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 | #include <cmath> // for fmod() |
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22 | |
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23 | #include <GL/glew.h> |
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24 | #include <GL/glut.h> |
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25 | |
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26 | #include <graphics/RenderContext.h> |
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27 | #include <vrmath/BBox.h> |
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28 | #include <vrmath/Vector3f.h> |
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29 | |
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30 | #include <util/FilePath.h> |
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31 | #include <util/Fonts.h> |
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32 | |
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33 | #include <BMPImageLoaderImpl.h> |
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34 | #include <ImageLoaderFactory.h> |
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35 | |
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36 | #include "config.h" |
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37 | #include "nanovis.h" |
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38 | #include "nanovisServer.h" |
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39 | #include "define.h" |
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40 | |
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41 | #include "Flow.h" |
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42 | #include "Grid.h" |
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43 | #include "HeightMap.h" |
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44 | #include "Camera.h" |
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45 | #include "LIC.h" |
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46 | #include "Shader.h" |
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47 | #include "OrientationIndicator.h" |
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48 | #include "PlaneRenderer.h" |
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49 | #include "PPMWriter.h" |
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50 | #include "Texture2D.h" |
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51 | #include "Trace.h" |
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52 | #include "TransferFunction.h" |
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53 | #include "Unirect.h" |
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54 | #include "VelocityArrowsSlice.h" |
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55 | #include "Volume.h" |
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56 | #include "VolumeInterpolator.h" |
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57 | #include "VolumeRenderer.h" |
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58 | |
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59 | using namespace nv; |
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60 | using namespace nv::graphics; |
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61 | using namespace nv::util; |
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62 | using namespace vrmath; |
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63 | |
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64 | // STATIC MEMBER DATA |
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65 | |
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66 | Tcl_Interp *NanoVis::interp = NULL; |
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67 | |
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68 | bool NanoVis::redrawPending = false; |
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69 | bool NanoVis::debugFlag = false; |
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70 | |
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71 | int NanoVis::winWidth = NPIX; |
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72 | int NanoVis::winHeight = NPIX; |
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73 | int NanoVis::renderWindow = 0; |
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74 | unsigned char *NanoVis::screenBuffer = NULL; |
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75 | Texture2D *NanoVis::legendTexture = NULL; |
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76 | Fonts *NanoVis::fonts; |
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77 | Camera *NanoVis::_camera = NULL; |
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78 | RenderContext *NanoVis::renderContext = NULL; |
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79 | |
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80 | NanoVis::TransferFunctionHashmap NanoVis::tfTable; |
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81 | NanoVis::VolumeHashmap NanoVis::volumeTable; |
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82 | NanoVis::FlowHashmap NanoVis::flowTable; |
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83 | NanoVis::HeightMapHashmap NanoVis::heightMapTable; |
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84 | |
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85 | float NanoVis::xMin = FLT_MAX; |
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86 | float NanoVis::xMax = -FLT_MAX; |
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87 | float NanoVis::yMin = FLT_MAX; |
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88 | float NanoVis::yMax = -FLT_MAX; |
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89 | float NanoVis::zMin = FLT_MAX; |
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90 | float NanoVis::zMax = -FLT_MAX; |
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91 | BBox NanoVis::sceneBounds; |
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92 | |
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93 | VolumeRenderer *NanoVis::volRenderer = NULL; |
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94 | VelocityArrowsSlice *NanoVis::velocityArrowsSlice = NULL; |
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95 | LIC *NanoVis::licRenderer = NULL; |
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96 | PlaneRenderer *NanoVis::planeRenderer = NULL; |
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97 | OrientationIndicator *NanoVis::orientationIndicator = NULL; |
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98 | Grid *NanoVis::grid = NULL; |
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99 | |
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100 | //frame buffer for final rendering |
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101 | GLuint NanoVis::_finalFbo = 0; |
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102 | GLuint NanoVis::_finalColorTex = 0; |
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103 | GLuint NanoVis::_finalDepthRb = 0; |
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104 | |
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105 | // Default camera location. |
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106 | Vector3f def_eye(0.0f, 0.0f, 2.5f); |
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107 | |
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108 | void |
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109 | NanoVis::removeAllData() |
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110 | { |
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111 | TRACE("Enter"); |
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112 | |
