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 | * Nanovis: Visualization of Nanoelectronics Data |
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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 | * Michael McLennan <mmclennan@purdue.edu> |
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9 | * Purdue Rendering and Perceptualization Lab (PURPL) |
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10 | * |
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11 | * Copyright (c) 2004-2013 HUBzero Foundation, LLC |
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12 | * |
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13 | * See the file "license.terms" for information on usage and |
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14 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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15 | * ====================================================================== |
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16 | */ |
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17 | |
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18 | #include <sys/time.h> |
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19 | #include <cassert> |
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20 | #include <cstdio> |
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21 | |
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22 | #include <GL/glew.h> |
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23 | #include <GL/glut.h> |
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24 | |
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25 | #include <graphics/RenderContext.h> |
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26 | #include <vrmath/BBox.h> |
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27 | #include <vrmath/Vector3f.h> |
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28 | |
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29 | #include <util/FilePath.h> |
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30 | #include <util/Fonts.h> |
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31 | |
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32 | #include <BMPImageLoaderImpl.h> |
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33 | #include <ImageLoaderFactory.h> |
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34 | |
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35 | #include "config.h" |
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36 | #include "nanovis.h" |
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37 | #include "nanovisServer.h" |
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38 | #include "define.h" |
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39 | |
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40 | #include "Flow.h" |
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41 | #include "Grid.h" |
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42 | #include "HeightMap.h" |
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43 | #include "Camera.h" |
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44 | #include "LIC.h" |
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45 | #include "Shader.h" |
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46 | #include "OrientationIndicator.h" |
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47 | #include "PlaneRenderer.h" |
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48 | #include "PPMWriter.h" |
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49 | #include "Texture2D.h" |
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50 | #include "Trace.h" |
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51 | #include "TransferFunction.h" |
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52 | #include "Unirect.h" |
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53 | #include "VelocityArrowsSlice.h" |
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54 | #include "Volume.h" |
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55 | #include "VolumeInterpolator.h" |
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56 | #include "VolumeRenderer.h" |
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57 | |
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58 | using namespace nv; |
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59 | using namespace nv::graphics; |
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60 | using namespace nv::util; |
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61 | using namespace vrmath; |
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62 | |
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63 | // STATIC MEMBER DATA |
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64 | |
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65 | Tcl_Interp *NanoVis::interp = NULL; |
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66 | |
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67 | bool NanoVis::redrawPending = false; |
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68 | bool NanoVis::debugFlag = false; |
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69 | |
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70 | int NanoVis::winWidth = NPIX; |
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71 | int NanoVis::winHeight = NPIX; |
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72 | int NanoVis::renderWindow = 0; |
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73 | unsigned char *NanoVis::screenBuffer = NULL; |
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74 | Texture2D *NanoVis::legendTexture = NULL; |
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75 | Fonts *NanoVis::fonts; |
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76 | Camera *NanoVis::_camera = NULL; |
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77 | RenderContext *NanoVis::renderContext = NULL; |
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78 | |
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79 | NanoVis::TransferFunctionHashmap NanoVis::tfTable; |
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80 | NanoVis::VolumeHashmap NanoVis::volumeTable; |
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81 | NanoVis::FlowHashmap NanoVis::flowTable; |
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82 | NanoVis::HeightMapHashmap NanoVis::heightMapTable; |
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83 | |
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84 | BBox NanoVis::sceneBounds; |
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85 | |
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86 | VolumeRenderer *NanoVis::volRenderer = NULL; |
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87 | VelocityArrowsSlice *NanoVis::velocityArrowsSlice = NULL; |
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88 | LIC *NanoVis::licRenderer = NULL; |
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89 | PlaneRenderer *NanoVis::planeRenderer = NULL; |
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90 | OrientationIndicator *NanoVis::orientationIndicator = NULL; |
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91 | Grid *NanoVis::grid = NULL; |
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92 | |
