source: trunk/vizservers/nanovis/PlaneRenderer.h @ 829

/*
 * ----------------------------------------------------------------------
 * PlaneRenderer.h : PlaneRenderer class for 2D visualization
 *
 * ======================================================================
 *  AUTHOR:  Wei Qiao <qiaow@purdue.edu>
 *           Purdue Rendering and Perceptualization Lab (PURPL)
 *
 *  Copyright (c) 2004-2006  Purdue Research Foundation
 *
 *  See the file "license.terms" for information on usage and
 *  redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 * ======================================================================
 */

#ifndef _PLANE_RENDERER_H_
#define _PLANE_RENDERER_H_

#include <GL/glew.h>
#include <Cg/cgGL.h>
#include <GL/glut.h>
#include <math.h>
#include <stdio.h>
#include <assert.h>
#include <float.h>
#include <vector>

#include "define.h"
#include "global.h"
#include "TransferFunction.h"
#include "Texture2D.h"

using namespace std;

class PlaneRenderer{

private:
  vector <Texture2D*> plane;     //array of volumes
  vector <TransferFunction*> tf; //array of corresponding transfer functions 
  int active_plane;              //the active plane, only one is rendered
  int n_planes;

  int render_width;     //render size
  int render_height;    

  //cg related
  CGcontext g_context;          //the Nvidia cg context 
  CGprogram m_fprog;
  CGparameter m_data_param;
  CGparameter m_tf_param;
  CGparameter m_render_param;

  void init_shaders();
  void activate_shader(int plane_index);
  void deactivate_shader();

public:
  PlaneRenderer(CGcontext _context, int width, int height);
  ~PlaneRenderer();

  int add_plane(Texture2D* _p, TransferFunction* _tf);
                                                //add a plane and its transfer function
                                                //we require a transfer function when a 
                                                //plane is added.
  void remove_plane(int index);
  void set_active_plane(int index);             //set the active plane to be rendered
  void set_screen_size(int w, int h);           //change the rendering size
  void render();
};

#endif