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113 | if (grid != NULL) { |
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114 | TRACE("Deleting grid"); |
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115 | delete grid; |
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116 | } |
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117 | if (_camera != NULL) { |
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118 | TRACE("Deleting camera"); |
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119 | delete _camera; |
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120 | } |
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121 | if (volRenderer != NULL) { |
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122 | TRACE("Deleting volRenderer"); |
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123 | delete volRenderer; |
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124 | } |
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125 | if (planeRenderer != NULL) { |
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126 | TRACE("Deleting planeRenderer"); |
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127 | delete planeRenderer; |
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128 | } |
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129 | if (legendTexture != NULL) { |
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130 | TRACE("Deleting legendTexture"); |
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131 | delete legendTexture; |
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132 | } |
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133 | TRACE("Deleting flows"); |
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134 | deleteFlows(interp); |
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135 | if (licRenderer != NULL) { |
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136 | TRACE("Deleting licRenderer"); |
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137 | delete licRenderer; |
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138 | } |
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139 | if (velocityArrowsSlice != NULL) { |
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140 | TRACE("Deleting velocityArrowsSlice"); |
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141 | delete velocityArrowsSlice; |
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142 | } |
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143 | if (renderContext != NULL) { |
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144 | TRACE("Deleting renderContext"); |
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145 | delete renderContext; |
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146 | } |
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147 | if (screenBuffer != NULL) { |
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148 | TRACE("Deleting screenBuffer"); |
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149 | delete [] screenBuffer; |
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150 | screenBuffer = NULL; |
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151 | } |
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152 | if (fonts != NULL) { |
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153 | TRACE("Deleting fonts"); |
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154 | delete fonts; |
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155 | } |
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156 | TRACE("Leave"); |
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157 | } |
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158 | |
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159 | void |
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160 | NanoVis::eventuallyRedraw() |
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161 | { |
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162 | if (!redrawPending) { |
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163 | glutPostRedisplay(); |
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164 | redrawPending = true; |
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165 | } |
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166 | } |
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167 | |
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168 | void |
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169 | NanoVis::panCamera(float dx, float dy) |
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170 | { |
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171 | /* Move the camera and its target by equal amounts along the x and y |
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172 | * axes. */ |
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173 | TRACE("pan: x=%f, y=%f", dx, dy); |
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174 | |
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175 | _camera->x(def_eye.x - dx); |
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176 | _camera->y(def_eye.y + dy); |
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177 | TRACE("set eye to %f %f", _camera->x(), _camera->y()); |
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178 | } |
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179 | |
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180 | void |
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181 | NanoVis::zoomCamera(float z) |
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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("zoom: z=%f", z); |
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186 | |
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187 | _camera->z(def_eye.z / z); |
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188 | TRACE("set camera z to %f", _camera->z()); |
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189 | |
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190 | collectBounds(); |
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191 | |
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192 | _camera->resetClippingRange(sceneBounds.min, sceneBounds.max); |
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193 | } |
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194 | |
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195 | void |
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196 | NanoVis::rotateCamera(float phi, float theta, float psi) |
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197 | { |
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198 | _camera->orient(phi, theta, psi); |
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199 | } |
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200 | |
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201 | void |
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202 | NanoVis::orientCamera(double *quat) |
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203 | { |
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204 | _camera->orient(quat); |
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205 | } |
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206 | |
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207 | void |
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208 | NanoVis::setCameraPosition(Vector3f pos) |
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209 | { |
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210 | _camera->setPosition(pos); |
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211 | } |
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212 | |
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213 | void |
