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 <sys/types.h> |
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20 | #include <sys/uio.h> // for writev in ppmWrite |
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21 | #include <unistd.h> |
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22 | |
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23 | #include <cassert> |
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24 | #include <cerrno> |
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25 | #include <cstdlib> |
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26 | #include <cstdio> |
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27 | #include <cstring> |
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28 | #include <cmath> |
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29 | |
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30 | #include <string> |
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31 | |
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32 | #include <GL/glew.h> |
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33 | #include <GL/glut.h> |
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34 | |
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35 | #include <graphics/RenderContext.h> |
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36 | #include <vrmath/Vector3f.h> |
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37 | |
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38 | #include <util/FilePath.h> |
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39 | #include <util/Fonts.h> |
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40 | |
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41 | #include <BMPImageLoaderImpl.h> |
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42 | #include <ImageLoaderFactory.h> |
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43 | |
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44 | #include "config.h" |
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45 | #include "nanovis.h" |
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46 | #include "nanovisServer.h" |
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47 | #include "define.h" |
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48 | |
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49 | #include "Flow.h" |
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50 | #include "Grid.h" |
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51 | #include "HeightMap.h" |
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52 | #include "Camera.h" |
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53 | #include "LIC.h" |
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54 | #include "Shader.h" |
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55 | #include "PlaneRenderer.h" |
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56 | #include "Texture2D.h" |
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57 | #include "Trace.h" |
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58 | #include "TransferFunction.h" |
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59 | #include "Unirect.h" |
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60 | #include "VelocityArrowsSlice.h" |
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61 | #include "Volume.h" |
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62 | #include "VolumeInterpolator.h" |
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63 | #include "VolumeRenderer.h" |
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64 | |
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65 | using namespace nv; |
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66 | using namespace nv::graphics; |
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67 | using namespace nv::util; |
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68 | using namespace vrmath; |
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69 | |
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70 | #define SIZEOF_BMP_HEADER 54 |
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71 | |
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72 | // STATIC MEMBER DATA |
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73 | |
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74 | Tcl_Interp *NanoVis::interp = NULL; |
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75 | |
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76 | bool NanoVis::redrawPending = false; |
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77 | bool NanoVis::debugFlag = false; |
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78 | bool NanoVis::axisOn = true; |
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79 | |
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80 | int NanoVis::winWidth = NPIX; |
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81 | int NanoVis::winHeight = NPIX; |
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82 | int NanoVis::renderWindow = 0; |
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83 | unsigned char *NanoVis::screenBuffer = NULL; |
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84 | Texture2D *NanoVis::legendTexture = NULL; |
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85 | Fonts *NanoVis::fonts; |
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86 | Camera *NanoVis::_camera = NULL; |
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87 | RenderContext *NanoVis::renderContext = NULL; |
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88 | |
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89 | NanoVis::TransferFunctionHashmap NanoVis::tfTable; |
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90 | NanoVis::VolumeHashmap NanoVis::volumeTable; |
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91 | NanoVis::FlowHashmap NanoVis::flowTable; |
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92 | NanoVis::HeightMapHashmap NanoVis::heightMapTable; |
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93 | |
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94 | double NanoVis::magMin = DBL_MAX; |
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95 | double NanoVis::magMax = -DBL_MAX; |
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96 | float NanoVis::xMin = FLT_MAX; |
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97 | float NanoVis::xMax = -FLT_MAX; |
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98 | float NanoVis::yMin = FLT_MAX; |
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99 | float NanoVis::yMax = -FLT_MAX; |
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100 | float NanoVis::zMin = FLT_MAX; |
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101 | float NanoVis::zMax = -FLT_MAX; |
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102 | float NanoVis::wMin = FLT_MAX; |
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103 | float NanoVis::wMax = -FLT_MAX; |
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104 | Vector3f NanoVis::sceneMin, NanoVis::sceneMax; |
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105 | |
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106 | VolumeRenderer *NanoVis::volRenderer = NULL; |
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107 | VelocityArrowsSlice *NanoVis::velocityArrowsSlice = NULL; |
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108 | LIC *NanoVis::licRenderer = NULL; |
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109 | PlaneRenderer *NanoVis::planeRenderer = NULL; |
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110 | Grid *NanoVis::grid = NULL; |
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111 | |
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112 | //frame buffer for final rendering |
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113 | GLuint NanoVis::_finalFbo = 0; |
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114 | GLuint NanoVis::_finalColorTex = 0; |
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115 | GLuint NanoVis::_finalDepthRb = 0; |
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116 | |
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117 | // Default camera location. |
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118 | Vector3f def_eye(0.0f, 0.0f, 2.5f); |
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119 | |
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120 | void |
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121 | NanoVis::removeAllData() |
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122 | { |
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123 | TRACE("Enter"); |
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124 | |
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125 | if (grid != NULL) { |
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126 | TRACE("Deleting grid"); |
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127 | delete grid; |
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128 | } |
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129 | if (_camera != NULL) { |
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130 | TRACE("Deleting camera"); |
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131 | delete _camera; |
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132 | } |
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133 | if (volRenderer != NULL) { |
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134 | TRACE("Deleting volRenderer"); |
