture& localTex = texData->texture(_textureName);

        //check if something changed
        bool changed = false;

        if ( _mode.contains("clamp") && (texture.parameters.clamp != localTex.parameters.clamp) ){
          localTex.parameters.clamp = texture.parameters.clamp;
          changed = true;
        }

        if ( _mode.contains("clamp_max") && (texture.parameters.clamp_max != localTex.parameters.clamp_max) ){
          localTex.parameters.clamp_max = texture.parameters.clamp_max;
          changed = true;
        }

        if ( _mode.contains("clamp_min") && (texture.parameters.clamp_min != localTex.parameters.clamp_min) ){
          localTex.parameters.clamp_min = texture.parameters.clamp_min;
          changed = true;
        }

        if ( _mode.contains("max_val") && (texture.parameters.max_val != localTex.parameters.max_val) ){
          localTex.parameters.max_val = texture.parameters.max_val;
          changed = true;
        }

        if ( _mode.contains("repeat") && (texture.parameters.repeat != localTex.parameters.repeat) ){
          localTex.parameters.repeat = texture.parameters.repeat;
          changed = true;
        }

        if ( _mode.contains("center") && (texture.parameters.center != localTex.parameters.center) ){
          localTex.parameters.center = texture.parameters.center;
          changed = true;
        }

        if ( _mode.contains("scale") && (texture.parameters.scale != localTex.parameters.scale) ){
          localTex.parameters.scale = texture.parameters.scale;
          changed = true;
        }

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        if ( _mode.contains("type") && (texture.type() != localTex.type() ) ){
          localTex.type( texture.type() );
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          changed = true;
        }

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        if ( _mode.contains("visiblename") && (texture.visibleName() != localTex.visibleName() ) ){
          localTex.visibleName( texture.visibleName() );
          changed = true;
        }

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        //only update if the texture is enabled
        if (changed){
          if ( texData->isEnabled(_textureName) )
            emit updateTexture( _textureName, o_it->id() );
          else
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            localTex.setDirty();
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        }
      }
    }
  }
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}

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bool TextureControlPlugin::StringToBool(QString _value){
  if (_value == "false")
    return false;
  else
    return true;
}

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void TextureControlPlugin::slotSetTextureMode(QString _textureName, QString _mode, int _id) {
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  // Get the new object
  BaseObjectData* obj;
  if (! PluginFunctions::getObject(  _id , obj ) ) {
    emit log(LOGERR,"Unable to get Object for id " + QString::number(_id) );
  }

  // Get Texture data for this object
  TextureData* texData = dynamic_cast< TextureData* > ( obj->objectData(TEXTUREDATA) );

  if ( texData == 0 || ( !texData->textureExists(_textureName))  ) {
    emit log(LOGERR,"Texture does not exist: " + _textureName + " (object=" + QString::number(_id) + ")");
    return;
  }

  // ================================================================================
  // Parse parameters and update them in the texture data
  // ================================================================================
  Texture& texture = texData->texture(_textureName);

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  bool changed = parseMode(_mode,texture);
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  //only update if the texture is enabled
  if (changed){
    if ( texData->isEnabled(_textureName) )
      emit updateTexture( _textureName, _id );
    else
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      texture.setDirty();
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  }
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}

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void TextureControlPlugin::pluginsInitialized() {
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  // ================================================================================
  // Create global texture menu
  // ================================================================================
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  textureMenu_ = new QMenu(tr("&Texture Control"));
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  textureMenu_->setTearOffEnabled(true);
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  emit addMenubarAction(textureMenu_->menuAction(), VIEWMENU );
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  // ================================================================================
  // Create Settings dialog
  // ================================================================================
  // TODO : Settings dialog updates required to change global/local textures,...
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  settingsDialog_ = new texturePropertiesWidget(0);
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  connect( settingsDialog_, SIGNAL( applyProperties(TextureData*,QString,int) ),
           this,              SLOT( applyDialogSettings(TextureData*,QString,int) ));
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  connect( settingsDialog_, SIGNAL( getCoordinates1D(QString,int,std::vector< double >&)),
           this,              SLOT( getCoordinates1D(QString,int,std::vector< double >&)));

  settingsDialog_->installEventFilter( this );

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  // ================================================================================
  // Create action group and menu for global textures
  // ================================================================================
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  actionGroup_ = new QActionGroup( 0 );
  actionGroup_->setExclusive( true );
  connect( actionGroup_, SIGNAL( triggered( QAction * ) ),
          this, SLOT( slotTextureMenu( QAction * ) ) );
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  QAction* AC_Texture_Settings = new QAction(tr("&Texture Settings"), this);
  AC_Texture_Settings->setStatusTip(tr("Set the texture visualization properties"));
  connect(AC_Texture_Settings, SIGNAL(triggered()), this, SLOT(slotSetTextureProperties()));
  textureMenu_->addAction(AC_Texture_Settings);
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  textureMenu_->addSeparator();
  textureMenu_->addActions(actionGroup_->actions());
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  // ================================================================================
  // Create basic per object context menu
  // ================================================================================
  contextMenu_ = new QMenu(0);
  contextMenu_->setTitle("Textures");
  emit addContextMenuItem(contextMenu_->menuAction() ,DATA_TRIANGLE_MESH , CONTEXTOBJECTMENU );
  emit addContextMenuItem(contextMenu_->menuAction() ,DATA_POLY_MESH     , CONTEXTOBJECTMENU );

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  slotTextureAdded("Reflection Lines","reflection_map.png",2);
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  slotSetTextureMode("Reflection Lines","type=environmentmap");
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}
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void TextureControlPlugin::slotSetTextureProperties() {
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  settingsDialog_->show( &globalTextures_, -1);
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}
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void TextureControlPlugin::applyDialogSettings(TextureData* _texData, QString _textureName, int _id) {
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  if (_id != -1){
    //local texture
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    // Get the object
    BaseObjectData* obj;
    if (! PluginFunctions::getObject(  _id , obj ) ) {
      emit log(LOGERR,"Unable to get Object for id " + QString::number(_id) );
    }

    if ( !_texData->textureExists(_textureName) ) {
      emit log(LOGERR,"Texture does not exist in applyDialogSettings " + _textureName );
    }

    Texture& texture = _texData->texture(_textureName );

    if( obj->dataType( DATA_TRIANGLE_MESH ) ){
      PluginFunctions::triMeshObject(obj)->textureNode()->set_texture(texture.textureImage , texture.glName() );
    } else  if ( obj->dataType( DATA_POLY_MESH ) ) {
      PluginFunctions::polyMeshObject(obj)->textureNode()->set_texture(texture.textureImage , texture.glName() );
    }

    // Always mark texture as dirty
    _texData->texture( _textureName ).setDirty();

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    //switch back to the active texture to force rebind
    for ( uint i=0; i < _texData->textures().size(); i++ )
      if ( _texData->textures()[i].enabled() ){
        doSwitchTexture( _texData->textures()[i].name(), _id);
        break;
      }

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    emit updateView();
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  } else {
    // global texture

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    _texData->texture( _textureName ).setDirty();
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    Texture& globalTexture = _texData->texture(_textureName);

    // check if the local textures need to be updated
    for ( PluginFunctions::ObjectIterator o_it(PluginFunctions::ALL_OBJECTS) ; o_it != PluginFunctions::objectsEnd(); ++o_it){

      TextureData* texData = dynamic_cast< TextureData* > ( o_it->objectData(TEXTUREDATA) );
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