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214 | NanoVis::setCameraUpdir(Camera::AxisDirection dir) |
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215 | { |
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216 | _camera->setUpdir(dir); |
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217 | } |
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218 | |
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219 | void |
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220 | NanoVis::resetCamera(bool resetOrientation) |
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221 | { |
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222 | TRACE("Resetting all=%d", resetOrientation ? 1 : 0); |
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223 | |
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224 | collectBounds(); |
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225 | _camera->reset(sceneBounds.min, sceneBounds.max, resetOrientation); |
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226 | |
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227 | def_eye = _camera->getPosition(); |
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228 | } |
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229 | |
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230 | /** \brief Load a 3D volume |
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231 | * |
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232 | * \param name Volume ID |
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233 | * \param width Number of samples in X direction |
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234 | * \param height Number of samples in Y direction |
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235 | * \param depth Number of samples in Z direction |
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236 | * \param numComponents the number of scalars for each space point. All component |
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237 | * scalars for a point are placed consequtively in data array |
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238 | * width, height and depth: number of points in each dimension |
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239 | * \param data Array of floats |
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240 | * \param vmin Min value of field |
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241 | * \param vmax Max value of field |
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242 | * \param nonZeroMin Minimum non-zero value of field |
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243 | * \param data pointer to an array of floats. |
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244 | */ |
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245 | Volume * |
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246 | NanoVis::loadVolume(const char *name, int width, int height, int depth, |
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247 | int numComponents, float *data, double vmin, double vmax, |
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248 | double nonZeroMin) |
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249 | { |
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250 | VolumeHashmap::iterator itr = volumeTable.find(name); |
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251 | if (itr != volumeTable.end()) { |
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252 | WARN("volume \"%s\" already exists", name); |
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253 | removeVolume(itr->second); |
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254 | } |
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255 | |
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256 | Volume *volume = new Volume(width, height, depth, |
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257 | numComponents, |
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258 | data, vmin, vmax, nonZeroMin); |
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259 | Volume::updatePending = true; |
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260 | volume->name(name); |
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261 | volumeTable[name] = volume; |
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262 | |
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263 | return volume; |
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264 | } |
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265 | |
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266 | // Gets a colormap 1D texture by name. |
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267 | TransferFunction * |
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268 | NanoVis::getTransferFunction(const TransferFunctionId& id) |
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269 | { |
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270 | TransferFunctionHashmap::iterator itr = tfTable.find(id); |
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271 | if (itr == tfTable.end()) { |
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272 | TRACE("No transfer function named \"%s\" found", id.c_str()); |
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273 | return NULL; |
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274 | } else { |
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275 | return itr->second; |
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276 | } |
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277 | } |
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278 | |
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279 | // Creates of updates a colormap 1D texture by name. |
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280 | TransferFunction * |
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281 | NanoVis::defineTransferFunction(const TransferFunctionId& id, |
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282 | size_t n, float *data) |
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283 | { |
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284 | TransferFunction *tf = getTransferFunction(id); |
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285 | if (tf == NULL) { |
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286 | TRACE("Creating new transfer function \"%s\"", id.c_str()); |
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287 | tf = new TransferFunction(id.c_str(), n, data); |
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288 | tfTable[id] = tf; |
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289 | } else { |
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290 | TRACE("Updating existing transfer function \"%s\"", id.c_str()); |
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291 | tf->update(n, data); |
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292 | } |
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293 | return tf; |
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294 | } |
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295 | |
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296 | int |
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297 | NanoVis::renderLegend(TransferFunction *tf, double min, double max, |
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298 | int width, int height, const char *volArg) |
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299 | { |
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300 | TRACE("Enter"); |
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301 | |
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302 | int old_width = winWidth; |
