| 1 | /*
|
|---|
| 2 | * ----------------------------------------------------------------------
|
|---|
| 3 | * VolumeRenderer.h : VolumeRenderer class for volume visualization
|
|---|
| 4 | *
|
|---|
| 5 | * ======================================================================
|
|---|
| 6 | * AUTHOR: Wei Qiao <qiaow@purdue.edu>
|
|---|
| 7 | * Purdue Rendering and Perceptualization Lab (PURPL)
|
|---|
| 8 | *
|
|---|
| 9 | * Copyright (c) 2004-2006 Purdue Research Foundation
|
|---|
| 10 | *
|
|---|
| 11 | * See the file "license.terms" for information on usage and
|
|---|
| 12 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
|
|---|
| 13 | * ======================================================================
|
|---|
| 14 | */
|
|---|
| 15 |
|
|---|
| 16 | #ifndef _VOLUME_RENDERER_H_
|
|---|
| 17 | #define _VOLUME_RENDERER_H_
|
|---|
| 18 |
|
|---|
| 19 | #include <GL/glew.h>
|
|---|
| 20 | #include <Cg/cgGL.h>
|
|---|
| 21 | #include <math.h>
|
|---|
| 22 | #include <stdio.h>
|
|---|
| 23 | #include <assert.h>
|
|---|
| 24 | #include <float.h>
|
|---|
| 25 | #include <vector>
|
|---|
| 26 |
|
|---|
| 27 | #include "define.h"
|
|---|
| 28 | #include "global.h"
|
|---|
| 29 | #include "Camera.h"
|
|---|
| 30 | #include "ConvexPolygon.h"
|
|---|
| 31 | #include "TransferFunction.h"
|
|---|
| 32 | #include "Mat4x4.h"
|
|---|
| 33 | #include "Volume.h"
|
|---|
| 34 | #include "PerfQuery.h"
|
|---|
| 35 |
|
|---|
| 36 | using namespace std;
|
|---|
| 37 |
|
|---|
| 38 | class VolumeRenderer{
|
|---|
| 39 |
|
|---|
| 40 | private:
|
|---|
| 41 | Camera* cam;
|
|---|
| 42 | vector <Volume*> volume; //array of volumes
|
|---|
| 43 | vector <TransferFunction*> tf;//array of corresponding transfer functions
|
|---|
| 44 | vector <int> slice; //array of corresponding number of slices
|
|---|
| 45 | vector <bool> render_bit; //bits marking which volume(s) to render
|
|---|
| 46 | int n_volumes;
|
|---|
| 47 |
|
|---|
| 48 | //shading parameters
|
|---|
| 49 | float live_diffuse;
|
|---|
| 50 | float live_specular;
|
|---|
| 51 |
|
|---|
| 52 | //cg related
|
|---|
| 53 | CGcontext g_context; //the Nvidia cg context
|
|---|
| 54 | CGprogram m_one_volume_fprog;
|
|---|
| 55 | CGparameter m_vol_one_volume_param;
|
|---|
| 56 | CGparameter m_tf_one_volume_param;
|
|---|
| 57 | CGparameter m_mvi_one_volume_param;
|
|---|
| 58 | CGparameter m_mv_one_volume_param;
|
|---|
| 59 | CGparameter m_render_param_one_volume_param;
|
|---|
| 60 |
|
|---|
| 61 | CGprogram m_vert_std_vprog;
|
|---|
| 62 | CGparameter m_mvp_vert_std_param;
|
|---|
| 63 | CGparameter m_mvi_vert_std_param;
|
|---|
| 64 |
|
|---|
| 65 | void activate_one_volume_shader(int volume_index, int n_actual_slices, float opacity_scale);
|
|---|
| 66 | void deactivate_one_volume_shader();
|
|---|
| 67 |
|
|---|
| 68 | //draw bounding box
|
|---|
| 69 | void draw_bounding_box(float x0, float y0, float z0,
|
|---|
| 70 | float x1, float y1, float z1,
|
|---|
| 71 | float r, float g, float b, float line_width);
|
|---|
| 72 |
|
|---|
| 73 | void get_near_far_z(Mat4x4 mv, double &zNear, double &zFar);
|
|---|
| 74 |
|
|---|
| 75 | public:
|
|---|
| 76 | VolumeRenderer();
|
|---|
| 77 | VolumeRenderer(Camera* cam, Volume* _vol, TransferFunction* _tf, CGcontext _context);
|
|---|
| 78 | ~VolumeRenderer();
|
|---|
| 79 |
|
|---|
| 80 | void add_volume(Volume* _vol, TransferFunction* _tf, int _slice);
|
|---|
| 81 | //add a volume and its transfer function
|
|---|
| 82 | //we require a transfer function when a
|
|---|
| 83 | //volume is added.
|
|---|
| 84 | void render(int volume_index);
|
|---|
| 85 | void set_specular(float val);
|
|---|
| 86 | void set_diffuse(float val);
|
|---|
| 87 | };
|
|---|
| 88 |
|
|---|
| 89 | #endif
|
|---|
