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 | * Volume.h: 3d volume class |
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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) 2004-2013 HUBzero Foundation, LLC |
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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_H |
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17 | #define VOLUME_H |
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18 | |
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19 | #include <cstring> |
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20 | #include <string> |
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21 | #include <vector> |
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22 | |
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23 | #include <vrmath/Vector3f.h> |
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24 | |
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25 | #include "Texture3D.h" |
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26 | #include "AxisRange.h" |
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27 | #include "TransferFunction.h" |
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28 | |
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29 | struct CutPlane { |
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30 | /// orientation - 1: xy slice, 2: yz slice, 3: xz slice |
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31 | int orient; |
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32 | float offset; ///< normalized offset [0,1] in the volume |
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33 | bool enabled; |
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34 | |
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35 | CutPlane(int _orient, float _offset) : |
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36 | orient(_orient), |
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37 | offset(_offset), |
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38 | enabled(true) |
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39 | { |
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40 | } |
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41 | }; |
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42 | |
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43 | class VolumeInterpolator; |
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44 | |
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45 | class Volume |
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46 | { |
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47 | public: |
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48 | enum VolumeType { |
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49 | CUBIC, |
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50 | VOLQD, |
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51 | ZINCBLENDE |
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52 | }; |
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53 | |
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54 | /** |
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55 | * \brief Volume data constructor |
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56 | * |
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57 | * Represents a 3D regular grid with uniform spacing along |
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58 | * each axis. Sample spacing may differ between X, Y and Z |
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59 | * |
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60 | * \param x X location |
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61 | * \param y Y location |
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62 | * \param z Z location |
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63 | * \param width Number of samples in X |
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64 | * \param height Number of samples in Y |
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65 | * \param depth Number of samples in Z |
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66 | * \param numComponents Number of components per sample |
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67 | * \param data width * height * depth * numComponent sample array |
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68 | * \param vmin Scalar value minimum |
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69 | * \param vmax Scalar value maximum |
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70 | * \param nonZeroMin Scalar minimum which is greater than zero |
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71 | */ |
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72 | Volume(float x, float y, float z, |
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73 | int width, int height, int depth, |
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74 | int numComponents, |
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75 | float *data, |
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76 | double vmin, double vmax, |
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77 | double nonZeroMin); |
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78 | |
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79 | virtual ~Volume(); |
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80 | |
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81 | int width() const |
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82 | { |
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83 | return _width; |
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84 | } |
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85 | |
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86 | int height() const |
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87 | { |
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88 | return _height; |
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89 | } |
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90 | |
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91 | int depth() const |
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92 | { |
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93 | return _depth; |
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94 | } |
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95 | |
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96 | void visible(bool value) |
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97 | { |
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98 | _enabled = value; |
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99 | } |
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100 | |
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101 | bool visible() const |
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102 | { |
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103 | return _enabled; |
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104 | } |
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105 | |
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106 | void location(const vrmath::Vector3f& loc) |
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107 | { |
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108 | _location = loc; |
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109 | } |
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110 | |
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111 | vrmath::Vector3f location() const |
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112 | { |
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113 | return _location; |
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114 | } |
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115 | |
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116 | int isosurface() const |
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117 | { |
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118 | return _isosurface; |
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119 | } |
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120 | |
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121 | void isosurface(int iso) |
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122 | { |
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123 | _isosurface = iso; |
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124 | } |
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125 | |
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126 | int numComponents() const |
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127 | { |
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128 | return _numComponents; |
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129 | } |
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130 | |
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131 | double nonZeroMin() const |
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132 | { |
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133 | return _nonZeroMin; |
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134 | } |
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135 | |
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136 | int volumeType() const |
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137 | { |
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138 | return _volumeType; |
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139 | } |
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140 | |
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141 | const float *data() const |
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142 | { |
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143 | return _data; |
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144 | } |
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145 | |
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146 | const Texture3D *tex() const |
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147 | { |
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148 | return _tex; |
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149 | } |
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150 | |
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151 | int numSlices() const |
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152 | { |
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153 | return _numSlices; |
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154 | } |
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155 | |
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156 | void numSlices(int n) |
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157 | { |
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158 | _numSlices = n; |
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159 | } |
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160 | |
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161 | // methods related to cutplanes |
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162 | /// add a plane and returns its index |
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163 | int addCutplane(int orientation, float location); |
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164 | |
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165 | void enableCutplane(int index); |
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166 | |
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167 | void disableCutplane(int index); |
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168 | |