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93 | //frame buffer for final rendering |
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94 | GLuint NanoVis::_finalFbo = 0; |
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95 | GLuint NanoVis::_finalColorTex = 0; |
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96 | GLuint NanoVis::_finalDepthRb = 0; |
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97 | |
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98 | void |
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99 | NanoVis::removeAllData() |
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100 | { |
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101 | TRACE("Enter"); |
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102 | |
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103 | if (grid != NULL) { |
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104 | TRACE("Deleting grid"); |
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105 | delete grid; |
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106 | } |
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107 | if (_camera != NULL) { |
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108 | TRACE("Deleting camera"); |
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109 | delete _camera; |
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110 | } |
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111 | if (volRenderer != NULL) { |
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112 | TRACE("Deleting volRenderer"); |
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113 | delete volRenderer; |
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114 | } |
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115 | if (planeRenderer != NULL) { |
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116 | TRACE("Deleting planeRenderer"); |
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117 | delete planeRenderer; |
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118 | } |
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119 | if (legendTexture != NULL) { |
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120 | TRACE("Deleting legendTexture"); |
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121 | delete legendTexture; |
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122 | } |
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123 | TRACE("Deleting flows"); |
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124 | deleteFlows(interp); |
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125 | if (licRenderer != NULL) { |
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126 | TRACE("Deleting licRenderer"); |
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127 | delete licRenderer; |
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128 | } |
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129 | if (velocityArrowsSlice != NULL) { |
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130 | TRACE("Deleting velocityArrowsSlice"); |
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131 | delete velocityArrowsSlice; |
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132 | } |
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133 | if (renderContext != NULL) { |
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134 | TRACE("Deleting renderContext"); |
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135 | delete renderContext; |
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136 | } |
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137 | if (screenBuffer != NULL) { |
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138 | TRACE("Deleting screenBuffer"); |
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139 | delete [] screenBuffer; |
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140 | screenBuffer = NULL; |
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141 | } |
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142 | if (fonts != NULL) { |
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143 | TRACE("Deleting fonts"); |
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144 | delete fonts; |
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145 | } |
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146 | TRACE("Leave"); |
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147 | } |
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148 | |
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149 | void |
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150 | NanoVis::eventuallyRedraw() |
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151 | { |
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152 | if (!redrawPending) { |
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153 | glutPostRedisplay(); |
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154 | redrawPending = true; |
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155 | } |
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156 | } |
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157 | |
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158 | void |
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159 | NanoVis::panCamera(float dx, float dy) |
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160 | { |
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161 | _camera->pan(dx, dy); |
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162 | |
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163 | collectBounds(); |
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164 | _camera->resetClippingRange(sceneBounds.min, sceneBounds.max); |
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165 | } |
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166 | |
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167 | void |
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168 | NanoVis::zoomCamera(float z) |
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169 | { |
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170 | _camera->zoom(z); |
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171 | |
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172 | collectBounds(); |
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173 | _camera->resetClippingRange(sceneBounds.min, sceneBounds.max); |
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174 | } |
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175 | |
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176 | void |
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177 | NanoVis::orientCamera(double *quat) |
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178 | { |
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179 | _camera->orient(quat); |
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180 | |
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181 | collectBounds(); |
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182 | _camera->resetClippingRange(sceneBounds.min, sceneBounds.max); |
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183 | } |
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184 | |
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185 | void |
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186 | NanoVis::setCameraPosition(Vector3f pos) |