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135 | delete volRenderer; |
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136 | } |
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137 | if (planeRenderer != NULL) { |
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138 | TRACE("Deleting planeRenderer"); |
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139 | delete planeRenderer; |
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140 | } |
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141 | if (legendTexture != NULL) { |
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142 | TRACE("Deleting legendTexture"); |
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143 | delete legendTexture; |
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144 | } |
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145 | TRACE("Deleting flows"); |
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146 | deleteFlows(interp); |
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147 | if (licRenderer != NULL) { |
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148 | TRACE("Deleting licRenderer"); |
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149 | delete licRenderer; |
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150 | } |
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151 | if (velocityArrowsSlice != NULL) { |
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152 | TRACE("Deleting velocityArrowsSlice"); |
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153 | delete velocityArrowsSlice; |
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154 | } |
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155 | if (renderContext != NULL) { |
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156 | TRACE("Deleting renderContext"); |
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157 | delete renderContext; |
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158 | } |
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159 | if (screenBuffer != NULL) { |
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160 | TRACE("Deleting screenBuffer"); |
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161 | delete [] screenBuffer; |
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162 | screenBuffer = NULL; |
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163 | } |
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164 | if (fonts != NULL) { |
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165 | TRACE("Deleting fonts"); |
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166 | delete fonts; |
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167 | } |
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168 | TRACE("Leave"); |
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169 | } |
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170 | |
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171 | void |
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172 | NanoVis::eventuallyRedraw() |
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173 | { |
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174 | if (!redrawPending) { |
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175 | glutPostRedisplay(); |
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176 | redrawPending = true; |
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177 | } |
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178 | } |
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179 | |
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180 | void |
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181 | NanoVis::panCamera(float dx, float dy) |
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182 | { |
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183 | /* Move the camera and its target by equal amounts along the x and y |
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184 | * axes. */ |
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185 | TRACE("pan: x=%f, y=%f", dx, dy); |
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186 | |
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187 | _camera->x(def_eye.x - dx); |
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188 | _camera->y(def_eye.y + dy); |
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189 | TRACE("set eye to %f %f", _camera->x(), _camera->y()); |
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190 | } |
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191 | |
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192 | void |
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193 | NanoVis::zoomCamera(float z) |
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194 | { |
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195 | /* Move the camera and its target by equal amounts along the x and y |
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196 | * axes. */ |
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197 | TRACE("zoom: z=%f", z); |
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198 | |
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199 | _camera->z(def_eye.z / z); |
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200 | |
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201 | collectBounds(); |
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202 | _camera->resetClippingRange(sceneMin, sceneMax); |
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203 | |
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204 | TRACE("set camera z to %f", _camera->z()); |
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205 | } |
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206 | |
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207 | void |
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208 | NanoVis::rotateCamera(float phi, float theta, float psi) |
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209 | { |
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210 | _camera->orient(phi, theta, psi); |
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211 | } |
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212 | |
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213 | void |
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214 | NanoVis::orientCamera(double *quat) |
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215 | { |
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216 | _camera->orient(quat); |
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217 | } |
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218 | |
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219 | void |
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220 | NanoVis::setCameraPosition(Vector3f pos) |
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221 | { |
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222 | _camera->setPosition(pos); |
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223 | } |
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224 | |
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225 | void |
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226 | NanoVis::setCameraUpdir(Camera::AxisDirection dir) |
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227 | { |
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228 | _camera->setUpdir(dir); |
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229 | } |
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230 | |
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231 | void |
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232 | NanoVis::resetCamera(bool resetOrientation) |
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233 | { |
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234 | TRACE("Resetting all=%d", resetOrientation ? 1 : 0); |
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235 | |
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236 | collectBounds(); |
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237 | _camera->reset(sceneMin, sceneMax, resetOrientation); |
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238 | |
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239 | def_eye = _camera->getPosition(); |
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240 | } |
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241 | |
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242 | /** \brief Load a 3D volume |
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243 | * |
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244 | * \param name Volume ID |
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245 | * \param width Number of samples in X direction |
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246 | * \param height Number of samples in Y direction |
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247 | * \param depth Number of samples in Z direction |
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248 | * \param numComponents the number of scalars for each space point. All component |
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249 | * scalars for a point are placed consequtively in data array |
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250 | * width, height and depth: number of points in each dimension |
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251 | * \param data Array of floats |
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252 | * \param vmin Min value of field |
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253 | * \param vmax Max value of field |