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303 | int old_height = winHeight; |
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304 | |
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305 | planeRenderer->setScreenSize(width, height); |
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306 | resizeOffscreenBuffer(width, height); |
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307 | |
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308 | // generate data for the legend |
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309 | float data[512]; |
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310 | for (int i=0; i < 256; i++) { |
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311 | data[i] = data[i+256] = (float)(i/255.0); |
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312 | } |
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313 | legendTexture = new Texture2D(256, 2, GL_FLOAT, GL_LINEAR, 1, data); |
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314 | int index = planeRenderer->addPlane(legendTexture, tf); |
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315 | planeRenderer->setActivePlane(index); |
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316 | |
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317 | bindOffscreenBuffer(); |
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318 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); //clear screen |
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319 | planeRenderer->render(); |
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320 | |
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321 | glPixelStorei(GL_PACK_ALIGNMENT, 1); |
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322 | glReadPixels(0, 0, width, height, GL_RGB, GL_UNSIGNED_BYTE, screenBuffer); |
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323 | { |
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324 | char prefix[200]; |
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325 | |
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326 | TRACE("Sending ppm legend image %s min:%g max:%g", volArg, min, max); |
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327 | sprintf(prefix, "nv>legend %s %g %g", volArg, min, max); |
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328 | #ifdef USE_THREADS |
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329 | queuePPM(g_queue, prefix, screenBuffer, width, height); |
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330 | #else |
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331 | writePPM(g_fdOut, prefix, screenBuffer, width, height); |
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332 | #endif |
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333 | } |
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334 | planeRenderer->removePlane(index); |
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335 | resizeOffscreenBuffer(old_width, old_height); |
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336 | |
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337 | delete legendTexture; |
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338 | legendTexture = NULL; |
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339 | TRACE("Leave"); |
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340 | return TCL_OK; |
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341 | } |
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342 | |
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343 | //initialize frame buffer objects for offscreen rendering |
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344 | bool |
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345 | NanoVis::initOffscreenBuffer() |
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346 | { |
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347 | TRACE("Enter"); |
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348 | assert(_finalFbo == 0); |
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349 | // Initialize a fbo for final display. |
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350 | glGenFramebuffersEXT(1, &_finalFbo); |
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351 | |
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352 | glGenTextures(1, &_finalColorTex); |
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353 | glBindTexture(GL_TEXTURE_2D, _finalColorTex); |
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354 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
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355 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
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356 | #if defined(HAVE_FLOAT_TEXTURES) && defined(USE_HALF_FLOAT) |
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357 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, winWidth, winHeight, 0, |
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358 | GL_RGB, GL_INT, NULL); |
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359 | #elif defined(HAVE_FLOAT_TEXTURES) |
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360 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, winWidth, winHeight, 0, |
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361 | GL_RGB, GL_INT, NULL); |
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362 | #else |
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363 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, winWidth, winHeight, 0, |
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364 | GL_RGB, GL_INT, NULL); |
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365 | #endif |
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366 | |
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367 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _finalFbo); |
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368 | glGenRenderbuffersEXT(1, &_finalDepthRb); |
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369 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb); |
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370 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, |
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371 | winWidth, winHeight); |
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372 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, |
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373 | GL_TEXTURE_2D, _finalColorTex, 0); |
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374 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, |
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375 | GL_RENDERBUFFER_EXT, _finalDepthRb); |
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376 | |
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377 | GLenum status; |
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378 | if (!CheckFBO(&status)) { |
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379 | PrintFBOStatus(status, "finalFbo"); |
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380 | return false; |
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381 | } |
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382 | |
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383 | TRACE("Leave"); |
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384 | return true; |
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385 | } |
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386 | |
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387 | //resize the offscreen buffer |
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388 | bool |