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187 | { |
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188 | _camera->setPosition(pos); |
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189 | |
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190 | collectBounds(); |
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191 | _camera->resetClippingRange(sceneBounds.min, sceneBounds.max); |
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192 | } |
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193 | |
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194 | void |
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195 | NanoVis::setCameraUpdir(Camera::AxisDirection dir) |
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196 | { |
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197 | _camera->setUpdir(dir); |
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198 | |
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199 | collectBounds(); |
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200 | _camera->resetClippingRange(sceneBounds.min, sceneBounds.max); |
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201 | } |
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202 | |
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203 | void |
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204 | NanoVis::resetCamera(bool resetOrientation) |
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205 | { |
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206 | TRACE("Resetting all=%d", resetOrientation ? 1 : 0); |
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207 | |
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208 | collectBounds(); |
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209 | _camera->reset(sceneBounds.min, sceneBounds.max, resetOrientation); |
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210 | } |
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211 | |
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212 | /** \brief Load a 3D volume |
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213 | * |
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214 | * \param name Volume ID |
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215 | * \param width Number of samples in X direction |
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216 | * \param height Number of samples in Y direction |
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217 | * \param depth Number of samples in Z direction |
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218 | * \param numComponents the number of scalars for each space point. All component |
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219 | * scalars for a point are placed consequtively in data array |
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220 | * width, height and depth: number of points in each dimension |
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221 | * \param data Array of floats |
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222 | * \param vmin Min value of field |
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223 | * \param vmax Max value of field |
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224 | * \param nonZeroMin Minimum non-zero value of field |
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225 | * \param data pointer to an array of floats. |
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226 | */ |
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227 | Volume * |
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228 | NanoVis::loadVolume(const char *name, int width, int height, int depth, |
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229 | int numComponents, float *data, double vmin, double vmax, |
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230 | double nonZeroMin) |
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231 | { |
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232 | VolumeHashmap::iterator itr = volumeTable.find(name); |
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233 | if (itr != volumeTable.end()) { |
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234 | WARN("volume \"%s\" already exists", name); |
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235 | removeVolume(itr->second); |
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236 | } |
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237 | |
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238 | Volume *volume = new Volume(width, height, depth, |
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239 | numComponents, |
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240 | data, vmin, vmax, nonZeroMin); |
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241 | Volume::updatePending = true; |
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242 | volume->name(name); |
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243 | volumeTable[name] = volume; |
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244 | |
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245 | return volume; |
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246 | } |
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247 | |
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248 | // Gets a colormap 1D texture by name. |
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249 | TransferFunction * |
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250 | NanoVis::getTransferFunction(const TransferFunctionId& id) |
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251 | { |
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252 | TransferFunctionHashmap::iterator itr = tfTable.find(id); |
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253 | if (itr == tfTable.end()) { |
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254 | TRACE("No transfer function named \"%s\" found", id.c_str()); |
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255 | return NULL; |
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256 | } else { |
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257 | return itr->second; |
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258 | } |
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259 | } |
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260 | |
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261 | // Creates of updates a colormap 1D texture by name. |
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262 | TransferFunction * |
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263 | NanoVis::defineTransferFunction(const TransferFunctionId& id, |
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264 | size_t n, float *data) |
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265 | { |
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266 | TransferFunction *tf = getTransferFunction(id); |
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267 | if (tf == NULL) { |
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268 | TRACE("Creating new transfer function \"%s\"", id.c_str()); |
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269 | tf = new TransferFunction(id.c_str(), n, data); |
