text: ////////////////////////////////////////////////////////////////////////////
  //
  //  This file is part of RTIMULib
  //
  //  Copyright (c) 2014, richards-tech
  //
  //  Permission is hereby granted, free of charge, to any person obtaining a copy of
  //  this software and associated documentation files (the "Software"), to deal in
  //  the Software without restriction, including without limitation the rights to use,
  //  copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the
  //  Software, and to permit persons to whom the Software is furnished to do so,
  //  subject to the following conditions:
  //
  //  The above copyright notice and this permission notice shall be included in all
  //  copies or substantial portions of the Software.
  //
  //  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
  //  INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
  //  PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
  //  HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  //  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  //  SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  
  //	Based on code from the OpenGL SuperBible:
  
  /*
   *  OpenGL SuperBible
   *
  Copyright (c) 2007-2009, Richard S. Wright Jr.
  All rights reserved.
  
  Redistribution and use in source and binary forms, with or without modification,
  are permitted provided that the following conditions are met:
  
  Redistributions of source code must retain the above copyright notice, this list
  of conditions and the following disclaimer.
  
  Redistributions in binary form must reproduce the above copyright notice, this list
  of conditions and the following disclaimer in the documentation and/or other
  materials provided with the distribution.
  
  Neither the name of Richard S. Wright Jr. nor the names of other contributors may be used
  to endorse or promote products derived from this software without specific prior
  written permission.
  
  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY
  EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
  SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
  TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */
  
  #ifndef QTGLCOMPONENT_H
  #define QTGLCOMPONENT_H
  
  class QtGLComponent
  {
  public:
      QtGLComponent();
      ~QtGLComponent();
  
      virtual void setShader(QtGLShader *shader);
      virtual void setTexture(GLuint texture);
      virtual void setTexture(const QImage& image);
      virtual void setMaterial(const COMPONENT_MATERIAL& material);
      virtual void setMaterial(const QVector3D& ambient, const QVector3D& diffuse, const QVector3D& specular,
              float shininess);
      virtual void draw(GLenum drawMode);
  
      virtual void setColor(const QColor& color);             // sets color for flat shader
  
      inline QVector3D& getBoundMinus() { return m_boundMinus; };
      inline QVector3D& getBoundPlus() { return m_boundPlus; };
  
  protected:
      void reset();                                           // clears everything and starts again
      int nearestPOT(int val);                                // returns nearest power of 2
      void addTriangle(QVector3D *verts, QVector3D *norms, QVector2D *texCoords); // adds a triangle
      void addVertex(const QVector3D& vertex);                // adds a vertex to the component
      void addNormal(const QVector3D& normal);                // adds a normal to the component
      void addTextureCoord(const QVector2D& textureCoord);    // adds a texture coord to the component
      void addIndex(GLushort index);                          // adds an index to the component
      void useIndexBuffer(bool use);                          // says that index buffer is to be used in draw
      void useNormalBuffer(bool use);                         // says that normal buffer is to be used in draw
  
  
      void updateBoundingBox(const QVector3D& vert);          // update the component bounding box
  
  private:
      QtGLShader *m_shader;
      int m_texture;
      QColor m_color;
      COMPONENT_MATERIAL m_material;
  
      QVector <QVector3D> m_vertices;
      QVector <QVector3D> m_normals;
      QVector <QVector2D> m_textureCoords;
      QVector <GLushort> m_indices;
  
      QGLBuffer *m_indexBuffer;
      QGLBuffer *m_normalBuffer;
  
      bool m_useIndexBuffer;
      bool m_useNormalBuffer;
  
      QVector3D m_boundMinus;                                 // lowest in each coord for box
      QVector3D m_boundPlus;                                  // highest in each coord for box
  
  
  };
  
  #endif // QTGLCOMPONENT_H
  