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389 | NanoVis::resizeOffscreenBuffer(int w, int h) |
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390 | { |
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391 | TRACE("Enter (%d, %d)", w, h); |
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392 | if ((w == winWidth) && (h == winHeight)) { |
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393 | return true; |
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394 | } |
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395 | winWidth = w; |
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396 | winHeight = h; |
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397 | |
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398 | if (fonts) { |
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399 | fonts->resize(w, h); |
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400 | } |
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401 | TRACE("screenBuffer size: %d %d", w, h); |
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402 | |
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403 | if (screenBuffer != NULL) { |
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404 | delete [] screenBuffer; |
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405 | screenBuffer = NULL; |
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406 | } |
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407 | |
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408 | screenBuffer = new unsigned char[3*winWidth*winHeight]; |
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409 | assert(screenBuffer != NULL); |
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410 | |
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411 | //delete the current render buffer resources |
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412 | glDeleteTextures(1, &_finalColorTex); |
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413 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb); |
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414 | glDeleteRenderbuffersEXT(1, &_finalDepthRb); |
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415 | |
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416 | TRACE("before deleteframebuffers"); |
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417 | glDeleteFramebuffersEXT(1, &_finalFbo); |
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418 | |
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419 | TRACE("reinitialize FBO"); |
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420 | //Reinitialize final fbo for final display |
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421 | glGenFramebuffersEXT(1, &_finalFbo); |
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422 | |
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423 | glGenTextures(1, &_finalColorTex); |
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424 | glBindTexture(GL_TEXTURE_2D, _finalColorTex); |
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425 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR); |
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426 | glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR); |
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427 | #if defined(HAVE_FLOAT_TEXTURES) && defined(USE_HALF_FLOAT) |
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428 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA16F_ARB, winWidth, winHeight, 0, |
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429 | GL_RGB, GL_INT, NULL); |
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430 | #elif defined(HAVE_FLOAT_TEXTURES) |
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431 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA32F_ARB, winWidth, winHeight, 0, |
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432 | GL_RGB, GL_INT, NULL); |
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433 | #else |
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434 | glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, winWidth, winHeight, 0, |
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435 | GL_RGB, GL_INT, NULL); |
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436 | #endif |
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437 | |
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438 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _finalFbo); |
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439 | glGenRenderbuffersEXT(1, &_finalDepthRb); |
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440 | glBindRenderbufferEXT(GL_RENDERBUFFER_EXT, _finalDepthRb); |
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441 | glRenderbufferStorageEXT(GL_RENDERBUFFER_EXT, GL_DEPTH_COMPONENT24, |
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442 | winWidth, winHeight); |
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443 | glFramebufferTexture2DEXT(GL_FRAMEBUFFER_EXT, GL_COLOR_ATTACHMENT0_EXT, |
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444 | GL_TEXTURE_2D, _finalColorTex, 0); |
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445 | glFramebufferRenderbufferEXT(GL_FRAMEBUFFER_EXT, GL_DEPTH_ATTACHMENT_EXT, |
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446 | GL_RENDERBUFFER_EXT, _finalDepthRb); |
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447 | |
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448 | GLenum status; |
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449 | if (!CheckFBO(&status)) { |
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450 | PrintFBOStatus(status, "finalFbo"); |
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451 | return false; |
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452 | } |
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453 | |
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454 | TRACE("change camera"); |
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455 | //change the camera setting |
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456 | _camera->setViewport(0, 0, winWidth, winHeight); |
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457 | planeRenderer->setScreenSize(winWidth, winHeight); |
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458 | |
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459 | TRACE("Leave (%d, %d)", w, h); |
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460 | return true; |
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461 | } |
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462 | |
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463 | bool NanoVis::init(const char* path) |
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464 | { |
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465 | // print OpenGL driver information |
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466 | TRACE("-----------------------------------------------------------"); |
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467 | TRACE("OpenGL version: %s", glGetString(GL_VERSION)); |
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468 | TRACE("OpenGL vendor: %s", glGetString(GL_VENDOR)); |
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469 | TRACE("OpenGL renderer: %s", glGetString(GL_RENDERER)); |
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470 | TRACE("-----------------------------------------------------------"); |
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471 | |
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472 | if (path == NULL) { |
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473 | ERROR("No path defined for shaders or resources"); |