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270 | tfTable[id] = tf; |
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271 | } else { |
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272 | TRACE("Updating existing transfer function \"%s\"", id.c_str()); |
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273 | tf->update(n, data); |
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274 | } |
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275 | return tf; |
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276 | } |
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277 | |
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278 | int |
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279 | NanoVis::renderLegend(TransferFunction *tf, double min, double max, |
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280 | int width, int height, const char *volArg) |
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281 | { |
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282 | TRACE("Enter"); |
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283 | |
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284 | int old_width = winWidth; |
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285 | int old_height = winHeight; |
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286 | |
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287 | planeRenderer->setScreenSize(width, height); |
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288 | resizeOffscreenBuffer(width, height); |
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289 | |
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290 | // generate data for the legend |
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291 | float data[512]; |
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292 | for (int i=0; i < 256; i++) { |
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293 | data[i] = data[i+256] = (float)(i/255.0); |
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294 | } |
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295 | legendTexture = new Texture2D(256, 2, GL_FLOAT, GL_LINEAR, 1, data); |
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296 | int index = planeRenderer->addPlane(legendTexture, tf); |
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297 | planeRenderer->setActivePlane(index); |
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298 | |
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299 | bindOffscreenBuffer(); |
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300 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //clear screen |
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301 | planeRenderer->render(); |
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302 | |
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303 | glPixelStorei(GL_PACK_ALIGNMENT, 1); |
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304 | glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, screenBuffer); |
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305 | { |
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306 | char prefix[200]; |
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307 | |
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308 | TRACE("Sending ppm legend image %s min:%g max:%g", volArg, min, max); |
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309 | sprintf(prefix, "nv>legend %s %g %g", volArg, min, max); |
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310 | #ifdef USE_THREADS |
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311 | queuePPM(g_queue, prefix, screenBuffer, width, height); |
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312 | #else |
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313 | writePPM(g_fdOut, prefix, screenBuffer, width, height); |
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314 | #endif |
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315 | } |
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316 | planeRenderer->removePlane(index); |
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317 | resizeOffscreenBuffer(old_width, old_height); |
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318 | |
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319 | delete legendTexture; |
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320 | legendTexture = NULL; |
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321 | TRACE("Leave"); |
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322 | return TCL_OK; |
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323 | } |
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324 | |
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325 | //initialize frame buffer objects for offscreen rendering |
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326 | bool |
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327 | NanoVis::initOffscreenBuffer() |
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328 | { |
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329 | TRACE("Enter"); |
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330 | assert(_finalFbo == 0); |
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331 | // Initialize a fbo for final display. |
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332 | glGenFramebuffersEXT(1, &_finalFbo); |
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333 | |
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334 | glGenTextures(1, &_finalColorTex); |
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335 | glBindTexture(GL_TEXTURE_2D, _finalColorTex); |
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336 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
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337 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
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338 | #if defined(HAVE_FLOAT_TEXTURES) && defined(USE_HALF_FLOAT) |
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339 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, winWidth, winHeight, 0, |
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340 | GL_RGB, GL_INT, NULL); |
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341 | #elif defined(HAVE_FLOAT_TEXTURES) |
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342 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, winWidth, winHeight, 0, |
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343 | GL_RGB, GL_INT, NULL); |
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344 | #else |
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345 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, winWidth, winHeight, 0, |
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346 | GL_RGB, GL_INT, NULL); |
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347 | #endif |
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348 | |
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349 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _finalFbo); |
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350 | glGenRenderbuffersEXT(1, &_finalDepthRb); |
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351 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb); |
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352 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, |
