source: trunk/packages/vizservers/nanovis/PlaneRenderer.h @ 2618

/*
 * ----------------------------------------------------------------------
 * 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