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254 | * \param nonZeroMin Minimum non-zero value of field |
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255 | * \param data pointer to an array of floats. |
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256 | */ |
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257 | Volume * |
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258 | NanoVis::loadVolume(const char *name, int width, int height, int depth, |
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259 | int numComponents, float *data, double vmin, double vmax, |
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260 | double nonZeroMin) |
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261 | { |
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262 | VolumeHashmap::iterator itr = volumeTable.find(name); |
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263 | if (itr != volumeTable.end()) { |
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264 | WARN("volume \"%s\" already exists", name); |
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265 | removeVolume(itr->second); |
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266 | } |
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267 | |
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268 | Volume *volume = new Volume(0.f, 0.f, 0.f, |
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269 | width, height, depth, |
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270 | numComponents, |
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271 | data, vmin, vmax, nonZeroMin); |
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272 | Volume::updatePending = true; |
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273 | volume->name(name); |
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274 | volumeTable[name] = volume; |
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275 | |
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276 | return volume; |
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277 | } |
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278 | |
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279 | // Gets a colormap 1D texture by name. |
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280 | TransferFunction * |
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281 | NanoVis::getTransferFunction(const TransferFunctionId& id) |
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282 | { |
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283 | TransferFunctionHashmap::iterator itr = tfTable.find(id); |
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284 | if (itr == tfTable.end()) { |
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285 | TRACE("No transfer function named \"%s\" found", id.c_str()); |
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286 | return NULL; |
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287 | } else { |
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288 | return itr->second; |
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289 | } |
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290 | } |
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291 | |
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292 | // Creates of updates a colormap 1D texture by name. |
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293 | TransferFunction * |
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294 | NanoVis::defineTransferFunction(const TransferFunctionId& id, |
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295 | size_t n, float *data) |
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296 | { |
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297 | TransferFunction *tf = getTransferFunction(id); |
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298 | if (tf == NULL) { |
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299 | TRACE("Creating new transfer function \"%s\"", id.c_str()); |
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300 | tf = new TransferFunction(id.c_str(), n, data); |
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301 | tfTable[id] = tf; |
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302 | } else { |
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303 | TRACE("Updating existing transfer function \"%s\"", id.c_str()); |
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304 | tf->update(n, data); |
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305 | } |
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306 | return tf; |
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307 | } |
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308 | |
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309 | int |
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310 | NanoVis::renderLegend(TransferFunction *tf, double min, double max, |
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311 | int width, int height, const char *volArg) |
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312 | { |
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313 | TRACE("Enter"); |
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314 | |
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315 | int old_width = winWidth; |
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316 | int old_height = winHeight; |
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317 | |
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318 | planeRenderer->setScreenSize(width, height); |
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319 | resizeOffscreenBuffer(width, height); |
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320 | |
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321 | // generate data for the legend |
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322 | float data[512]; |
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323 | for (int i=0; i < 256; i++) { |
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324 | data[i] = data[i+256] = (float)(i/255.0); |
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325 | } |
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326 | legendTexture = new Texture2D(256, 2, GL_FLOAT, GL_LINEAR, 1, data); |
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327 | int index = planeRenderer->addPlane(legendTexture, tf); |
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328 | planeRenderer->setActivePlane(index); |
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329 | |
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330 | bindOffscreenBuffer(); |
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331 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //clear screen |
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332 | planeRenderer->render(); |
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333 | |
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334 | //glPixelStorei(GL_PACK_ALIGNMENT, 1); |
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335 | glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, screenBuffer); |
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336 | { |
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337 | char prefix[200]; |
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338 | |
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339 | TRACE("Sending ppm legend image %s min:%g max:%g", volArg, min, max); |
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340 | sprintf(prefix, "nv>legend %s %g %g", volArg, min, max); |
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341 | ppmWrite(prefix); |
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342 | } |
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343 | planeRenderer->removePlane(index); |
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344 | resizeOffscreenBuffer(old_width, old_height); |
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345 | |
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346 | delete legendTexture; |
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347 | legendTexture = NULL; |
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348 | TRACE("Leave"); |
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349 | return TCL_OK; |
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350 | } |
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351 | |
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352 | //initialize frame buffer objects for offscreen rendering |
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353 | bool |
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354 | NanoVis::initOffscreenBuffer() |
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355 | { |
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356 | TRACE("Enter"); |
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357 | assert(_finalFbo == 0); |
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358 | // Initialize a fbo for final display. |
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359 | glGenFramebuffersEXT(1, &_finalFbo); |
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360 | |
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361 | glGenTextures(1, &_finalColorTex); |
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362 | glBindTexture(GL_TEXTURE_2D, _finalColorTex); |
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363 | |
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364 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