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353 | winWidth, winHeight); |
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354 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, |
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355 | GL_TEXTURE_2D, _finalColorTex, 0); |
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356 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, |
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357 | GL_RENDERBUFFER_EXT, _finalDepthRb); |
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358 | |
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359 | GLenum status; |
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360 | if (!CheckFBO(&status)) { |
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361 | PrintFBOStatus(status, "finalFbo"); |
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362 | return false; |
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363 | } |
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364 | |
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365 | TRACE("Leave"); |
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366 | return true; |
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367 | } |
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368 | |
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369 | //resize the offscreen buffer |
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370 | bool |
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371 | NanoVis::resizeOffscreenBuffer(int w, int h) |
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372 | { |
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373 | TRACE("Enter (%d, %d)", w, h); |
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374 | if ((w == winWidth) && (h == winHeight)) { |
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375 | return true; |
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376 | } |
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377 | winWidth = w; |
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378 | winHeight = h; |
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379 | |
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380 | if (fonts) { |
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381 | fonts->resize(w, h); |
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382 | } |
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383 | TRACE("screenBuffer size: %d %d", w, h); |
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384 | |
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385 | if (screenBuffer != NULL) { |
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386 | delete [] screenBuffer; |
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387 | screenBuffer = NULL; |
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388 | } |
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389 | |
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390 | screenBuffer = new unsigned char[3*winWidth*winHeight]; |
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391 | assert(screenBuffer != NULL); |
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392 | |
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393 | //delete the current render buffer resources |
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394 | glDeleteTextures(1, &_finalColorTex); |
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395 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb); |
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396 | glDeleteRenderbuffersEXT(1, &_finalDepthRb); |
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397 | |
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398 | TRACE("before deleteframebuffers"); |
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399 | glDeleteFramebuffersEXT(1, &_finalFbo); |
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400 | |
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401 | TRACE("reinitialize FBO"); |
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402 | //Reinitialize final fbo for final display |
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403 | glGenFramebuffersEXT(1, &_finalFbo); |
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404 | |
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405 | glGenTextures(1, &_finalColorTex); |
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406 | glBindTexture(GL_TEXTURE_2D, _finalColorTex); |
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407 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
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408 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
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409 | #if defined(HAVE_FLOAT_TEXTURES) && defined(USE_HALF_FLOAT) |
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410 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, winWidth, winHeight, 0, |
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411 | GL_RGB, GL_INT, NULL); |
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412 | #elif defined(HAVE_FLOAT_TEXTURES) |
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413 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, winWidth, winHeight, 0, |
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414 | GL_RGB, GL_INT, NULL); |
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415 | #else |
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416 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, winWidth, winHeight, 0, |
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417 | GL_RGB, GL_INT, NULL); |
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418 | #endif |
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419 | |
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420 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _finalFbo); |
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421 | glGenRenderbuffersEXT(1, &_finalDepthRb); |
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422 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb); |
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423 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, |
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424 | winWidth, winHeight); |
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425 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, |
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426 | GL_TEXTURE_2D, _finalColorTex, 0); |
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427 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, |
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428 | GL_RENDERBUFFER_EXT, _finalDepthRb); |
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429 | |
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430 | GLenum status; |
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431 | if (!CheckFBO(&status)) { |
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432 | PrintFBOStatus(status, "finalFbo"); |
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433 | return false; |
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434 | } |
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435 | |