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474 | return false; |
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475 | } |
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476 | GLenum err = glewInit(); |
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477 | if (GLEW_OK != err) { |
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478 | ERROR("Can't init GLEW: %s", glewGetErrorString(err)); |
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479 | return false; |
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480 | } |
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481 | TRACE("Using GLEW %s", glewGetString(GLEW_VERSION)); |
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482 | |
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483 | // OpenGL 2.1 includes VBOs, PBOs, MRT, NPOT textures, point parameters, point sprites, |
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484 | // GLSL 1.2, and occlusion queries. |
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485 | if (!GLEW_VERSION_2_1) { |
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486 | ERROR("OpenGL version 2.1 or greater is required"); |
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487 | return false; |
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488 | } |
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489 | |
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490 | // NVIDIA driver may report OpenGL 2.1, but not support PBOs in |
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491 | // indirect GLX contexts |
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492 | if (!GLEW_ARB_pixel_buffer_object) { |
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493 | 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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494 | return false; |
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495 | } |
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496 | |
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497 | // Additional extensions not in 2.1 core |
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498 | |
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499 | // Framebuffer objects were promoted in 3.0 |
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500 | if (!GLEW_EXT_framebuffer_object) { |
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501 | ERROR("EXT_framebuffer_oject extension is required"); |
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502 | return false; |
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503 | } |
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504 | // Rectangle textures were promoted in 3.1 |
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505 | // FIXME: can use NPOT in place of rectangle textures |
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506 | if (!GLEW_ARB_texture_rectangle) { |
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507 | ERROR("ARB_texture_rectangle extension is required"); |
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508 | return false; |
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509 | } |
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510 | #ifdef HAVE_FLOAT_TEXTURES |
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511 | // Float color buffers and textures were promoted in 3.0 |
---|
512 | if (!GLEW_ARB_texture_float || |
---|
513 | !GLEW_ARB_color_buffer_float) { |
---|
514 | ERROR("ARB_texture_float and ARB_color_buffer_float extensions are required"); |
---|
515 | return false; |
---|
516 | } |
---|
517 | #endif |
---|
518 | // FIXME: should use GLSL for portability |
---|
519 | #ifdef USE_ARB_PROGRAMS |
---|
520 | if (!GLEW_ARB_vertex_program || |
---|
521 | !GLEW_ARB_fragment_program) { |
---|
522 | ERROR("ARB_vertex_program and ARB_fragment_program extensions are required"); |
---|
523 | return false; |
---|
524 | } |
---|
525 | #else |
---|
526 | if (!GLEW_NV_vertex_program3 || |
---|
527 | !GLEW_NV_fragment_program2) { |
---|
528 | ERROR("NV_vertex_program3 and NV_fragment_program2 extensions are required"); |
---|
529 | return false; |
---|
530 | } |
---|
531 | #endif |
---|
532 | |
---|
533 | if (!FilePath::getInstance()->setPath(path)) { |
---|
534 | ERROR("can't set file path to %s", path); |
---|
535 | return false; |
---|
536 | } |
---|
537 | |
---|
538 | ImageLoaderFactory::getInstance()->addLoaderImpl("bmp", new BMPImageLoaderImpl()); |
---|
539 | |
---|
540 | return true; |
---|
541 | } |
---|
542 | |
---|
543 | bool |
---|
544 | NanoVis::initGL() |
---|
545 | { |
---|
546 | TRACE("in initGL"); |
---|
547 | //buffer to store data read from the screen |
---|
548 | if (screenBuffer) { |
---|
549 | delete[] screenBuffer; |
---|
550 | screenBuffer = NULL; |
---|
551 | } |
---|
552 | screenBuffer = new unsigned char[3*winWidth*winHeight]; |
---|
553 | assert(screenBuffer != NULL); |
---|
554 | |
---|
555 | //create the camera with default setting |
---|
556 | _camera = new Camera(0, 0, winWidth, winHeight); |
---|
557 | _camera->setPosition(def_eye); |
---|
558 | |
---|
559 | glEnable(GL_TEXTURE_2D); |
---|
560 | glShadeModel(GL_FLAT); |
---|
561 | glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); |
---|
562 | glClearColor(0, 0, 0, 1); |
---|
563 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
---|
564 | |
---|
565 | //initialize lighting |
---|
566 | GLfloat mat_specular[] = {1.0, 1.0, 1.0, 1.0}; |
---|
567 | GLfloat mat_shininess[] = {30.0}; |
---|
568 | GLfloat white_light[] = {1.0, 1.0, 1.0, 1.0}; |
---|
569 | |
---|
570 | glMaterialfv(GL_FRONT, GL_SPECULAR, mat_specular); |
---|
571 | glMaterialfv(GL_FRONT, GL_SHININESS, mat_shininess); |
---|
572 | glLightfv(GL_LIGHT0, GL_DIFFUSE, white_light); |
---|
573 | glLightfv(GL_LIGHT0, GL_SPECULAR, white_light); |
---|
574 | glLightfv(GL_LIGHT1, GL_DIFFUSE, white_light); |
---|
575 | glLightfv(GL_LIGHT1, GL_SPECULAR, white_light); |
---|
576 | |
---|
577 | //frame buffer object for offscreen rendering |
---|
578 | if (!initOffscreenBuffer()) { |
---|
579 | return false; |
---|
580 | } |
---|
581 | |
---|
582 | fonts = new Fonts(); |
---|
583 | fonts->addFont("verdana", "verdana.fnt"); |
---|
584 | fonts->setFont("verdana"); |
---|
585 | |
---|
586 | renderContext = new RenderContext(); |
---|
587 | |
---|
588 | volRenderer = new VolumeRenderer(); |
---|
589 | |
---|
590 | planeRenderer = new PlaneRenderer(winWidth, winHeight); |
---|
591 | |
---|
592 | velocityArrowsSlice = new VelocityArrowsSlice(); |
---|
593 | |
---|
594 | licRenderer = new LIC(); |
---|
595 | |
---|
596 | orientationIndicator = new OrientationIndicator(); |
---|
597 | |
---|
598 | grid = new Grid(); |
---|
599 | grid->setFont(fonts); |
---|
600 | |
---|
601 | //assert(glGetError()==0); |
---|
602 | |
---|
603 | TRACE("leaving initGL"); |
---|
604 | |
---|
605 | return true; |
---|
606 | } |
---|
607 | |
---|
608 | void NanoVis::update() |
---|
609 | { |
---|
610 | VolumeInterpolator *volInterp = volRenderer->getVolumeInterpolator(); |
---|
611 | if (volInterp->isStarted()) { |
---|
612 | struct timeval clock; |
---|
613 | gettimeofday(&clock, NULL); |
---|
614 | double elapsed_time = clock.tv_sec + clock.tv_usec/1000000.0 - |
---|
615 | volInterp->getStartTime(); |
---|
616 | |
---|
617 | TRACE("%g %g", elapsed_time, |
---|
618 | volInterp->getInterval()); |
---|
619 | double fraction; |
---|
620 | double f = fmod(elapsed_time, volInterp->getInterval()); |
---|
621 | if (f == 0.0) { |
---|
622 | fraction = 0.0; |
---|
623 | } else { |
---|
624 | fraction = f / volInterp->getInterval(); |
---|
625 | } |
---|
626 | TRACE("fraction : %g", fraction); |
---|
627 | volInterp->update((float)fraction); |
---|
628 | } |
---|