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365 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
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366 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); |
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367 | |
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368 | #if defined(HAVE_FLOAT_TEXTURES) && defined(USE_HALF_FLOAT) |
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369 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, winWidth, winHeight, 0, |
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370 | GL_RGB, GL_INT, NULL); |
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371 | #elif defined(HAVE_FLOAT_TEXTURES) |
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372 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, winWidth, winHeight, 0, |
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373 | GL_RGB, GL_INT, NULL); |
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374 | #else |
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375 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, winWidth, winHeight, 0, |
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376 | GL_RGB, GL_INT, NULL); |
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377 | #endif |
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378 | |
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379 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _finalFbo); |
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380 | glGenRenderbuffersEXT(1, &_finalDepthRb); |
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381 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb); |
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382 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, |
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383 | winWidth, winHeight); |
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384 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, |
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385 | GL_TEXTURE_2D, _finalColorTex, 0); |
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386 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, |
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387 | GL_RENDERBUFFER_EXT, _finalDepthRb); |
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388 | |
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389 | GLenum status; |
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390 | if (!CheckFBO(&status)) { |
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391 | PrintFBOStatus(status, "finalFbo"); |
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392 | return false; |
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393 | } |
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394 | |
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395 | TRACE("Leave"); |
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396 | return true; |
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397 | } |
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398 | |
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399 | //resize the offscreen buffer |
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400 | bool |
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401 | NanoVis::resizeOffscreenBuffer(int w, int h) |
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402 | { |
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403 | TRACE("Enter (%d, %d)", w, h); |
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404 | if ((w == winWidth) && (h == winHeight)) { |
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405 | return true; |
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406 | } |
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407 | winWidth = w; |
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408 | winHeight = h; |
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409 | |
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410 | if (fonts) { |
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411 | fonts->resize(w, h); |
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412 | } |
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413 | TRACE("screenBuffer size: %d %d", w, h); |
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414 | |
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415 | if (screenBuffer != NULL) { |
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416 | delete [] screenBuffer; |
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417 | screenBuffer = NULL; |
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418 | } |
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419 | |
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420 | screenBuffer = new unsigned char[4*winWidth*winHeight]; |
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421 | assert(screenBuffer != NULL); |
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422 | |
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423 | //delete the current render buffer resources |
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424 | glDeleteTextures(1, &_finalColorTex); |
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425 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb); |
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426 | glDeleteRenderbuffersEXT(1, &_finalDepthRb); |
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427 | |
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428 | TRACE("before deleteframebuffers"); |
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429 | glDeleteFramebuffersEXT(1, &_finalFbo); |
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430 | |
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431 | TRACE("reinitialize FBO"); |
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432 | //Reinitialize final fbo for final display |
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433 | glGenFramebuffersEXT(1, &_finalFbo); |
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434 | |
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435 | glGenTextures(1, &_finalColorTex); |
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436 | glBindTexture(GL_TEXTURE_2D, _finalColorTex); |
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437 | |
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438 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
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439 | glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
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440 | glTexEnvf(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_REPLACE); |
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441 | |
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442 | #if defined(HAVE_FLOAT_TEXTURES) && defined(USE_HALF_FLOAT) |
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443 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, winWidth, winHeight, 0, |
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444 | GL_RGB, GL_INT, NULL); |
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445 | #elif defined(HAVE_FLOAT_TEXTURES) |
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446 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, winWidth, winHeight, 0, |
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447 | GL_RGB, GL_INT, NULL); |
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448 | #else |
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449 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, winWidth, winHeight, 0, |
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450 | GL_RGB, GL_INT, NULL); |
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451 | #endif |
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452 | |
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453 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _finalFbo); |
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454 | glGenRenderbuffersEXT(1, &_finalDepthRb); |
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455 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb); |
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456 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, |
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457 | winWidth, winHeight); |
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458 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, |
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459 | GL_TEXTURE_2D, _finalColorTex, 0); |
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460 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, |
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461 | GL_RENDERBUFFER_EXT, _finalDepthRb); |
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462 | |
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463 | GLenum status; |
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464 | if (!CheckFBO(&status)) { |
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465 | PrintFBOStatus(status, "finalFbo"); |
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466 | return false; |
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467 | } |
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468 | |
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469 | TRACE("change camera"); |
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470 | //change the camera setting |
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471 | _camera->setViewport(0, 0, winWidth, winHeight); |