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436 | TRACE("change camera"); |
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437 | //change the camera setting |
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438 | _camera->setViewport(0, 0, winWidth, winHeight); |
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439 | planeRenderer->setScreenSize(winWidth, winHeight); |
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440 | |
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441 | TRACE("Leave (%d, %d)", w, h); |
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442 | return true; |
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443 | } |
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444 | |
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445 | bool NanoVis::init(const char* path) |
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446 | { |
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447 | // print OpenGL driver information |
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448 | TRACE("-----------------------------------------------------------"); |
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449 | TRACE("OpenGL version: %s", glGetString(GL_VERSION)); |
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450 | TRACE("OpenGL vendor: %s", glGetString(GL_VENDOR)); |
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451 | TRACE("OpenGL renderer: %s", glGetString(GL_RENDERER)); |
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452 | TRACE("-----------------------------------------------------------"); |
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453 | |
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454 | if (path == NULL) { |
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455 | ERROR("No path defined for shaders or resources"); |
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456 | return false; |
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457 | } |
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458 | GLenum err = glewInit(); |
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459 | if (GLEW_OK != err) { |
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460 | ERROR("Can't init GLEW: %s", glewGetErrorString(err)); |
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461 | return false; |
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462 | } |
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463 | TRACE("Using GLEW %s", glewGetString(GLEW_VERSION)); |
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464 | |
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465 | // OpenGL 2.1 includes VBOs, PBOs, MRT, NPOT textures, point parameters, point sprites, |
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466 | // GLSL 1.2, and occlusion queries. |
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467 | if (!GLEW_VERSION_2_1) { |
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468 | ERROR("OpenGL version 2.1 or greater is required"); |
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469 | return false; |
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470 | } |
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471 | |
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472 | // NVIDIA driver may report OpenGL 2.1, but not support PBOs in |
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473 | // indirect GLX contexts |
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474 | if (!GLEW_ARB_pixel_buffer_object) { |
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475 | ERROR("Pixel buffer objects are not supported by driver, please check that the user running nanovis has permissions to create a direct rendering context (e.g. user has read/write access to /dev/nvidia* device nodes in Linux)."); |
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476 | return false; |
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477 | } |
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478 | |
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479 | // Additional extensions not in 2.1 core |
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480 | |
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481 | // Framebuffer objects were promoted in 3.0 |
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482 | if (!GLEW_EXT_framebuffer_object) { |
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483 | ERROR("EXT_framebuffer_oject extension is required"); |
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484 | return false; |
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485 | } |
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486 | // Rectangle textures were promoted in 3.1 |
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487 | // FIXME: can use NPOT in place of rectangle textures |
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488 | if (!GLEW_ARB_texture_rectangle) { |
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489 | ERROR("ARB_texture_rectangle extension is required"); |
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490 | return false; |
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491 | } |
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492 | #ifdef HAVE_FLOAT_TEXTURES |
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493 | // Float color buffers and textures were promoted in 3.0 |
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494 | if (!GLEW_ARB_texture_float || |
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495 | !GLEW_ARB_color_buffer_float) { |
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496 | ERROR("ARB_texture_float and ARB_color_buffer_float extensions are required"); |
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497 | return false; |
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498 | } |
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499 | #endif |
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500 | // FIXME: should use GLSL for portability |
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501 | #ifdef USE_ARB_PROGRAMS |
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502 | if (!GLEW_ARB_vertex_program || |
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503 | !GLEW_ARB_fragment_program) { |
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504 | ERROR("ARB_vertex_program and ARB_fragment_program extensions are required"); |
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505 | return false; |
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506 | } |
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507 | #else |
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508 | if (!GLEW_NV_vertex_program3 || |
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509 | !GLEW_NV_fragment_program2) { |
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510 | ERROR("NV_vertex_program3 and NV_fragment_program2 extensions are required"); |
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511 | return false; |
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512 | } |
---|
513 | #endif |
---|
514 | |
---|
515 | if (!FilePath::getInstance()->setPath(path)) { |
---|
516 | ERROR("can't set file path to %s", path); |
---|
517 | return false; |
---|
518 | } |
---|
519 | |
---|
520 | ImageLoaderFactory::getInstance()->addLoaderImpl("bmp", new BMPImageLoaderImpl()); |