629 | } |
---|
630 | |
---|
631 | /** |
---|
632 | * \brief Called when new volumes are added to update ranges |
---|
633 | */ |
---|
634 | void |
---|
635 | NanoVis::setVolumeRanges() |
---|
636 | { |
---|
637 | TRACE("Enter"); |
---|
638 | |
---|
639 | double xMin, xMax, yMin, yMax, zMin, zMax; |
---|
640 | xMin = yMin = zMin = DBL_MAX; |
---|
641 | xMax = yMax = zMax = -DBL_MAX; |
---|
642 | double valueMin = DBL_MAX, valueMax = -DBL_MAX; |
---|
643 | VolumeHashmap::iterator itr; |
---|
644 | for (itr = volumeTable.begin(); |
---|
645 | itr != volumeTable.end(); ++itr) { |
---|
646 | Volume *volume = itr->second; |
---|
647 | if (xMin > volume->xAxis.min()) { |
---|
648 | xMin = volume->xAxis.min(); |
---|
649 | } |
---|
650 | if (xMax < volume->xAxis.max()) { |
---|
651 | xMax = volume->xAxis.max(); |
---|
652 | } |
---|
653 | if (yMin > volume->yAxis.min()) { |
---|
654 | yMin = volume->yAxis.min(); |
---|
655 | } |
---|
656 | if (yMax < volume->yAxis.max()) { |
---|
657 | yMax = volume->yAxis.max(); |
---|
658 | } |
---|
659 | if (zMin > volume->zAxis.min()) { |
---|
660 | zMin = volume->zAxis.min(); |
---|
661 | } |
---|
662 | if (zMax < volume->zAxis.max()) { |
---|
663 | zMax = volume->zAxis.max(); |
---|
664 | } |
---|
665 | if (valueMin > volume->wAxis.min()) { |
---|
666 | valueMin = volume->wAxis.min(); |
---|
667 | } |
---|
668 | if (valueMax < volume->wAxis.max()) { |
---|
669 | valueMax = volume->wAxis.max(); |
---|
670 | } |
---|
671 | } |
---|
672 | if ((xMin < DBL_MAX) && (xMax > -DBL_MAX)) { |
---|
673 | grid->xAxis.setRange(xMin, xMax); |
---|
674 | } |
---|
675 | if ((yMin < DBL_MAX) && (yMax > -DBL_MAX)) { |
---|
676 | grid->yAxis.setRange(yMin, yMax); |
---|
677 | } |
---|
678 | if ((zMin < DBL_MAX) && (zMax > -DBL_MAX)) { |
---|
679 | grid->zAxis.setRange(zMin, zMax); |
---|
680 | } |
---|
681 | if ((valueMin < DBL_MAX) && (valueMax > -DBL_MAX)) { |
---|
682 | Volume::valueMin = valueMin; |
---|
683 | Volume::valueMax = valueMax; |
---|
684 | } |
---|
685 | Volume::updatePending = false; |
---|
686 | TRACE("Leave"); |
---|
687 | } |
---|
688 | |
---|
689 | /** |
---|
690 | * \brief Called when new heightmaps are added to update ranges |
---|
691 | */ |
---|
692 | void |
---|
693 | NanoVis::setHeightmapRanges() |
---|
694 | { |
---|
695 | TRACE("Enter"); |
---|
696 | |
---|
697 | double xMin, xMax, yMin, yMax, zMin, zMax; |
---|
698 | xMin = yMin = zMin = DBL_MAX; |
---|
699 | xMax = yMax = zMax = -DBL_MAX; |
---|
700 | double valueMin = DBL_MAX, valueMax = -DBL_MAX; |
---|
701 | HeightMapHashmap::iterator itr; |
---|
702 | for (itr = heightMapTable.begin(); |
---|
703 | itr != heightMapTable.end(); ++itr) { |
---|
704 | HeightMap *heightMap = itr->second; |
---|
705 | if (xMin > heightMap->xAxis.min()) { |
---|
706 | xMin = heightMap->xAxis.min(); |
---|
707 | } |
---|
708 | if (xMax < heightMap->xAxis.max()) { |
---|
709 | xMax = heightMap->xAxis.max(); |
---|
710 | } |
---|
711 | if (yMin > heightMap->yAxis.min()) { |
---|
712 | yMin = heightMap->yAxis.min(); |
---|
713 | } |
---|
714 | if (yMax < heightMap->yAxis.max()) { |
---|
715 | yMax = heightMap->yAxis.max(); |
---|
716 | } |
---|
717 | if (zMin > heightMap->zAxis.min()) { |
---|
718 | zMin = heightMap->zAxis.min(); |
---|
719 | } |
---|
720 | if (zMax < heightMap->zAxis.max()) { |
---|
721 | zMax = heightMap->zAxis.max(); |
---|
722 | } |
---|
723 | if (valueMin > heightMap->wAxis.min()) { |
---|
724 | valueMin = heightMap->wAxis.min(); |
---|
725 | } |
---|
726 | if (valueMax < heightMap->wAxis.max()) { |
---|
727 | valueMax = heightMap->wAxis.max(); |
---|
728 | } |
---|
729 | } |
---|
730 | if ((xMin < DBL_MAX) && (xMax > -DBL_MAX)) { |
---|
731 | grid->xAxis.setRange(xMin, xMax); |
---|
732 | } |
---|
733 | if ((yMin < DBL_MAX) && (yMax > -DBL_MAX)) { |
---|
734 | grid->yAxis.setRange(yMin, yMax); |
---|
735 | } |
---|
736 | if ((zMin < DBL_MAX) && (zMax > -DBL_MAX)) { |
---|
737 | grid->zAxis.setRange(zMin, zMax); |
---|
738 | } |
---|
739 | if ((valueMin < DBL_MAX) && (valueMax > -DBL_MAX)) { |
---|
740 | HeightMap::valueMin = valueMin; |
---|
741 | HeightMap::valueMax = valueMax; |
---|
742 | } |
---|
743 | for (HeightMapHashmap::iterator itr = heightMapTable.begin(); |
---|
744 | itr != heightMapTable.end(); ++itr) { |
---|
745 | itr->second->mapToGrid(grid); |
---|
746 | } |
---|
747 | HeightMap::updatePending = false; |
---|
748 | TRACE("Leave"); |
---|
749 | } |
---|
750 | |
---|
751 | void |
---|
752 | NanoVis::collectBounds(bool onlyVisible) |
---|
753 | { |
---|
754 | if (Flow::updatePending) { |
---|
755 | setFlowRanges(); |
---|
756 | grid->xAxis.setRange(xMin, xMax); |
---|
757 | grid->yAxis.setRange(yMin, yMax); |
---|
758 | grid->zAxis.setRange(zMin, zMax); |
---|
759 | } |
---|
760 | |
---|
761 | sceneBounds.makeEmpty(); |
---|
762 | |
---|
763 | for (VolumeHashmap::iterator itr = volumeTable.begin(); |
---|
764 | itr != volumeTable.end(); ++itr) { |
---|
765 | Volume *volume = itr->second; |
---|
766 | |
---|
767 | if (onlyVisible && !volume->visible()) |
---|
768 | continue; |
---|
769 | |
---|
770 | BBox bbox; |
---|
771 | volume->getWorldSpaceBounds(bbox.min, bbox.max); |
---|
772 | sceneBounds.extend(bbox); |
---|
773 | } |
---|
774 | |
---|
775 | for (HeightMapHashmap::iterator itr = heightMapTable.begin(); |
---|
776 | itr != heightMapTable.end(); ++itr) { |
---|
777 | HeightMap *heightMap = itr->second; |
---|
778 | |
---|
779 | if (onlyVisible && !heightMap->isVisible()) |
---|
780 | continue; |
---|
781 | |
---|
782 | BBox bbox; |
---|
783 | heightMap->getWorldSpaceBounds(bbox.min, bbox.max); |
---|
784 | sceneBounds.extend(bbox); |
---|
785 | } |
---|
786 | |
---|
787 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
788 | itr != flowTable.end(); ++itr) { |
---|
789 | Flow *flow = itr->second; |
---|
790 | |
---|
791 | BBox bbox; |
---|
792 | flow->getBounds(bbox.min, bbox.max, onlyVisible); |
---|
793 | sceneBounds.extend(bbox); |
---|
794 | } |
---|
795 | |
---|
796 | #if 0 |
---|
797 | if (!onlyVisible || grid->isVisible()) { |
---|
798 | BBox bbox; |
---|
799 | grid->getBounds(bbox.min, bbox.max); |
---|
800 | sceneBounds.extend(bbox); |
---|
801 | } |
---|
802 | #endif |
---|
803 | |
---|
804 | if (sceneBounds.isEmpty()) { |
---|
805 | sceneBounds.min.set(-0.5, -0.5, -0.5); |
---|
806 | sceneBounds.max.set( 0.5, 0.5, 0.5); |
---|
807 | } |
---|
808 | |
---|
809 | TRACE("Scene bounds: (%g,%g,%g) - (%g,%g,%g)", |
---|
810 | sceneBounds.min.x, sceneBounds.min.y, sceneBounds.min.z, |
---|
811 | sceneBounds.max.x, sceneBounds.max.y, sceneBounds.max.z); |
---|
812 | } |
---|
813 | |
---|
814 | void |
---|
815 | NanoVis::setBgColor(float color[3]) |
---|
816 | { |
---|
817 | TRACE("Setting bgcolor to %g %g %g", color[0], color[1], color[2]); |
---|
818 | glClearColor(color[0], color[1], color[2], 1); |
---|
819 | } |
---|
820 | |
---|
821 | void |
---|
822 | NanoVis::removeVolume(Volume *volume) |
---|
823 | { |
---|
824 | VolumeHashmap::iterator itr = volumeTable.find(volume->name()); |
---|
825 | if (itr != volumeTable.end()) { |
---|
826 | volumeTable.erase(itr); |
---|
827 | } |
---|
828 | delete volume; |
---|
829 | } |
---|
830 | |
---|
831 | Flow * |
---|
832 | NanoVis::getFlow(const char *name) |
---|
833 | { |
---|
834 | FlowHashmap::iterator itr = flowTable.find(name); |
---|
835 | if (itr == flowTable.end()) { |
---|
836 | TRACE("Can't find flow '%s'", name); |
---|
837 | return NULL; |
---|
838 | } |
---|
839 | return itr->second; |
---|
840 | } |
---|
841 | |
---|
842 | Flow * |
---|
843 | NanoVis::createFlow(Tcl_Interp *interp, const char *name) |
---|
844 | { |
---|
845 | FlowHashmap::iterator itr = flowTable.find(name); |
---|
846 | if (itr != flowTable.end()) { |
---|