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472 | planeRenderer->setScreenSize(winWidth, winHeight); |
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473 | |
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474 | TRACE("Leave (%d, %d)", w, h); |
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475 | return true; |
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476 | } |
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477 | |
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478 | bool NanoVis::init(const char* path) |
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479 | { |
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480 | // print OpenGL driver information |
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481 | TRACE("-----------------------------------------------------------"); |
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482 | TRACE("OpenGL version: %s", glGetString(GL_VERSION)); |
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483 | TRACE("OpenGL vendor: %s", glGetString(GL_VENDOR)); |
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484 | TRACE("OpenGL renderer: %s", glGetString(GL_RENDERER)); |
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485 | TRACE("-----------------------------------------------------------"); |
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486 | |
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487 | if (path == NULL) { |
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488 | ERROR("No path defined for shaders or resources"); |
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489 | return false; |
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490 | } |
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491 | GLenum err = glewInit(); |
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492 | if (GLEW_OK != err) { |
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493 | ERROR("Can't init GLEW: %s", glewGetErrorString(err)); |
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494 | return false; |
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495 | } |
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496 | TRACE("Using GLEW %s", glewGetString(GLEW_VERSION)); |
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497 | |
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498 | // OpenGL 2.1 includes VBOs, PBOs, MRT, NPOT textures, point parameters, point sprites, |
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499 | // GLSL 1.2, and occlusion queries. |
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500 | if (!GLEW_VERSION_2_1) { |
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501 | ERROR("OpenGL version 2.1 or greater is required"); |
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502 | return false; |
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503 | } |
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504 | |
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505 | // NVIDIA driver may report OpenGL 2.1, but not support PBOs in |
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506 | // indirect GLX contexts |
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507 | if (!GLEW_ARB_pixel_buffer_object) { |
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508 | 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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509 | return false; |
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510 | } |
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511 | |
---|
512 | // Additional extensions not in 2.1 core |
---|
513 | |
---|
514 | // Framebuffer objects were promoted in 3.0 |
---|
515 | if (!GLEW_EXT_framebuffer_object) { |
---|
516 | ERROR("EXT_framebuffer_oject extension is required"); |
---|
517 | return false; |
---|
518 | } |
---|
519 | // Rectangle textures were promoted in 3.1 |
---|
520 | // FIXME: can use NPOT in place of rectangle textures |
---|
521 | if (!GLEW_ARB_texture_rectangle) { |
---|
522 | ERROR("ARB_texture_rectangle extension is required"); |
---|
523 | return false; |
---|
524 | } |
---|
525 | #ifdef HAVE_FLOAT_TEXTURES |
---|
526 | // Float color buffers and textures were promoted in 3.0 |
---|
527 | if (!GLEW_ARB_texture_float || |
---|
528 | !GLEW_ARB_color_buffer_float) { |
---|
529 | ERROR("ARB_texture_float and ARB_color_buffer_float extensions are required"); |
---|
530 | return false; |
---|
531 | } |
---|
532 | #endif |
---|
533 | // FIXME: should use ARB programs or (preferably) a GLSL profile for portability |
---|
534 | if (!GLEW_NV_vertex_program3 || |
---|
535 | !GLEW_NV_fragment_program2) { |
---|
536 | ERROR("NV_vertex_program3 and NV_fragment_program2 extensions are required"); |
---|
537 | return false; |
---|
538 | } |
---|
539 | |
---|
540 | if (!FilePath::getInstance()->setPath(path)) { |
---|
541 | ERROR("can't set file path to %s", path); |
---|
542 | return false; |
---|
543 | } |
---|
544 | |
---|
545 | ImageLoaderFactory::getInstance()->addLoaderImpl("bmp", new BMPImageLoaderImpl()); |
---|
546 | |
---|
547 | return true; |
---|
548 | } |
---|
549 | |
---|
550 | bool |
---|
551 | NanoVis::initGL() |
---|
552 | { |
---|
553 | TRACE("in initGL"); |
---|
554 | //buffer to store data read from the screen |
---|
555 | if (screenBuffer) { |
---|
556 | delete[] screenBuffer; |
---|
557 | screenBuffer = NULL; |
---|
558 | } |
---|
559 | screenBuffer = new unsigned char[4*winWidth*winHeight]; |
---|
560 | assert(screenBuffer != NULL); |
---|
561 | |
---|
562 | //create the camera with default setting |
---|
563 | _camera = new Camera(0, 0, winWidth, winHeight); |
---|
564 | _camera->setPosition(def_eye); |
---|
565 | |
---|
566 | glEnable(GL_TEXTURE_2D); |
---|
567 | glShadeModel(GL_FLAT); |
---|
568 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
---|
569 | glClearColor(0, 0, 0, 1); |
---|
570 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
---|
571 | |
---|
572 | //initialize lighting |
---|
573 | GLfloat mat_specular[] = {1.0, 1.0, 1.0, 1.0}; |
---|
574 | GLfloat mat_shininess[] = {30.0}; |
---|
575 | GLfloat white_light[] = {1.0, 1.0, 1.0, 1.0}; |
---|
576 | |
---|
577 | glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); |
---|
578 | glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess); |
---|
579 | glLightfv(GL_LIGHT0, GL_DIFFUSE, white_light); |
---|
580 | glLightfv(GL_LIGHT0, GL_SPECULAR, white_light); |
---|
581 | glLightfv(GL_LIGHT1, GL_DIFFUSE, white_light); |
---|
582 | glLightfv(GL_LIGHT1, GL_SPECULAR, white_light); |
---|
583 | |
---|
584 | //frame buffer object for offscreen rendering |
---|
585 | if (!initOffscreenBuffer()) { |
---|
586 | return false; |
---|
587 | } |
---|
588 | |
---|
589 | fonts = new Fonts(); |
---|
590 | fonts->addFont("verdana", "verdana.fnt"); |
---|
591 | fonts->setFont("verdana"); |
---|
592 | |
---|
593 | renderContext = new RenderContext(); |
---|
594 | |
---|
595 | volRenderer = new VolumeRenderer(); |
---|
596 | |
---|
597 | planeRenderer = new PlaneRenderer(winWidth, winHeight); |
---|
598 | |
---|
599 | velocityArrowsSlice = new VelocityArrowsSlice(); |
---|
600 | |
---|
601 | licRenderer = new LIC(); |
---|
602 | |
---|
603 | grid = new Grid(); |
---|
604 | grid->setFont(fonts); |
---|
605 | |
---|
606 | //assert(glGetError()==0); |
---|
607 | |
---|
608 | TRACE("leaving initGL"); |
---|
609 | |
---|
610 | return true; |
---|
611 | } |
---|
612 | |
---|
613 | // used internally to build up the BMP file header |
---|
614 | // Writes an integer value into the header data structure at pos |
---|
615 | static inline void |
---|
616 | bmpHeaderAddInt(unsigned char* header, int& pos, int data) |
---|
617 | { |
---|
618 | #ifdef WORDS_BIGENDIAN |
---|
619 | header[pos++] = (data >> 24) & 0xFF; |
---|
620 | header[pos++] = (data >> 16) & 0xFF; |
---|
621 | header[pos++] = (data >> 8) & 0xFF; |
---|
622 | header[pos++] = (data) & 0xFF; |
---|
623 | #else |
---|
624 | header[pos++] = data & 0xff; |
---|
625 | header[pos++] = (data >> 8) & 0xff; |
---|
626 | header[pos++] = (data >> 16) & 0xff; |
---|
627 | header[pos++] = (data >> 24) & 0xff; |
---|
628 | #endif |
---|
629 | } |
---|
630 | |
---|
631 | void |
---|
632 | NanoVis::bmpWriteToFile(int frame_number, const char *directory_name) |
---|
633 | { |
---|
634 | unsigned char header[SIZEOF_BMP_HEADER]; |
---|
635 | int pos = 0; |
---|
636 | header[pos++] = 'B'; |
---|
637 | header[pos++] = 'M'; |
---|
638 | |
---|
639 | // BE CAREFUL: BMP files must have an even multiple of 4 bytes |
---|
640 | // on each scan line. If need be, we add padding to each line. |
---|
641 | int pad = 0; |
---|
642 | if ((3*winWidth) % 4 > 0) { |
---|
643 | pad = 4 - ((3*winWidth) % 4); |
---|
644 | } |
---|
645 | |
---|
646 | // file size in bytes |
---|
647 | int fsize = (3*winWidth+pad)*winHeight + SIZEOF_BMP_HEADER; |
---|
648 | bmpHeaderAddInt(header, pos, fsize); |
---|
649 | |
---|
650 | // reserved value (must be 0) |
---|
651 | bmpHeaderAddInt(header, pos, 0); |
---|
652 | |
---|
653 | // offset in bytes to start of bitmap data |
---|
654 | bmpHeaderAddInt(header, pos, SIZEOF_BMP_HEADER); |
---|
655 | |
---|
656 | // size of the BITMAPINFOHEADER |
---|
657 | bmpHeaderAddInt(header, pos, 40); |
---|
658 | |
---|
659 | // width of the image in pixels |
---|
660 | bmpHeaderAddInt(header, pos, winWidth); |
---|
661 | |
---|
662 | // height of the image in pixels |
---|
663 | bmpHeaderAddInt(header, pos, winHeight); |
---|
664 | |
---|
665 | // 1 plane + (24 bits/pixel << 16) |
---|
666 | bmpHeaderAddInt(header, pos, 1572865); |
---|
667 | |
---|