---|
521 | |
---|
522 | return true; |
---|
523 | } |
---|
524 | |
---|
525 | bool |
---|
526 | NanoVis::initGL() |
---|
527 | { |
---|
528 | TRACE("in initGL"); |
---|
529 | //buffer to store data read from the screen |
---|
530 | if (screenBuffer) { |
---|
531 | delete[] screenBuffer; |
---|
532 | screenBuffer = NULL; |
---|
533 | } |
---|
534 | screenBuffer = new unsigned char[3*winWidth*winHeight]; |
---|
535 | assert(screenBuffer != NULL); |
---|
536 | |
---|
537 | //create the camera with default setting |
---|
538 | _camera = new Camera(0, 0, winWidth, winHeight); |
---|
539 | |
---|
540 | glEnable(GL_TEXTURE_2D); |
---|
541 | glShadeModel(GL_FLAT); |
---|
542 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
---|
543 | glClearColor(0, 0, 0, 1); |
---|
544 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
---|
545 | |
---|
546 | //initialize lighting |
---|
547 | GLfloat mat_specular[] = {1.0, 1.0, 1.0, 1.0}; |
---|
548 | GLfloat mat_shininess[] = {30.0}; |
---|
549 | GLfloat white_light[] = {1.0, 1.0, 1.0, 1.0}; |
---|
550 | |
---|
551 | glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); |
---|
552 | glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess); |
---|
553 | glLightfv(GL_LIGHT0, GL_DIFFUSE, white_light); |
---|
554 | glLightfv(GL_LIGHT0, GL_SPECULAR, white_light); |
---|
555 | glLightfv(GL_LIGHT1, GL_DIFFUSE, white_light); |
---|
556 | glLightfv(GL_LIGHT1, GL_SPECULAR, white_light); |
---|
557 | |
---|
558 | //frame buffer object for offscreen rendering |
---|
559 | if (!initOffscreenBuffer()) { |
---|
560 | return false; |
---|
561 | } |
---|
562 | |
---|
563 | fonts = new Fonts(); |
---|
564 | fonts->addFont("verdana", "verdana.fnt"); |
---|
565 | fonts->setFont("verdana"); |
---|
566 | |
---|
567 | renderContext = new RenderContext(); |
---|
568 | |
---|
569 | volRenderer = new VolumeRenderer(); |
---|
570 | |
---|
571 | planeRenderer = new PlaneRenderer(winWidth, winHeight); |
---|
572 | |
---|
573 | velocityArrowsSlice = new VelocityArrowsSlice(); |
---|
574 | |
---|
575 | licRenderer = new LIC(); |
---|
576 | |
---|
577 | orientationIndicator = new OrientationIndicator(); |
---|
578 | |
---|
579 | grid = new Grid(); |
---|
580 | grid->setFont(fonts); |
---|
581 | |
---|
582 | //assert(glGetError()==0); |
---|
583 | |
---|
584 | TRACE("leaving initGL"); |
---|
585 | return true; |
---|
586 | } |
---|
587 | |
---|
588 | void NanoVis::update() |
---|
589 | { |
---|
590 | VolumeInterpolator *volInterp = volRenderer->getVolumeInterpolator(); |
---|
591 | if (volInterp->isStarted()) { |
---|
592 | struct timeval clock; |
---|
593 | gettimeofday(&clock, NULL); |
---|
594 | double elapsed_time; |
---|
595 | |
---|
596 | elapsed_time = clock.tv_sec + clock.tv_usec/1000000.0 - |
---|
597 | volInterp->getStartTime(); |
---|
598 | |
---|
599 | TRACE("%lf %lf", elapsed_time, |
---|
600 | volInterp->getInterval()); |
---|
601 | float fraction; |
---|
602 | float f; |
---|
603 | |
---|
604 | f = fmod((float) elapsed_time, (float)volInterp->getInterval()); |
---|
605 | if (f == 0.0) { |
---|
606 | fraction = 0.0f; |
---|
607 | } else { |
---|
608 | fraction = f / volInterp->getInterval(); |
---|
609 | } |
---|
610 | TRACE("fraction : %f", fraction); |
---|
611 | volInterp->update(fraction); |
---|
612 | } |
---|
613 | } |
---|
614 | |
---|
615 | /** |
---|
616 | * \brief Called when new volumes are added to update ranges |
---|
617 | */ |
---|
618 | void |
---|
619 | NanoVis::setVolumeRanges() |
---|
620 | { |
---|
621 | TRACE("Enter"); |
---|
622 | |
---|
623 | double valueMin = DBL_MAX, valueMax = -DBL_MAX; |
---|
624 | VolumeHashmap::iterator itr; |
---|
625 | for (itr = volumeTable.begin(); |
---|
626 | itr != volumeTable.end(); ++itr) { |
---|
627 | Volume *volume = itr->second; |
---|
628 | if (valueMin > volume->wAxis.min()) { |
---|
629 | valueMin = volume->wAxis.min(); |
---|
630 | } |
---|
631 | if (valueMax < volume->wAxis.max()) { |
---|
632 | valueMax = volume->wAxis.max(); |
---|
633 | } |
---|
634 | } |
---|
635 | if ((valueMin < DBL_MAX) && (valueMax > -DBL_MAX)) { |
---|
636 | Volume::valueMin = valueMin; |
---|
637 | Volume::valueMax = valueMax; |
---|
638 | } |
---|
639 | Volume::updatePending = false; |
---|
640 | TRACE("Leave"); |
---|
641 | } |
---|
642 | |
---|
643 | /** |
---|
644 | * \brief Called when new heightmaps are added to update ranges |
---|
645 | */ |
---|
646 | void |
---|
647 | NanoVis::setHeightmapRanges() |
---|
648 | { |
---|
649 | TRACE("Enter"); |
---|
650 | |
---|
651 | double valueMin = DBL_MAX, valueMax = -DBL_MAX; |
---|
652 | HeightMapHashmap::iterator itr; |
---|
653 | for (itr = heightMapTable.begin(); |
---|
654 | itr != heightMapTable.end(); ++itr) { |
---|
655 | HeightMap *heightMap = itr->second; |
---|
656 | if (valueMin > heightMap->wAxis.min()) { |
---|
657 | valueMin = heightMap->wAxis.min(); |
---|
658 | } |
---|
659 | if (valueMax < heightMap->wAxis.max()) { |
---|
660 | valueMax = heightMap->wAxis.max(); |
---|
661 | } |
---|
662 | } |
---|
663 | if ((valueMin < DBL_MAX) && (valueMax > -DBL_MAX)) { |
---|
664 | HeightMap::valueMin = valueMin; |
---|
665 | HeightMap::valueMax = valueMax; |
---|
666 | } |
---|
667 | for (HeightMapHashmap::iterator itr = heightMapTable.begin(); |
---|
668 | itr != heightMapTable.end(); ++itr) { |
---|
669 | itr->second->mapToGrid(grid); |
---|
670 | } |
---|
671 | HeightMap::updatePending = false; |
---|
672 | TRACE("Leave"); |
---|
673 | } |
---|
674 | |
---|
675 | void |
---|
676 | NanoVis::collectBounds(bool onlyVisible) |
---|
677 | { |
---|
678 | sceneBounds.makeEmpty(); |
---|
679 | |
---|
680 | for (VolumeHashmap::iterator itr = volumeTable.begin(); |
---|
681 | itr != volumeTable.end(); ++itr) { |
---|
682 | Volume *volume = itr->second; |
---|
683 | |
---|
684 | if (onlyVisible && !volume->visible()) |
---|
685 | continue; |
---|
686 | |
---|
687 | BBox bbox; |
---|
688 | volume->getBounds(bbox.min, bbox.max); |
---|
689 | sceneBounds.extend(bbox); |
---|
690 | } |
---|
691 | |
---|
692 | for (HeightMapHashmap::iterator itr = heightMapTable.begin(); |
---|
693 | itr != heightMapTable.end(); ++itr) { |
---|
694 | HeightMap *heightMap = itr->second; |
---|
695 | |
---|
696 | if (onlyVisible && !heightMap->isVisible()) |
---|
697 | continue; |
---|
698 | |
---|
699 | BBox bbox; |
---|
700 | heightMap->getBounds(bbox.min, bbox.max); |
---|
701 | sceneBounds.extend(bbox); |
---|
702 | } |
---|
703 | |
---|
704 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
705 | itr != flowTable.end(); ++itr) { |
---|
706 | Flow *flow = itr->second; |
---|
707 | |
---|
708 | BBox bbox; |
---|
709 | flow->getBounds(bbox.min, bbox.max, onlyVisible); |
---|
710 | sceneBounds.extend(bbox); |
---|
711 | } |
---|
712 | |
---|
713 | if (!sceneBounds.isEmptyX()) { |
---|
714 | grid->xAxis.setScale(sceneBounds.min.x, sceneBounds.max.x); |
---|
715 | } |
---|
716 | if (!sceneBounds.isEmptyY()) { |
---|
717 | grid->yAxis.setScale(sceneBounds.min.y, sceneBounds.max.y); |
---|
718 | } |
---|
719 | if (!sceneBounds.isEmptyZ()) { |
---|
720 | grid->zAxis.setScale(sceneBounds.min.z, sceneBounds.max.z); |
---|
721 | } |
---|
722 | |
---|
723 | #if 0 |
---|
724 | if (!onlyVisible || grid->isVisible()) { |
---|
725 | BBox bbox; |
---|
726 | grid->getBounds(bbox.min, bbox.max); |
---|