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169 | void moveCutplane(int index, float location); |
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170 | |
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171 | CutPlane *getCutplane(int index); |
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172 | |
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173 | /// returns the number of cutplanes in the volume |
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174 | int getCutplaneCount(); |
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175 | |
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176 | /// check if a cutplane is enabled |
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177 | bool isCutplaneEnabled(int index) const; |
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178 | |
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179 | // methods related to shading. These parameters are per volume |
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180 | |
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181 | /// Get ambient coefficient |
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182 | float ambient() const |
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183 | { |
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184 | return _ambient; |
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185 | } |
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186 | |
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187 | /// Set ambient coefficient [0,1] |
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188 | void ambient(float value) |
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189 | { |
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190 | if (value < 0.0f) value = 0.0f; |
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191 | if (value > 1.0f) value = 1.0f; |
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192 | _ambient = value; |
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193 | } |
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194 | |
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195 | /// Get diffuse coefficient |
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196 | float diffuse() const |
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197 | { |
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198 | return _diffuse; |
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199 | } |
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200 | |
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201 | /// Set diffuse coefficient [0,1] |
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202 | void diffuse(float value) |
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203 | { |
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204 | if (value < 0.0f) value = 0.0f; |
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205 | if (value > 1.0f) value = 1.0f; |
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206 | _diffuse = value; |
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207 | } |
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208 | |
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209 | /// Get specular coefficient |
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210 | float specularLevel() const |
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211 | { |
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212 | return _specular; |
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213 | } |
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214 | |
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215 | /// Set specular coefficient [0,1] |
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216 | void specularLevel(float value) |
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217 | { |
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218 | if (value < 0.0f) value = 0.0f; |
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219 | if (value > 1.0f) value = 1.0f; |
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220 | _specular = value; |
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221 | } |
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222 | |
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223 | /// Get specular exponent |
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224 | float specularExponent() const |
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225 | { |
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226 | return _specularExp; |
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227 | } |
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228 | |
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229 | /// Set specular exponent [0,128] |
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230 | void specularExponent(float value) |
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231 | { |
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232 | if (value < 0.0f) value = 0.0f; |
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233 | if (value > 128.0f) value = 128.0f; |
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234 | _specularExp = value; |
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235 | } |
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236 | |
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237 | bool twoSidedLighting() const |
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238 | { |
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239 | return _lightTwoSide; |
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240 | } |
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241 | |
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242 | void twoSidedLighting(bool value) |
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243 | { |
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244 | _lightTwoSide = value; |
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245 | } |
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246 | |
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247 | float opacityScale() const |
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248 | { |
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249 | return _opacityScale; |
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250 | } |
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251 | |
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252 | void opacityScale(float value) |
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253 | { |
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254 | _opacityScale = value; |
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255 | } |
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256 | |
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257 | void dataEnabled(bool value) |
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258 | { |
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259 | _dataEnabled = value; |
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260 | } |
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261 | |
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262 | bool dataEnabled() const |
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263 | { |
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264 | return _dataEnabled; |
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265 | } |
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266 | |
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267 | void outline(bool value) |
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268 | { |
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269 | _outlineEnabled = value; |
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270 | } |
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271 | |
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272 | bool outline() |
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273 | { |
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274 | return _outlineEnabled; |
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275 | } |
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276 | |
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277 | TransferFunction *transferFunction() |
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278 | { |
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279 | return _tfPtr; |
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280 | } |
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281 | |
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282 | void transferFunction(TransferFunction *tfPtr) |
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283 | { |
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284 | _tfPtr = tfPtr; |
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285 | } |
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286 | |
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287 | void setOutlineColor(float *rgb); |
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288 | |
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289 | void getOutlineColor(float *rgb); |
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290 | |
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291 | vrmath::Vector3f getPhysicalScaling() const |
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292 | { |
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293 | vrmath::Vector3f scale; |
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294 | scale.x = 1; |
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295 | scale.y = yAxis.length() / xAxis.length(); |
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296 | scale.z = zAxis.length() / xAxis.length(); |
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297 | return scale; |
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298 | } |
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299 | |
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300 | void getWorldSpaceBounds(vrmath::Vector3f& bboxMin, |
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301 | vrmath::Vector3f& bboxMax) const; |
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302 | |
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303 | double sampleDistanceX() const |
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304 | { |
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305 | return (xAxis.length() / ((double)_width-1.0)); |
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306 | } |
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307 | |
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308 | double sampleDistanceY() const |
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309 | { |
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310 | return (yAxis.length() / ((double)_height-1.0)); |
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311 | } |
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312 | |
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313 | double sampleDistanceZ() const |
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314 | { |
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315 | if (_depth == 1) |
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316 | return sampleDistanceX(); |
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317 | return (zAxis.length() / ((double)_depth-1.0)); |
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318 | } |
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319 | |
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320 | const char *name() const |
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321 | { |
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322 | return _name; |