668 | // no compression |
---|
669 | // size of image for compression |
---|
670 | bmpHeaderAddInt(header, pos, 0); |
---|
671 | bmpHeaderAddInt(header, pos, 0); |
---|
672 | |
---|
673 | // x pixels per meter |
---|
674 | // y pixels per meter |
---|
675 | bmpHeaderAddInt(header, pos, 0); |
---|
676 | bmpHeaderAddInt(header, pos, 0); |
---|
677 | |
---|
678 | // number of colors used (0 = compute from bits/pixel) |
---|
679 | // number of important colors (0 = all colors important) |
---|
680 | bmpHeaderAddInt(header, pos, 0); |
---|
681 | bmpHeaderAddInt(header, pos, 0); |
---|
682 | |
---|
683 | // BE CAREFUL: BMP format wants BGR ordering for screen data |
---|
684 | unsigned char* scr = screenBuffer; |
---|
685 | for (int row=0; row < winHeight; row++) { |
---|
686 | for (int col=0; col < winWidth; col++) { |
---|
687 | unsigned char tmp = scr[2]; |
---|
688 | scr[2] = scr[0]; // B |
---|
689 | scr[0] = tmp; // R |
---|
690 | scr += 3; |
---|
691 | } |
---|
692 | scr += pad; // skip over padding already in screen data |
---|
693 | } |
---|
694 | |
---|
695 | FILE* f; |
---|
696 | char filename[100]; |
---|
697 | if (frame_number >= 0) { |
---|
698 | if (directory_name) |
---|
699 | sprintf(filename, "%s/image%03d.bmp", directory_name, frame_number); |
---|
700 | else |
---|
701 | sprintf(filename, "/tmp/flow_animation/image%03d.bmp", frame_number); |
---|
702 | |
---|
703 | TRACE("Writing %s", filename); |
---|
704 | f = fopen(filename, "wb"); |
---|
705 | if (f == 0) { |
---|
706 | ERROR("cannot create file"); |
---|
707 | } |
---|
708 | } else { |
---|
709 | f = fopen("/tmp/image.bmp", "wb"); |
---|
710 | if (f == 0) { |
---|
711 | ERROR("cannot create file"); |
---|
712 | } |
---|
713 | } |
---|
714 | if (fwrite(header, SIZEOF_BMP_HEADER, 1, f) != 1) { |
---|
715 | ERROR("can't write header: short write"); |
---|
716 | } |
---|
717 | if (fwrite(screenBuffer, (3*winWidth+pad)*winHeight, 1, f) != 1) { |
---|
718 | ERROR("can't write data: short write"); |
---|
719 | } |
---|
720 | fclose(f); |
---|
721 | } |
---|
722 | |
---|
723 | void |
---|
724 | NanoVis::bmpWrite(const char *prefix) |
---|
725 | { |
---|
726 | unsigned char header[SIZEOF_BMP_HEADER]; |
---|
727 | ssize_t nWritten; |
---|
728 | int pos = 0; |
---|
729 | |
---|
730 | // BE CAREFUL: BMP files must have an even multiple of 4 bytes |
---|
731 | // on each scan line. If need be, we add padding to each line. |
---|
732 | int pad = 0; |
---|
733 | if ((3*winWidth) % 4 > 0) { |
---|
734 | pad = 4 - ((3*winWidth) % 4); |
---|
735 | } |
---|
736 | pad = 0; |
---|
737 | int fsize = (3*winWidth+pad)*winHeight + sizeof(header); |
---|
738 | |
---|
739 | char string[200]; |
---|
740 | sprintf(string, "%s %d\n", prefix, fsize); |
---|
741 | nWritten = write(g_fdOut, string, strlen(string)); |
---|
742 | assert(nWritten == (ssize_t)strlen(string)); |
---|
743 | header[pos++] = 'B'; |
---|
744 | header[pos++] = 'M'; |
---|
745 | |
---|
746 | // file size in bytes |
---|
747 | bmpHeaderAddInt(header, pos, fsize); |
---|
748 | |
---|
749 | // reserved value (must be 0) |
---|
750 | bmpHeaderAddInt(header, pos, 0); |
---|
751 | |
---|
752 | // offset in bytes to start of bitmap data |
---|
753 | bmpHeaderAddInt(header, pos, SIZEOF_BMP_HEADER); |
---|
754 | |
---|
755 | // size of the BITMAPINFOHEADER |
---|
756 | bmpHeaderAddInt(header, pos, 40); |
---|
757 | |
---|
758 | // width of the image in pixels |
---|
759 | bmpHeaderAddInt(header, pos, winWidth); |
---|
760 | |
---|
761 | // height of the image in pixels |
---|
762 | bmpHeaderAddInt(header, pos, winHeight); |
---|
763 | |
---|
764 | // 1 plane + (24 bits/pixel << 16) |
---|
765 | bmpHeaderAddInt(header, pos, 1572865); |
---|
766 | |
---|
767 | // no compression |
---|
768 | // size of image for compression |
---|
769 | bmpHeaderAddInt(header, pos, 0); |
---|
770 | bmpHeaderAddInt(header, pos, 0); |
---|
771 | |
---|
772 | // x pixels per meter |
---|
773 | // y pixels per meter |
---|
774 | bmpHeaderAddInt(header, pos, 0); |
---|
775 | bmpHeaderAddInt(header, pos, 0); |
---|
776 | |
---|
777 | // number of colors used (0 = compute from bits/pixel) |
---|
778 | // number of important colors (0 = all colors important) |
---|
779 | bmpHeaderAddInt(header, pos, 0); |
---|
780 | bmpHeaderAddInt(header, pos, 0); |
---|
781 | |
---|
782 | // BE CAREFUL: BMP format wants BGR ordering for screen data |
---|
783 | unsigned char* scr = screenBuffer; |
---|
784 | for (int row=0; row < winHeight; row++) { |
---|
785 | for (int col=0; col < winWidth; col++) { |
---|
786 | unsigned char tmp = scr[2]; |
---|
787 | scr[2] = scr[0]; // B |
---|
788 | scr[0] = tmp; // R |
---|
789 | scr += 3; |
---|
790 | } |
---|
791 | scr += pad; // skip over padding already in screen data |
---|
792 | } |
---|
793 | |
---|
794 | nWritten = write(g_fdOut, header, SIZEOF_BMP_HEADER); |
---|
795 | assert(nWritten == SIZEOF_BMP_HEADER); |
---|
796 | nWritten = write(g_fdOut, screenBuffer, (3*winWidth+pad)*winHeight); |
---|
797 | assert(nWritten == (3*winWidth+pad)*winHeight); |
---|
798 | g_stats.nFrames++; |
---|
799 | g_stats.nFrameBytes += (3*winWidth+pad)*winHeight; |
---|
800 | } |
---|
801 | |
---|
802 | /* |
---|
803 | * ppmWrite -- |
---|
804 | * |
---|
805 | * Writes the screen image as PPM binary data to the nanovisviewer |
---|
806 | * client. The PPM binary format is very simple. |
---|
807 | * |
---|
808 | * P6 w h 255\n |
---|
809 | * 3-byte RGB pixel data. |
---|
810 | * |
---|
811 | * The nanovisviewer client (using the TkImg library) will do less work |
---|
812 | * to unpack this format, as opposed to BMP or PNG. (This doesn't |
---|
813 | * eliminate the need to look into DXT compression performed on the GPU). |
---|
814 | * |
---|
815 | * Note that currently the image data from the screen is both row-padded |
---|
816 | * and the scan lines are reversed. This routine could be made even |
---|
817 | * simpler (faster) if the screen buffer is an array of packed 3-bytes |
---|
818 | * per pixels (no padding) and where the origin is the top-left corner. |
---|
819 | */ |
---|
820 | void |
---|
821 | NanoVis::ppmWrite(const char *prefix) |
---|
822 | { |
---|
823 | #define PPM_MAXVAL 255 |
---|
824 | char header[200]; |
---|
825 | |
---|
826 | TRACE("Enter (%dx%d)", winWidth, winHeight); |
---|
827 | // Generate the PPM binary file header |
---|
828 | sprintf(header, "P6 %d %d %d\n", winWidth, winHeight, PPM_MAXVAL); |
---|
829 | |
---|
830 | size_t header_length = strlen(header); |
---|
831 | size_t data_length = winWidth * winHeight * 3; |
---|
832 | |
---|
833 | char command[200]; |
---|
834 | sprintf(command, "%s %lu\n", prefix, |
---|
835 | (unsigned long)header_length + data_length); |
---|
836 | |
---|
837 | size_t wordsPerRow = (winWidth * 24 + 31) / 32; |
---|
838 | size_t bytesPerRow = wordsPerRow * 4; |
---|
839 | size_t rowLength = winWidth * 3; |
---|
840 | size_t nRecs = winHeight + 2; |
---|
841 | |
---|
842 | struct iovec *iov; |
---|
843 | iov = (struct iovec *)malloc(sizeof(struct iovec) * nRecs); |
---|
844 | |
---|
845 | // Write the nanovisviewer command, then the image header and data. |
---|
846 | // Command |
---|
847 | iov[0].iov_base = command; |
---|
848 | iov[0].iov_len = strlen(command); |
---|
849 | // Header of image data |
---|
850 | iov[1].iov_base = header; |
---|
851 | iov[1].iov_len = header_length; |
---|
852 | // Image data. |
---|
853 | int y; |
---|
854 | unsigned char *srcRowPtr = screenBuffer; |
---|
855 | for (y = winHeight + 1; y >= 2; y--) { |
---|
856 | iov[y].iov_base = srcRowPtr; |
---|
857 | iov[y].iov_len = rowLength; |
---|
858 | srcRowPtr += bytesPerRow; |
---|
859 | } |
---|
860 | if (writev(g_fdOut, iov, nRecs) < 0) { |
---|
861 | ERROR("write failed: %s", strerror(errno)); |
---|
862 | } |
---|
863 | free(iov); |
---|
864 | g_stats.nFrames++; |
---|
865 | g_stats.nFrameBytes += (bytesPerRow * winHeight); |
---|
866 | TRACE("Leave (%dx%d)", winWidth, winHeight); |
---|
867 | } |
---|
868 | |
---|
869 | void |
---|
870 | NanoVis::draw3dAxis() |
---|
871 | { |
---|
872 | if (!axisOn) |
---|
873 | return; |
---|
874 | |
---|
875 | glPushAttrib(GL_ENABLE_BIT); |
---|
876 | |
---|
877 | glDisable(GL_TEXTURE_2D); |
---|
878 | glEnable(GL_DEPTH_TEST); |
---|
879 | glEnable(GL_COLOR_MATERIAL); |
---|
880 | glDisable(GL_BLEND); |
---|
881 | |
---|
882 | //draw axes |
---|
883 | GLUquadric *obj; |
---|
884 | |
---|
885 | obj = gluNewQuadric(); |
---|
886 | |
---|
887 | int segments = 50; |
---|
888 | |
---|
889 | glColor3f(0.8, 0.8, 0.8); |
---|
890 | glPushMatrix(); |
---|
891 | glTranslatef(0.4, 0., 0.); |
---|
892 | glRotatef(90, 1, 0, 0); |
---|
893 | glRotatef(180, 0, 1, 0); |
---|
894 | glScalef(0.0005, 0.0005, 0.0005); |
---|
895 | glutStrokeCharacter(GLUT_STROKE_ROMAN, 'x'); |
---|
896 | glPopMatrix(); |
---|
897 | |
---|
898 | glPushMatrix(); |
---|
899 | glTranslatef(0., 0.4, 0.); |
---|
900 | glRotatef(90, 1, 0, 0); |
---|
901 | glRotatef(180, 0, 1, 0); |
---|
902 | glScalef(0.0005, 0.0005, 0.0005); |
---|
903 | glutStrokeCharacter(GLUT_STROKE_ROMAN, 'y'); |
---|
904 | glPopMatrix(); |
---|
905 | |
---|
906 | glPushMatrix(); |
---|
907 | glTranslatef(0., 0., 0.4); |
---|
908 | glRotatef(90, 1, 0, 0); |
---|
909 | glRotatef(180, 0, 1, 0); |
---|
910 | glScalef(0.0005, 0.0005, 0.0005); |
---|
911 | glutStrokeCharacter(GLUT_STROKE_ROMAN, 'z'); |
---|
912 | glPopMatrix(); |
---|
913 | |
---|
914 | glEnable(GL_LIGHTING); |
---|
915 | glEnable(GL_LIGHT0); |
---|
916 | |
---|
917 | //glColor3f(0.2, 0.2, 0.8); |
---|
918 | glPushMatrix(); |
---|
919 | glutSolidSphere(0.02, segments, segments ); |
---|