727 | sceneBounds.extend(bbox); |
---|
728 | } |
---|
729 | #endif |
---|
730 | |
---|
731 | if (sceneBounds.isEmpty()) { |
---|
732 | sceneBounds.min.set(-0.5, -0.5, -0.5); |
---|
733 | sceneBounds.max.set( 0.5, 0.5, 0.5); |
---|
734 | } |
---|
735 | |
---|
736 | TRACE("Scene bounds: (%g,%g,%g) - (%g,%g,%g)", |
---|
737 | sceneBounds.min.x, sceneBounds.min.y, sceneBounds.min.z, |
---|
738 | sceneBounds.max.x, sceneBounds.max.y, sceneBounds.max.z); |
---|
739 | } |
---|
740 | |
---|
741 | void |
---|
742 | NanoVis::setBgColor(float color[3]) |
---|
743 | { |
---|
744 | TRACE("Setting bgcolor to %g %g %g", color[0], color[1], color[2]); |
---|
745 | glClearColor(color[0], color[1], color[2], 1); |
---|
746 | } |
---|
747 | |
---|
748 | void |
---|
749 | NanoVis::removeVolume(Volume *volume) |
---|
750 | { |
---|
751 | VolumeHashmap::iterator itr = volumeTable.find(volume->name()); |
---|
752 | if (itr != volumeTable.end()) { |
---|
753 | volumeTable.erase(itr); |
---|
754 | } |
---|
755 | delete volume; |
---|
756 | } |
---|
757 | |
---|
758 | Flow * |
---|
759 | NanoVis::getFlow(const char *name) |
---|
760 | { |
---|
761 | FlowHashmap::iterator itr = flowTable.find(name); |
---|
762 | if (itr == flowTable.end()) { |
---|
763 | TRACE("Can't find flow '%s'", name); |
---|
764 | return NULL; |
---|
765 | } |
---|
766 | return itr->second; |
---|
767 | } |
---|
768 | |
---|
769 | Flow * |
---|
770 | NanoVis::createFlow(Tcl_Interp *interp, const char *name) |
---|
771 | { |
---|
772 | FlowHashmap::iterator itr = flowTable.find(name); |
---|
773 | if (itr != flowTable.end()) { |
---|
774 | ERROR("Flow '%s' already exists", name); |
---|
775 | return NULL; |
---|
776 | } |
---|
777 | Flow *flow = new Flow(interp, name); |
---|
778 | flowTable[name] = flow; |
---|
779 | return flow; |
---|
780 | } |
---|
781 | |
---|
782 | /** |
---|
783 | * \brief Delete flow object and hash table entry |
---|
784 | * |
---|
785 | * This is called by the flow command instance delete callback |
---|
786 | */ |
---|
787 | void |
---|
788 | NanoVis::deleteFlow(const char *name) |
---|
789 | { |
---|
790 | FlowHashmap::iterator itr = flowTable.find(name); |
---|
791 | if (itr != flowTable.end()) { |
---|
792 | delete itr->second; |
---|
793 | flowTable.erase(itr); |
---|
794 | } |
---|
795 | } |
---|
796 | |
---|
797 | /** |
---|
798 | * \brief Delete all flow object commands |
---|
799 | * |
---|
800 | * This will also delete the flow objects and hash table entries |
---|
801 | */ |
---|
802 | void |
---|
803 | NanoVis::deleteFlows(Tcl_Interp *interp) |
---|
804 | { |
---|
805 | FlowHashmap::iterator itr; |
---|
806 | for (itr = flowTable.begin(); |
---|
807 | itr != flowTable.end(); ++itr) { |
---|
808 | Tcl_DeleteCommandFromToken(interp, itr->second->getCommandToken()); |
---|
809 | } |
---|
810 | flowTable.clear(); |
---|
811 | } |
---|
812 | |
---|
813 | /** |
---|
814 | * \brief Called when new flows are added to update ranges |
---|
815 | */ |
---|
816 | bool |
---|
817 | NanoVis::setFlowRanges() |
---|
818 | { |
---|
819 | TRACE("Enter"); |
---|
820 | |
---|
821 | /* |
---|
822 | * Step 1. Get the overall min and max magnitudes of all the |
---|
823 | * flow vectors. |
---|
824 | */ |
---|
825 | Flow::magMin = DBL_MAX; |
---|
826 | Flow::magMax = -DBL_MAX; |
---|
827 | |
---|
828 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
829 | itr != flowTable.end(); ++itr) { |
---|
830 | Flow *flow = itr->second; |
---|
831 | if (!flow->isDataLoaded()) { |
---|
832 | continue; |
---|
833 | } |
---|
834 | double range[2]; |
---|
835 | flow->getVectorRange(range); |
---|
836 | if (range[0] < Flow::magMin) { |
---|
837 | Flow::magMin = range[0]; |
---|
838 | } |
---|
839 | if (range[1] > Flow::magMax) { |
---|
840 | Flow::magMax = range[1]; |
---|
841 | } |
---|
842 | } |
---|
843 | |
---|
844 | TRACE("magMin=%g magMax=%g", Flow::magMin, Flow::magMax); |
---|
845 | |
---|
846 | /* |
---|
847 | * Step 2. Generate the vector field from each data set. |
---|
848 | */ |
---|
849 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
850 | itr != flowTable.end(); ++itr) { |
---|
851 | Flow *flow = itr->second; |
---|
852 | if (!flow->isDataLoaded()) { |
---|
853 | continue; // Flow exists, but no data has been loaded yet. |
---|
854 | } |
---|
855 | if (flow->visible()) { |
---|
856 | flow->initializeParticles(); |
---|
857 | } |
---|
858 | } |
---|
859 | |
---|
860 | Flow::updatePending = false; |
---|
861 | return true; |
---|
862 | } |
---|
863 | |
---|
864 | void |
---|
865 | NanoVis::renderFlows() |
---|
866 | { |
---|
867 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
868 | itr != flowTable.end(); ++itr) { |
---|
869 | Flow *flow = itr->second; |
---|
870 | if (flow->isDataLoaded() && flow->visible()) { |
---|
871 | flow->render(); |
---|
872 | } |
---|
873 | } |
---|
874 | } |
---|
875 | |
---|
876 | void |
---|
877 | NanoVis::resetFlows() |
---|
878 | { |
---|
879 | NanoVis::licRenderer->reset(); |
---|
880 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
881 | itr != flowTable.end(); ++itr) { |
---|
882 | Flow *flow = itr->second; |
---|
883 | if (flow->isDataLoaded()) { |
---|
884 | flow->resetParticles(); |
---|
885 | } |
---|
886 | } |
---|
887 | } |
---|
888 | |
---|
889 | void |
---|
890 | NanoVis::advectFlows() |
---|
891 | { |
---|
892 | TRACE("Enter"); |
---|
893 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
894 | itr != flowTable.end(); ++itr) { |
---|
895 | Flow *flow = itr->second; |
---|
896 | if (flow->isDataLoaded()) { |
---|
897 | flow->advect(); |
---|
898 | } |
---|
899 | } |
---|
900 | } |
---|
901 | |
---|
902 | void |
---|
903 | NanoVis::render() |
---|
904 | { |
---|
905 | TRACE("Enter"); |
---|
906 | |
---|
907 | if (Flow::updatePending) { |
---|
908 | setFlowRanges(); |
---|
909 | } |
---|
910 | if (HeightMap::updatePending) { |
---|
911 | setHeightmapRanges(); |
---|
912 | } |
---|
913 | if (Volume::updatePending) { |
---|
914 | setVolumeRanges(); |
---|
915 | } |
---|
916 | |
---|
917 | collectBounds(); |
---|
918 | |
---|
919 | // Start final rendering |
---|
920 | |
---|
921 | // Need to reset fbo since it may have been changed to default (0) |
---|
922 | bindOffscreenBuffer(); |
---|
923 | |
---|
924 | //clear screen |
---|
925 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
---|
926 | |
---|
927 | glEnable(GL_DEPTH_TEST); |
---|
928 | glEnable(GL_COLOR_MATERIAL); |
---|
929 | |
---|
930 | // Emit modelview and projection matrices |
---|
931 | _camera->initialize(); |
---|
932 | |
---|
933 | // Now render things in the scene |
---|
934 | |
---|
935 | orientationIndicator->setPosition(sceneBounds.getCenter()); |
---|
936 | orientationIndicator->setScale(sceneBounds.getSize()); |
---|
937 | orientationIndicator->render(); |
---|
938 | |
---|
939 | grid->render(); |
---|
940 | |
---|
941 | licRenderer->render(); |
---|
942 | |
---|
943 | velocityArrowsSlice->render(); |
---|
944 | |
---|
945 | renderFlows(); |
---|
946 | |
---|
947 | volRenderer->renderAll(); |
---|
948 | |
---|
949 | for (HeightMapHashmap::iterator itr = heightMapTable.begin(); |
---|
950 | itr != heightMapTable.end(); ++itr) { |
---|
951 | itr->second->render(renderContext); |
---|
952 | } |
---|
953 | |
---|
954 | CHECK_FRAMEBUFFER_STATUS(); |
---|
955 | TRACE("Leave"); |
---|
956 | redrawPending = false; |
---|
957 | } |
---|