847 | ERROR("Flow '%s' already exists", name); |
---|
848 | return NULL; |
---|
849 | } |
---|
850 | Flow *flow = new Flow(interp, name); |
---|
851 | flowTable[name] = flow; |
---|
852 | return flow; |
---|
853 | } |
---|
854 | |
---|
855 | /** |
---|
856 | * \brief Delete flow object and hash table entry |
---|
857 | * |
---|
858 | * This is called by the flow command instance delete callback |
---|
859 | */ |
---|
860 | void |
---|
861 | NanoVis::deleteFlow(const char *name) |
---|
862 | { |
---|
863 | FlowHashmap::iterator itr = flowTable.find(name); |
---|
864 | if (itr != flowTable.end()) { |
---|
865 | delete itr->second; |
---|
866 | flowTable.erase(itr); |
---|
867 | } |
---|
868 | } |
---|
869 | |
---|
870 | /** |
---|
871 | * \brief Delete all flow object commands |
---|
872 | * |
---|
873 | * This will also delete the flow objects and hash table entries |
---|
874 | */ |
---|
875 | void |
---|
876 | NanoVis::deleteFlows(Tcl_Interp *interp) |
---|
877 | { |
---|
878 | FlowHashmap::iterator itr; |
---|
879 | for (itr = flowTable.begin(); |
---|
880 | itr != flowTable.end(); ++itr) { |
---|
881 | Tcl_DeleteCommandFromToken(interp, itr->second->getCommandToken()); |
---|
882 | } |
---|
883 | flowTable.clear(); |
---|
884 | } |
---|
885 | |
---|
886 | /** |
---|
887 | * \brief Called when new flows are added to update ranges |
---|
888 | */ |
---|
889 | bool |
---|
890 | NanoVis::setFlowRanges() |
---|
891 | { |
---|
892 | TRACE("Enter"); |
---|
893 | |
---|
894 | /* |
---|
895 | * Step 1. Get the overall min and max magnitudes of all the |
---|
896 | * flow vectors. |
---|
897 | */ |
---|
898 | Flow::magMin = DBL_MAX; |
---|
899 | Flow::magMax = -DBL_MAX; |
---|
900 | |
---|
901 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
902 | itr != flowTable.end(); ++itr) { |
---|
903 | Flow *flow = itr->second; |
---|
904 | if (!flow->isDataLoaded()) { |
---|
905 | continue; |
---|
906 | } |
---|
907 | Unirect3d *data = flow->data(); |
---|
908 | double range[2]; |
---|
909 | range[0] = data->magMin(); |
---|
910 | range[1] = data->magMax(); |
---|
911 | if (range[0] < Flow::magMin) { |
---|
912 | Flow::magMin = range[0]; |
---|
913 | } |
---|
914 | if (range[1] > Flow::magMax) { |
---|
915 | Flow::magMax = range[1]; |
---|
916 | } |
---|
917 | if (data->xMin() < xMin) { |
---|
918 | xMin = data->xMin(); |
---|
919 | } |
---|
920 | if (data->yMin() < yMin) { |
---|
921 | yMin = data->yMin(); |
---|
922 | } |
---|
923 | if (data->zMin() < zMin) { |
---|
924 | zMin = data->zMin(); |
---|
925 | } |
---|
926 | if (data->xMax() > xMax) { |
---|
927 | xMax = data->xMax(); |
---|
928 | } |
---|
929 | if (data->yMax() > yMax) { |
---|
930 | yMax = data->yMax(); |
---|
931 | } |
---|
932 | if (data->zMax() > zMax) { |
---|
933 | zMax = data->zMax(); |
---|
934 | } |
---|
935 | } |
---|
936 | |
---|
937 | TRACE("magMin=%g magMax=%g", Flow::magMin, Flow::magMax); |
---|
938 | |
---|
939 | /* |
---|
940 | * Step 2. Generate the vector field from each data set. |
---|
941 | */ |
---|
942 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
943 | itr != flowTable.end(); ++itr) { |
---|
944 | Flow *flow = itr->second; |
---|
945 | if (!flow->isDataLoaded()) { |
---|
946 | continue; // Flow exists, but no data has been loaded yet. |
---|
947 | } |
---|
948 | if (flow->visible()) { |
---|
949 | flow->initializeParticles(); |
---|
950 | } |
---|
951 | if (!flow->scaleVectorField()) { |
---|
952 | return false; |
---|
953 | } |
---|
954 | // FIXME: This doesn't work when there is more than one flow. |
---|
955 | licRenderer->setSlicePosition(flow->getRelativePosition()); |
---|
956 | velocityArrowsSlice->setSlicePosition(flow->getRelativePosition()); |
---|
957 | } |
---|
958 | advectFlows(); |
---|
959 | |
---|
960 | Flow::updatePending = false; |
---|
961 | return true; |
---|
962 | } |
---|
963 | |
---|
964 | void |
---|
965 | NanoVis::renderFlows() |
---|
966 | { |
---|
967 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
968 | itr != flowTable.end(); ++itr) { |
---|
969 | Flow *flow = itr->second; |
---|
970 | if (flow->isDataLoaded() && flow->visible()) { |
---|
971 | flow->render(); |
---|
972 | } |
---|
973 | } |
---|
974 | } |
---|
975 | |
---|
976 | void |
---|
977 | NanoVis::resetFlows() |
---|
978 | { |
---|
979 | NanoVis::licRenderer->reset(); |
---|
980 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
981 | itr != flowTable.end(); ++itr) { |
---|
982 | Flow *flow = itr->second; |
---|
983 | if (flow->isDataLoaded()) { |
---|
984 | flow->resetParticles(); |
---|
985 | } |
---|
986 | } |
---|
987 | } |
---|
988 | |
---|
989 | void |
---|
990 | NanoVis::advectFlows() |
---|
991 | { |
---|
992 | TRACE("Enter"); |
---|
993 | for (FlowHashmap::iterator itr = flowTable.begin(); |
---|
994 | itr != flowTable.end(); ++itr) { |
---|
995 | Flow *flow = itr->second; |
---|
996 | if (flow->isDataLoaded()) { |
---|
997 | flow->advect(); |
---|
998 | } |
---|
999 | } |
---|
1000 | } |
---|
1001 | |
---|
1002 | void |
---|
1003 | NanoVis::render() |
---|
1004 | { |
---|
1005 | TRACE("Enter"); |
---|
1006 | |
---|
1007 | if (Flow::updatePending) { |
---|
1008 | setFlowRanges(); |
---|
1009 | grid->xAxis.setRange(xMin, xMax); |
---|
1010 | grid->yAxis.setRange(yMin, yMax); |
---|
1011 | grid->zAxis.setRange(zMin, zMax); |
---|
1012 | } |
---|
1013 | if (HeightMap::updatePending) { |
---|
1014 | setHeightmapRanges(); |
---|
1015 | } |
---|
1016 | if (Volume::updatePending) { |
---|
1017 | setVolumeRanges(); |
---|
1018 | } |
---|
1019 | |
---|
1020 | // Start final rendering |
---|
1021 | |
---|
1022 | // Need to reset fbo since it may have been changed to default (0) |
---|
1023 | bindOffscreenBuffer(); |
---|
1024 | |
---|
1025 | // Clear screen |
---|
1026 | glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); |
---|
1027 | |
---|
1028 | glEnable(GL_DEPTH_TEST); |
---|
1029 | glEnable(GL_COLOR_MATERIAL); |
---|
1030 | |
---|
1031 | // Emit modelview and projection matrices |
---|
1032 | _camera->initialize(); |
---|
1033 | |
---|
1034 | // Rotate for updir if required |
---|
1035 | glPushMatrix(); |
---|
1036 | |
---|
1037 | switch (_camera->getUpdir()) { |
---|
1038 | case Camera::X_POS: |
---|
1039 | glRotatef(90, 0, 0, 1); |
---|
1040 | glRotatef(90, 1, 0, 0); |
---|
1041 | break; |
---|
1042 | case Camera::Y_POS: |
---|
1043 | // this is the default |
---|
1044 | break; |
---|
1045 | case Camera::Z_POS: |
---|
1046 | glRotatef(-90, 1, 0, 0); |
---|
1047 | glRotatef(-90, 0, 0, 1); |
---|
1048 | break; |
---|
1049 | case Camera::X_NEG: |
---|
1050 | glRotatef(-90, 0, 0, 1); |
---|
1051 | break; |
---|
1052 | case Camera::Y_NEG: |
---|
1053 | glRotatef(180, 0, 0, 1); |
---|
1054 | glRotatef(-90, 0, 1, 0); |
---|
1055 | break; |
---|
1056 | case Camera::Z_NEG: |
---|
1057 | glRotatef(90, 1, 0, 0); |
---|
1058 | break; |
---|
1059 | } |
---|
1060 | |
---|
1061 | // Now render things in the scene |
---|
1062 | //orientationIndicator->setPosition(sceneBounds.getCenter()); |
---|
1063 | //orientationIndicator->setScale(sceneBounds.getSize()); |
---|
1064 | orientationIndicator->render(); |
---|
1065 | |
---|
1066 | grid->render(); |
---|
1067 | |
---|
1068 | licRenderer->render(); |
---|
1069 | |
---|
1070 | velocityArrowsSlice->render(); |
---|
1071 | |
---|
1072 | renderFlows(); |
---|
1073 | |
---|
1074 | volRenderer->renderAll(); |
---|
1075 | |
---|
1076 | for (HeightMapHashmap::iterator itr = heightMapTable.begin(); |
---|
1077 | itr != heightMapTable.end(); ++itr) { |
---|
1078 | itr->second->render(renderContext); |
---|
1079 | } |
---|
1080 | glPopMatrix(); |
---|
1081 | |
---|
1082 | CHECK_FRAMEBUFFER_STATUS(); |
---|
1083 | TRACE("Leave"); |
---|
1084 | redrawPending = false; |
---|
1085 | } |
---|