920 | glPopMatrix(); |
---|
921 | |
---|
922 | glPushMatrix(); |
---|
923 | glRotatef(-90, 1, 0, 0); |
---|
924 | gluCylinder(obj, 0.01, 0.01, 0.3, segments, segments); |
---|
925 | glPopMatrix(); |
---|
926 | |
---|
927 | glPushMatrix(); |
---|
928 | glTranslatef(0., 0.3, 0.); |
---|
929 | glRotatef(-90, 1, 0, 0); |
---|
930 | gluCylinder(obj, 0.02, 0.0, 0.06, segments, segments); |
---|
931 | glPopMatrix(); |
---|
932 | |
---|
933 | glPushMatrix(); |
---|
934 | glRotatef(90, 0, 1, 0); |
---|
935 | gluCylinder(obj, 0.01, 0.01, 0.3, segments, segments); |
---|
936 | glPopMatrix(); |
---|
937 | |
---|
938 | glPushMatrix(); |
---|
939 | glTranslatef(0.3, 0., 0.); |
---|
940 | glRotatef(90, 0, 1, 0); |
---|
941 | gluCylinder(obj, 0.02, 0.0, 0.06, segments, segments); |
---|
942 | glPopMatrix(); |
---|
943 | |
---|
944 | glPushMatrix(); |
---|
945 | gluCylinder(obj, 0.01, 0.01, 0.3, segments, segments); |
---|
946 | glPopMatrix(); |
---|
947 | |
---|
948 | glPushMatrix(); |
---|
949 | glTranslatef(0., 0., 0.3); |
---|
950 | gluCylinder(obj, 0.02, 0.0, 0.06, segments, segments); |
---|
951 | glPopMatrix(); |
---|
952 | |
---|
953 | gluDeleteQuadric(obj); |
---|
954 | |
---|
955 | glPopAttrib(); |
---|
956 | } |
---|
957 | |
---|
958 | void NanoVis::update() |
---|
959 | { |
---|
960 | VolumeInterpolator *volInterp = volRenderer->getVolumeInterpolator(); |
---|
961 | if (volInterp->isStarted()) { |
---|
962 | struct timeval clock; |
---|
963 | gettimeofday(&clock, NULL); |
---|
964 | double elapsed_time; |
---|
965 | |
---|
966 | elapsed_time = clock.tv_sec + clock.tv_usec/1000000.0 - |
---|
967 | volInterp->getStartTime(); |
---|
968 | |
---|
969 | TRACE("%lf %lf", elapsed_time, |
---|
970 | volInterp->getInterval()); |
---|
971 | float fraction; |
---|
972 | float f; |
---|
973 | |
---|
974 | f = fmod((float) elapsed_time, (float)volInterp->getInterval()); |
---|
975 | if (f == 0.0) { |
---|
976 | fraction = 0.0f; |
---|
977 | } else { |
---|
978 | fraction = f / volInterp->getInterval(); |
---|
979 | } |
---|
980 | TRACE("fraction : %f", fraction); |
---|
981 | volInterp->update(fraction); |
---|
982 | } |
---|
983 | } |
---|
984 | |
---|
985 | void |
---|
986 | NanoVis::setVolumeRanges() |
---|
987 | { |
---|
988 | double xMin, xMax, yMin, yMax, zMin, zMax, wMin, wMax; |
---|
989 | |
---|
990 | TRACE("Enter"); |
---|
991 | xMin = yMin = zMin = wMin = DBL_MAX; |
---|
992 | xMax = yMax = zMax = wMax = -DBL_MAX; |
---|
993 | VolumeHashmap::iterator itr; |
---|
994 | for (itr = volumeTable.begin(); |
---|
995 | itr != volumeTable.end(); ++itr) { |
---|
996 | Volume *volume = itr->second; |
---|
997 | if (xMin > volume->xAxis.min()) { |
---|
998 | xMin = volume->xAxis.min(); |
---|
999 | } |
---|
1000 | if (xMax < volume->xAxis.max()) { |
---|
1001 | xMax = volume->xAxis.max(); |
---|
1002 | } |
---|
1003 | if (yMin > volume->yAxis.min()) { |
---|
1004 | yMin = volume->yAxis.min(); |
---|
1005 | } |
---|
1006 | if (yMax < volume->yAxis.max()) { |
---|
1007 | yMax = volume->yAxis.max(); |
---|
1008 | } |
---|
1009 | if (zMin > volume->zAxis.min()) { |
---|
1010 | zMin = volume->zAxis.min(); |
---|
1011 | } |
---|
1012 | if (zMax < volume->zAxis.max()) { |
---|
1013 | zMax = volume->zAxis.max(); |
---|
1014 | } |
---|
1015 | if (wMin > volume->wAxis.min()) { |
---|
1016 | wMin = volume->wAxis.min(); |
---|
1017 | } |
---|
1018 | if (wMax < volume->wAxis.max()) { |
---|
1019 | wMax = volume->wAxis.max(); |
---|
1020 | } |
---|
1021 | } |
---|
1022 | if ((xMin < DBL_MAX) && (xMax > -DBL_MAX)) { |
---|
1023 | grid->xAxis.setScale(xMin, xMax); |
---|
1024 | } |
---|
1025 | if ((yMin < DBL_MAX) && (yMax > -DBL_MAX)) { |
---|
1026 | grid->yAxis.setScale(yMin, yMax); |
---|
1027 | } |
---|
1028 | if ((zMin < DBL_MAX) && (zMax > -DBL_MAX)) { |
---|
1029 | grid->zAxis.setScale(zMin, zMax); |
---|
1030 | } |
---|
1031 | if ((wMin < DBL_MAX) && (wMax > -DBL_MAX)) { |
---|
1032 | Volume::valueMin = wMin; |
---|
1033 | Volume::valueMax = wMax; |
---|
1034 | } |
---|
1035 | Volume::updatePending = false; |
---|
1036 | TRACE("Leave"); |
---|
1037 | } |
---|
1038 | |
---|
1039 | void |
---|
1040 | NanoVis::setHeightmapRanges() |
---|
1041 | { |
---|
1042 | double xMin, xMax, yMin, yMax, zMin, zMax, wMin, wMax; |
---|
1043 | |
---|
1044 | TRACE("Enter"); |
---|
1045 | xMin = yMin = zMin = wMin = DBL_MAX; |
---|
1046 | xMax = yMax = zMax = wMax = -DBL_MAX; |
---|
1047 | HeightMapHashmap::iterator itr; |
---|
1048 | for (itr = heightMapTable.begin(); |
---|
1049 | itr != heightMapTable.end(); ++itr) { |
---|
1050 | HeightMap *heightMap = itr->second; |
---|
1051 | if (xMin > heightMap->xAxis.min()) { |
---|
1052 | xMin = heightMap->xAxis.min(); |
---|
1053 | } |
---|
1054 | if (xMax < heightMap->xAxis.max()) { |
---|
1055 | xMax = heightMap->xAxis.max(); |
---|
1056 | } |
---|
1057 | if (yMin > heightMap->yAxis.min()) { |
---|
1058 | yMin = heightMap->yAxis.min(); |
---|
1059 | } |
---|
1060 | if (yMax < heightMap->yAxis.max()) { |
---|
1061 | yMax = heightMap->yAxis.max(); |
---|
1062 | } |
---|
1063 | if (zMin > heightMap->zAxis.min()) { |
---|
1064 | zMin = heightMap->zAxis.min(); |
---|
1065 | } |
---|
1066 | if (zMax < heightMap->zAxis.max()) { |
---|
1067 | zMax = heightMap->zAxis.max(); |
---|
1068 | } |
---|
1069 | if (wMin > heightMap->wAxis.min()) { |
---|
1070 | wMin = heightMap->wAxis.min(); |
---|
1071 | } |
---|
1072 | if (wMax < heightMap->wAxis.max()) { |
---|
1073 | wMax = heightMap->wAxis.max(); |
---|
1074 | } |
---|
1075 | } |
---|
1076 | if ((xMin < DBL_MAX) && (xMax > -DBL_MAX)) { |
---|
1077 | grid->xAxis.setScale(xMin, xMax); |
---|
1078 | } |
---|
1079 | if ((yMin < DBL_MAX) && (yMax > -DBL_MAX)) { |
---|
1080 | grid->yAxis.setScale(yMin, yMax); |
---|
1081 | } |
---|
1082 | if ((zMin < DBL_MAX) && (zMax > -DBL_MAX)) { |
---|
1083 | grid->zAxis.setScale(zMin, zMax); |
---|
1084 | } |
---|
1085 | if ((wMin < DBL_MAX) && (wMax > -DBL_MAX)) { |
---|
1086 | HeightMap::valueMin = grid->yAxis.min(); |
---|
1087 | HeightMap::valueMax = grid->yAxis.max(); |
---|
1088 | } |
---|
1089 | for (HeightMapHashmap::iterator itr = heightMapTable.begin(); |
---|
1090 | itr != heightMapTable.end(); ++itr) { |
---|
1091 | itr->second->mapToGrid(grid); |
---|
1092 | } |
---|
1093 | HeightMap::updatePending = false; |
---|
1094 | TRACE("Leave"); |
---|
1095 | } |
---|
1096 | |
---|
1097 | void |
---|
1098 | NanoVis::collectBounds(bool onlyVisible) |
---|
1099 | { |
---|
1100 | if (Flow::updatePending) { |
---|
1101 | setFlowRanges(); |
---|
1102 | grid->xAxis.setScale(xMin, xMax); |
---|
1103 | grid->yAxis.setScale(yMin, yMax); |
---|
1104 | grid->zAxis.setScale(zMin, zMax); |
---|
1105 | } |
---|
1106 | |
---|
1107 | sceneMin.set(FLT_MAX, FLT_MAX, FLT_MAX); |
---|
1108 | sceneMax.set(-FLT_MAX, -FLT_MAX, -FLT_MAX); |
---|
1109 | |
---|
1110 | for (VolumeHashmap::iterator itr = volumeTable.begin(); |
---|
1111 | itr != volumeTable.end(); ++itr) { |
---|
1112 | Volume *volume = itr->second; |
---|
1113 | |
---|
1114 | if (onlyVisible && !volume->visible()) |
---|
1115 | continue; |
---|
1116 | |
---|
1117 | Vector3f bmin, bmax; |
---|
1118 | volume->getWorldSpaceBounds(bmin, bmax); |
---|
1119 | if (bmin.x > bmax.x) |
---|
1120 | continue; |
---|
1121 | |
---|
1122 | if (sceneMin.x > bmin.x) { |
---|
1123 | sceneMin.x = bmin.x; |
---|
1124 | } |
---|
1125 | if (sceneMax.x < bmax.x) { |
---|
1126 | sceneMax.x = bmax.x; |
---|
1127 | } |
---|
1128 | if (sceneMin.y > bmin.y) { |
---|
1129 | sceneMin.y = bmin.y; |
---|
1130 | } |
---|
1131 | if (sceneMax.y < bmax.y) { |
---|
1132 | sceneMax.y = bmax.y; |
---|
1133 | } |
---|
1134 | if (sceneMin.z > bmin.z) { |
---|
1135 | sceneMin.z = bmin.z; |
---|
1136 | } |
---|
1137 | if (sceneMax.z < bmax.z) { |
---|
1138 | sceneMax.z = bmax.z; |
---|
1139 | } |
---|
1140 | } |
---|
1141 | |
---|
1142 | for (HeightMapHashmap::iterator itr = heightMapTable.begin(); |
---|
1143 | itr != heightMapTable.end(); ++itr) { |
---|
1144 | HeightMap *heightMap = itr->second; |
---|
1145 | |
---|
1146 | if (onlyVisible && !heightMap->isVisible()) |
---|
1147 | continue; |
---|
1148 | |
---|
1149 | Vector3f bmin, bmax; |
---|
1150 | heightMap->getWorldSpaceBounds(bmin, bmax); |
---|
1151 | if (bmin.x > bmax.x) |
---|
1152 | continue; |
---|
1153 | |
---|
1154 | if (sceneMin.x > bmin.x) { |
---|
1155 | sceneMin.x = bmin.x; |
---|
1156 | } |
---|
1157 | if (sceneMax.x < bmax.x) { |
---|
1158 | sceneMax.x = bmax.x; |
---|
1159 | } |
---|
1160 | if (sceneMin.y > bmin.y) { |
---|
1161 | sceneMin.y = bmin.y; |
---|
1162 | } |
---|
1163 | if (sceneMax.y < bmax.y) { |
---|
1164 | sceneMax.y = bmax.y; |
---|
1165 | } |
---|
1166 | if (sceneMin.z > bmin.z) { |
---|
1167 | sceneMin.z = bmin.z; |
---|
1168 | } |
---|
1169 | if (sceneMax.z < bmax.z) { |
---|
1170 | sceneMax.z = bmax.z; |
---|
1171 | } |
---|
1172 | } |
---|
1173 | |
---|
1174 | Vector3f flowMin, flowMax; |
---|
1175 | getFlowBounds(flowMin, flowMax, onlyVisible); |
---|
1176 | if (flowMin.x < flowMax.x) { |
---|
1177 | if (sceneMin.x > flowMin.x) { |
---|
1178 | sceneMin.x = flowMin.x; |
---|
1179 | } |
---|
1180 | if (sceneMax.x < flowMax.x) { |
---|
1181 | sceneMax.x = flowMax.x; |
---|
1182 | } |
---|
1183 | if (sceneMin.y > flowMin.y) { |
---|
1184 | sceneMin.y = flowMin.y; |
---|
1185 | } |
---|
1186 | if (sceneMax.y < flowMax.y) { |
---|
1187 | sceneMax.y = flowMax.y; |
---|
1188 | } |
---|
1189 | if (sceneMin.z > flowMin.z) { |
---|
1190 | sceneMin.z = flowMin.z; |
---|
1191 | } |
---|
1192 | if (sceneMax.z < flowMax.z) { |
---|
1193 | sceneMax.z = flowMax.z; |
---|
1194 | } |
---|
1195 | } |
---|
