1 | /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ |
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2 | /* |
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3 | * ---------------------------------------------------------------------- |
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4 | * VolumeRenderer.h : VolumeRenderer class for volume visualization |
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5 | * |
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6 | * ====================================================================== |
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7 | * AUTHOR: Wei Qiao <qiaow@purdue.edu> |
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8 | * Purdue Rendering and Perceptualization Lab (PURPL) |
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9 | * |
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10 | * Copyright (c) 2004-2006 Purdue Research Foundation |
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11 | * |
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12 | * See the file "license.terms" for information on usage and |
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13 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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14 | * ====================================================================== |
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15 | */ |
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16 | #ifndef _VOLUME_RENDERER_H_ |
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17 | #define _VOLUME_RENDERER_H_ |
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18 | |
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19 | #include <GL/glew.h> |
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20 | |
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21 | #include "Mat4x4.h" |
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22 | #include "Volume.h" |
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23 | #include "VolumeInterpolator.h" |
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24 | #include "NvRegularVolumeShader.h" |
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25 | #include "NvZincBlendeVolumeShader.h" |
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26 | #include "NvStdVertexShader.h" |
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27 | |
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28 | class VolumeRenderer |
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29 | { |
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30 | public: |
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31 | VolumeRenderer(); |
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32 | |
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33 | ~VolumeRenderer(); |
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34 | |
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35 | /// render all enabled volumes |
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36 | void renderAll(); |
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37 | |
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38 | void specular(float val); |
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39 | |
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40 | void diffuse(float val); |
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41 | |
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42 | /// control independently |
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43 | void setSliceMode(bool val) |
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44 | { |
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45 | _sliceMode = val; |
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46 | } |
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47 | |
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48 | void setVolumeMode(bool val) |
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49 | { |
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50 | _volumeMode = val; |
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51 | } |
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52 | |
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53 | /// switch_cutplane_mode |
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54 | void switchSliceMode() |
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55 | { |
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56 | _sliceMode = (!_sliceMode); |
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57 | } |
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58 | |
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59 | void switchVolumeMode() |
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60 | { |
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61 | _volumeMode = (!_volumeMode); |
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62 | } |
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63 | |
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64 | void clearAnimatedVolumeInfo() |
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65 | { |
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66 | _volumeInterpolator->clearAll(); |
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67 | } |
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68 | |
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69 | void addAnimatedVolume(Volume* volume) |
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70 | { |
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71 | _volumeInterpolator->addVolume(volume); |
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72 | } |
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73 | |
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74 | void startVolumeAnimation() |
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75 | { |
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76 | _volumeInterpolator->start(); |
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77 | } |
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78 | |
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79 | void stopVolumeAnimation() |
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80 | { |
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81 | _volumeInterpolator->stop(); |
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82 | } |
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83 | |
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84 | VolumeInterpolator* getVolumeInterpolator() |
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85 | { |
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86 | return _volumeInterpolator; |
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87 | } |
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88 | |
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89 | friend class NanoVis; |
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90 | |
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91 | private: |
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92 | void initShaders(); |
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93 | |
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94 | void activateVolumeShader(Volume *vol, bool slice_mode); |
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95 | |
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96 | void deactivateVolumeShader(); |
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97 | |
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98 | void drawBoundingBox(float x0, float y0, float z0, |
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99 | float x1, float y1, float z1, |
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100 | float r, float g, float b, float line_width); |
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101 | |
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102 | void getNearFarZ(const Mat4x4& mv, double& zNear, double& zFar); |
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103 | |
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104 | bool initFont(const char *filename); |
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105 | |
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106 | /// there are two sets of font in the texture. 0, 1 |
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107 | void glPrint(char *string, int set); |
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108 | |
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109 | /// draw label using bitmap texture |
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110 | void drawLabel(Volume *vol); |
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111 | |
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112 | /// Register the location of each alphabet in |
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113 | void buildFont(); |
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114 | |
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115 | VolumeInterpolator *_volumeInterpolator; |
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116 | |
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117 | bool _sliceMode; ///< enable cut planes |
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118 | bool _volumeMode; ///< enable full volume rendering |
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119 | |
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120 | /** |
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121 | * shader parameters for rendering a single cubic volume |
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122 | */ |
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123 | NvRegularVolumeShader *_regularVolumeShader; |
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124 | |
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125 | /** |
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126 | * Shader parameters for rendering a single zincblende orbital. A |
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127 | * simulation contains S, P, D and SS, total of 4 orbitals. A full |
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128 | * rendering requires 4 zincblende orbital volumes. A zincblende orbital |
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129 | * volume is decomposed into two "interlocking" cubic volumes and passed |
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130 | * to the shader. We render each orbital with its own independent |
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131 | * transfer functions then blend the result. |
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132 | * |
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133 | * The engine is already capable of rendering multiple volumes and combine |
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134 | * them. Thus, we just invoke this shader on S, P, D and SS orbitals with |
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135 | * different transfor functions. The result is a multi-orbital rendering. |
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136 | * This is equivalent to rendering 4 unrelated data sets occupying the |
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137 | * same space. |
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138 | */ |
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139 | NvZincBlendeVolumeShader *_zincBlendeShader; |
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140 | |
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141 | /** |
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142 | * standard vertex shader |
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143 | */ |
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144 | NvStdVertexShader *_stdVertexShader; |
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145 | |
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146 | GLuint _fontBase; ///< The base of the font display list. |
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147 | GLuint _fontTexture; ///< The id of the font texture |
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148 | }; |
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149 | |
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150 | #endif |
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