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323 | } |
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324 | |
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325 | void name(const char *name) |
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326 | { |
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327 | _name = name; |
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328 | } |
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329 | |
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330 | GLuint textureID() const |
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331 | { |
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332 | return _id; |
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333 | } |
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334 | |
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335 | AxisRange xAxis, yAxis, zAxis, wAxis; |
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336 | |
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337 | static bool updatePending; |
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338 | static double valueMin, valueMax; |
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339 | |
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340 | friend class VolumeInterpolator; |
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341 | |
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342 | protected: |
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343 | float *data() |
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344 | { |
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345 | return _data; |
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346 | } |
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347 | |
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348 | Texture3D *tex() |
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349 | { |
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350 | return _tex; |
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351 | } |
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352 | |
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353 | GLuint _id; ///< OpenGL textue identifier (==_tex->id) |
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354 | |
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355 | // Width, height and depth are point resolution, NOT physical |
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356 | // units |
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357 | /// The resolution of the data (how many points in X direction) |
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358 | int _width; |
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359 | /// The resolution of the data (how many points in Y direction) |
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360 | int _height; |
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361 | /// The resolution of the data (how many points in Z direction) |
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362 | int _depth; |
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363 | |
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364 | /** |
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365 | * This is the designated transfer function to use to |
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366 | * render this volume. |
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367 | */ |
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368 | TransferFunction *_tfPtr; |
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369 | |
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370 | float _ambient; ///< Ambient material coefficient |
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371 | float _diffuse; ///< Diffuse material coefficient |
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372 | float _specular; ///< Specular level material coefficient |
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373 | float _specularExp; ///< Specular exponent |
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374 | bool _lightTwoSide; ///< Two-sided lighting flag |
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375 | |
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376 | /** |
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377 | * The scale multiplied to the opacity assigned by the |
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378 | * transfer function. Rule of thumb: higher opacity_scale |
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379 | * the object is to appear like plastic |
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380 | */ |
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381 | float _opacityScale; |
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382 | |
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383 | const char *_name; |
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384 | float *_data; |
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385 | |
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386 | int _numComponents; |
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387 | |
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388 | double _nonZeroMin; |
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389 | |
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390 | std::vector<CutPlane> _plane; ///< cut planes |
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391 | |
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392 | Texture3D *_tex; ///< OpenGL texture storing the volume |
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393 | |
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394 | vrmath::Vector3f _location; |
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395 | |
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396 | /** |
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397 | * Number of slices when rendered. The greater |
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398 | * the better quality, lower speed. |
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399 | */ |
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400 | int _numSlices; |
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401 | bool _enabled; |
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402 | bool _dataEnabled; ///< show/hide cloud of volume data |
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403 | bool _outlineEnabled; ///< show/hide outline around volume |
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404 | float _outlineColor[3]; ///< color for outline around volume |
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405 | int _volumeType; ///< cubic or zincblende |
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406 | int _isosurface; |
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407 | }; |
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408 | |
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409 | inline int |
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410 | Volume::addCutplane(int orientation, float location) |
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411 | { |
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412 | _plane.push_back(CutPlane(orientation, location)); |
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413 | return _plane.size() - 1; |
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414 | } |
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415 | |
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416 | inline void |
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417 | Volume::enableCutplane(int index) |
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418 | { |
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419 | //assert(index < plane.size()); |
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420 | _plane[index].enabled = true; |
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421 | } |
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422 | |
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423 | inline void |
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424 | Volume::disableCutplane(int index) |
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425 | { |
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426 | //assert(index < plane.size()); |
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427 | _plane[index].enabled = false; |
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428 | } |
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429 | |
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430 | inline void |
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431 | Volume::moveCutplane(int index, float location) |
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432 | { |
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433 | //assert(index < plane.size()); |
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434 | _plane[index].offset = location; |
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435 | } |
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436 | |
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437 | inline CutPlane * |
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438 | Volume::getCutplane(int index) |
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439 | { |
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440 | //assert(index < plane.size()); |
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441 | return &_plane[index]; |
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442 | } |
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443 | |
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444 | inline int |
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445 | Volume::getCutplaneCount() |
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446 | { |
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447 | return _plane.size(); |
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448 | } |
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449 | |
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450 | inline bool |
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451 | Volume::isCutplaneEnabled(int index) const |
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452 | { |
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453 | //assert(index < plane.size()); |
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454 | return _plane[index].enabled; |
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455 | } |
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456 | |
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457 | inline void |
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458 | Volume::setOutlineColor(float *rgb) |
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459 | { |
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460 | memcpy(_outlineColor, rgb, sizeof(float)*3); |
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461 | } |
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462 | |
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463 | inline void |
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464 | Volume::getOutlineColor(float *rgb) |
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465 | { |
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466 | memcpy(rgb, _outlineColor, sizeof(float)*3); |
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467 | } |
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468 | |
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469 | #endif |
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