1196 | |
---|
1197 | // TODO: Get Grid bounds |
---|
1198 | |
---|
1199 | if (sceneMin.x > sceneMax.x) { |
---|
1200 | sceneMin.set(-0.5, -0.5, -0.5); |
---|
1201 | sceneMax.set( 0.5, 0.5, 0.5); |
---|
1202 | } |
---|
1203 | |
---|
1204 | TRACE("Scene bounds: (%g,%g,%g) - (%g,%g,%g)", |
---|
1205 | sceneMin.x, sceneMin.y, sceneMin.z, |
---|
1206 | sceneMax.x, sceneMax.y, sceneMax.z); |
---|
1207 | } |
---|
1208 | |
---|
1209 | void |
---|
1210 | NanoVis::setBgColor(float color[3]) |
---|
1211 | { |
---|
1212 | TRACE("Setting bgcolor to %g %g %g", color[0], color[1], color[2]); |
---|
1213 | glClearColor(color[0], color[1], color[2], 1); |
---|
1214 | } |
---|
1215 | |
---|
1216 | void |
---|
1217 | NanoVis::removeVolume(Volume *volume) |
---|
1218 | { |
---|
1219 | VolumeHashmap::iterator itr = volumeTable.find(volume->name()); |
---|
1220 | if (itr != volumeTable.end()) { |
---|
1221 | volumeTable.erase(itr); |
---|
1222 | } |
---|
1223 | delete volume; |
---|
1224 | } |
---|
1225 | |
---|
1226 | Flow * |
---|
1227 | NanoVis::getFlow(const char *name) |
---|
1228 | { |
---|
1229 | FlowHashmap::iterator itr = flowTable.find(name); |
---|
1230 | if (itr == flowTable.end()) { |
---|
1231 | TRACE("Can't find flow '%s'", name); |
---|
1232 | return NULL; |
---|
1233 | } |
---|
1234 | return itr->second; |
---|
1235 | } |
---|
1236 | |
---|
1237 | Flow * |
---|
1238 | NanoVis::createFlow(Tcl_Interp *interp, const char *name) |
---|
1239 | { |
---|
1240 | FlowHashmap::iterator itr = flowTable.find(name); |
---|
1241 | if (itr != flowTable.end()) { |
---|
1242 | ERROR("Flow '%s' already exists", name); |
---|
1243 | return NULL; |
---|
1244 | } |
---|
1245 | Flow *flow = new Flow(interp, name); |
---|
1246 | flowTable[name] = flow; |
---|
1247 | return flow; |
---|
1248 | } |
---|
1249 | |
---|
1250 | /** |
---|
1251 | * \brief Delete flow object and hash table entry |
---|
1252 | * |
---|
1253 | * This is called by the flow command instance delete callback |
---|
1254 | */ |
---|
1255 | void |
---|
1256 | NanoVis::deleteFlow(const char *name) |
---|
1257 | { |
---|
1258 | FlowHashmap::iterator itr = flowTable.find(name); |
---|
1259 | if (itr != flowTable.end()) { |
---|
1260 | delete itr->second; |
---|
1261 | flowTable.erase(itr); |
---|
1262 | } |
---|
1263 | } |
---|
1264 | |
---|
1265 | /** |
---|
1266 | * \brief Delete all flow object commands |
---|
1267 | * |
---|
1268 | * This will also delete the flow objects and hash table entries |
---|
1269 | */ |
---|
1270 | void |
---|
1271 | NanoVis::deleteFlows(Tcl_Interp *interp) |
---|
1272 | { |
---|
1273 | FlowHashmap::iterator itr; |
---|
1274 | for (itr = flowTable.begin(); |
---|
1275 | itr != flowTable.end(); ++itr) { |
---|
1276 | Tcl_DeleteCommandFromToken(interp, itr->second->getCommandToken()); |
---|
1277 | } |
---|
1278 | flowTable.clear(); |
---|
1279 | } |
---|
1280 | |
---|
1281 | bool |
---|
1282 | NanoVis::setFlowRanges() |
---|
1283 | { |
---|
1284 | TRACE("Enter"); |
---|
1285 | |
---|
1286 | /* |
---|
1287 | * Step 1. Get the overall min and max magnitudes of all the |
---|
1288 | * flow vectors. |
---|
1289 | */ |
---|
1290 | magMin = DBL_MAX; |
---|
1291 | magMax = -DBL_MAX; |
---|
1292 | |
---|
1293 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
1294 | itr != flowTable.end(); ++itr) { |
---|
1295 | Flow *flow = itr->second; |
---|
1296 | double min, max; |
---|
1297 | if (!flow->isDataLoaded()) { |
---|
1298 | continue; |
---|
1299 | } |
---|
1300 | Unirect3d *data = flow->data(); |
---|
1301 | min = data->magMin(); |
---|
1302 | max = data->magMax(); |
---|
1303 | if (min < magMin) { |
---|
1304 | magMin = min; |
---|
1305 | } |
---|
1306 | if (max > magMax) { |
---|
1307 | magMax = max; |
---|
1308 | } |
---|
1309 | if (data->xMin() < xMin) { |
---|
1310 | xMin = data->xMin(); |
---|
1311 | } |
---|
1312 | if (data->yMin() < yMin) { |
---|
1313 | yMin = data->yMin(); |
---|
1314 | } |
---|
1315 | if (data->zMin() < zMin) { |
---|
1316 | zMin = data->zMin(); |
---|
1317 | } |
---|
1318 | if (data->xMax() > xMax) { |
---|
1319 | xMax = data->xMax(); |
---|
1320 | } |
---|
1321 | if (data->yMax() > yMax) { |
---|
1322 | yMax = data->yMax(); |
---|
1323 | } |
---|
1324 | if (data->zMax() > zMax) { |
---|
1325 | zMax = data->zMax(); |
---|
1326 | } |
---|
1327 | } |
---|
1328 | |
---|
1329 | TRACE("magMin=%g magMax=%g", NanoVis::magMin, NanoVis::magMax); |
---|
1330 | |
---|
1331 | /* |
---|
1332 | * Step 2. Generate the vector field from each data set. |
---|
1333 | */ |
---|
1334 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
1335 | itr != flowTable.end(); ++itr) { |
---|
1336 | Flow *flow = itr->second; |
---|
1337 | if (!flow->isDataLoaded()) { |
---|
1338 | continue; // Flow exists, but no data has been loaded yet. |
---|
1339 | } |
---|
1340 | if (flow->visible()) { |
---|
1341 | flow->initializeParticles(); |
---|
1342 | } |
---|
1343 | if (!flow->scaleVectorField()) { |
---|
1344 | return false; |
---|
1345 | } |
---|
1346 | // FIXME: This doesn't work when there is more than one flow. |
---|
1347 | licRenderer->setSlicePosition(flow->getRelativePosition()); |
---|
1348 | velocityArrowsSlice->setSlicePosition(flow->getRelativePosition()); |
---|
1349 | } |
---|
1350 | advectFlows(); |
---|
1351 | |
---|
1352 | Flow::updatePending = false; |
---|
1353 | return true; |
---|
1354 | } |
---|
1355 | |
---|
1356 | void |
---|
1357 | NanoVis::getFlowBounds(Vector3f& min, |
---|
1358 | Vector3f& max, |
---|
1359 | bool onlyVisible) |
---|
1360 | { |
---|
1361 | TRACE("Enter"); |
---|
1362 | |
---|
1363 | min.set(FLT_MAX, FLT_MAX, FLT_MAX); |
---|
1364 | max.set(-FLT_MAX, -FLT_MAX, -FLT_MAX); |
---|
1365 | |
---|
1366 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
1367 | itr != flowTable.end(); ++itr) { |
---|
1368 | itr->second->getBounds(min, max, onlyVisible); |
---|
1369 | } |
---|
1370 | } |
---|
1371 | |
---|
1372 | void |
---|
1373 | NanoVis::renderFlows() |
---|
1374 | { |
---|
1375 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
1376 | itr != flowTable.end(); ++itr) { |
---|
1377 | Flow *flow = itr->second; |
---|
1378 | if (flow->isDataLoaded() && flow->visible()) { |
---|
1379 | flow->render(); |
---|
1380 | } |
---|
1381 | } |
---|
1382 | } |
---|
1383 | |
---|
1384 | void |
---|
1385 | NanoVis::resetFlows() |
---|
1386 | { |
---|
1387 | NanoVis::licRenderer->reset(); |
---|
1388 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
1389 | itr != flowTable.end(); ++itr) { |
---|
1390 | Flow *flow = itr->second; |
---|
1391 | if (flow->isDataLoaded()) { |
---|
1392 | flow->resetParticles(); |
---|
1393 | } |
---|
1394 | } |
---|
1395 | } |
---|
1396 | |
---|
1397 | void |
---|
1398 | NanoVis::advectFlows() |
---|
1399 | { |
---|
1400 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
1401 | itr != flowTable.end(); ++itr) { |
---|
1402 | Flow *flow = itr->second; |
---|
1403 | if (flow->isDataLoaded()) { |
---|
1404 | flow->advect(); |
---|
1405 | } |
---|
1406 | } |
---|
1407 | } |
---|
1408 | |
---|
1409 | void |
---|
1410 | NanoVis::render() |
---|
1411 | { |
---|
1412 | TRACE("Enter"); |
---|
1413 | |
---|
1414 | if (Flow::updatePending) { |
---|
1415 | setFlowRanges(); |
---|
1416 | grid->xAxis.setScale(xMin, xMax); |
---|
1417 | grid->yAxis.setScale(yMin, yMax); |
---|
1418 | grid->zAxis.setScale(zMin, zMax); |
---|
1419 | } |
---|
1420 | if (HeightMap::updatePending) { |
---|
1421 | setHeightmapRanges(); |
---|
1422 | } |
---|
1423 | if (Volume::updatePending) { |
---|
1424 | setVolumeRanges(); |
---|
1425 | } |
---|
1426 | |
---|
1427 | // Start final rendering |
---|
1428 | |
---|
1429 | // Need to reset fbo since it may have been changed to default (0) |
---|
1430 | bindOffscreenBuffer(); |
---|
1431 | |
---|
1432 | // Clear screen |
---|
1433 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
---|
1434 | |
---|
1435 | glEnable(GL_DEPTH_TEST); |
---|
1436 | glEnable(GL_COLOR_MATERIAL); |
---|
1437 | |
---|
1438 | // Emit modelview and projection matrices |
---|
1439 | _camera->initialize(); |
---|
1440 | |
---|
1441 | // Rotate for updir if required |
---|
1442 | glPushMatrix(); |
---|
1443 | |
---|
1444 | switch (_camera->getUpdir()) { |
---|
1445 | case Camera::X_POS: |
---|
1446 | glRotatef(90, 0, 0, 1); |
---|
1447 | glRotatef(90, 1, 0, 0); |
---|
1448 | break; |
---|
1449 | case Camera::Y_POS: |
---|
1450 | // this is the default |
---|
1451 | break; |
---|
1452 | case Camera::Z_POS: |
---|
1453 | glRotatef(-90, 1, 0, 0); |
---|
1454 | glRotatef(-90, 0, 0, 1); |
---|
1455 | break; |
---|
1456 | case Camera::X_NEG: |
---|
1457 | glRotatef(-90, 0, 0, 1); |
---|
1458 | break; |
---|
1459 | case Camera::Y_NEG: |
---|
1460 | glRotatef(180, 0, 0, 1); |
---|
1461 | glRotatef(-90, 0, 1, 0); |
---|
1462 | break; |
---|
1463 | case Camera::Z_NEG: |
---|
1464 | glRotatef(90, 1, 0, 0); |
---|
1465 | break; |
---|
1466 | } |
---|
1467 | |
---|
1468 | // Now render things in the scene |
---|
1469 | |
---|
1470 | draw3dAxis(); |
---|
1471 | |
---|
1472 | grid->render(); |
---|
1473 | |
---|
1474 | licRenderer->render(); |
---|
1475 | |
---|
1476 | velocityArrowsSlice->render(); |
---|
1477 | |
---|
1478 | renderFlows(); |
---|
1479 | |
---|
1480 | volRenderer->renderAll(); |
---|
1481 | |
---|
1482 | for (HeightMapHashmap::iterator itr = heightMapTable.begin(); |
---|
1483 | itr != heightMapTable.end(); ++itr) { |
---|
1484 | itr->second->render(renderContext); |
---|
1485 | } |
---|
1486 | glPopMatrix(); |
---|
1487 | |
---|
1488 | CHECK_FRAMEBUFFER_STATUS(); |
---|
1489 | TRACE("Leave"); |
---|
1490 | redrawPending = false; |
---|
1491 | } |
---|