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.h: package header |
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5 | * |
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6 | * ====================================================================== |
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7 | * AUTHOR: Wei Qiao <qiaow@purdue.edu> |
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8 | * Purdue Rendering and Perceptualization Lab (PURPL) |
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9 | * |
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10 | * Copyright (c) 2004-2013 HUBzero Foundation, LLC |
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11 | * |
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12 | * See the file "license.terms" for information on usage and |
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13 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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14 | * ====================================================================== |
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15 | */ |
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16 | #ifndef NV_NANOVIS_H |
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17 | #define NV_NANOVIS_H |
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18 | |
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19 | #include <cstddef> // For size_t |
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20 | #include <string> |
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21 | #include <tr1/unordered_map> |
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22 | |
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23 | #include <tcl.h> |
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24 | |
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25 | #include <GL/glew.h> |
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26 | |
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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 "config.h" |
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31 | #include "Camera.h" |
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32 | |
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33 | //defines for the image based flow visualization |
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34 | #define NMESH 256 //resolution of flow mesh |
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35 | #define NPIX 512 //display size |
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36 | |
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37 | namespace nv { |
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38 | namespace graphics { |
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39 | class RenderContext; |
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40 | } |
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41 | namespace util { |
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42 | class Fonts; |
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43 | } |
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44 | |
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45 | class Flow; |
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46 | class Grid; |
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47 | class HeightMap; |
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48 | class LIC; |
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49 | class OrientationIndicator; |
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50 | class PlaneRenderer; |
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51 | class Texture2D; |
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52 | class TransferFunction; |
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53 | class VelocityArrowsSlice; |
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54 | class Volume; |
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55 | class VolumeRenderer; |
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56 | |
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57 | class NanoVis |
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58 | { |
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59 | public: |
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60 | typedef std::string TransferFunctionId; |
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61 | typedef std::string VolumeId; |
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62 | typedef std::string FlowId; |
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63 | typedef std::string HeightMapId; |
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64 | typedef std::tr1::unordered_map<TransferFunctionId, TransferFunction *> TransferFunctionHashmap; |
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65 | typedef std::tr1::unordered_map<VolumeId, Volume *> VolumeHashmap; |
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66 | typedef std::tr1::unordered_map<FlowId, Flow *> FlowHashmap; |
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67 | typedef std::tr1::unordered_map<HeightMapId, HeightMap *> HeightMapHashmap; |
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68 | |
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69 | static bool init(const char *path); |
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70 | static bool initGL(); |
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71 | static bool initOffscreenBuffer(); |
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72 | static bool resizeOffscreenBuffer(int w, int h); |
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73 | static void setBgColor(float color[3]); |
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74 | static void render(); |
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75 | static void update(); |
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76 | static void removeAllData(); |
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77 | |
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78 | static const Camera *getCamera() |
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79 | { |
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80 | return _camera; |
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81 | } |
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82 | static void panCamera(float dx, float dy); |
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83 | static void zoomCamera(float z); |
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84 | static void orientCamera(double *quat); |
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85 | static void setCameraPosition(vrmath::Vector3f pos); |
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86 | static void setCameraUpdir(Camera::AxisDirection dir); |
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87 | static void resetCamera(bool resetOrientation = false); |
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88 | |
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89 | static void eventuallyRedraw(); |
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90 | |
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91 | static TransferFunction *getTransferFunction(const TransferFunctionId& id); |
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92 | static TransferFunction *defineTransferFunction(const TransferFunctionId& id, |
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93 | size_t n, float *data); |
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94 | |
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95 | static int renderLegend(TransferFunction *tf, double min, double max, |
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96 | int width, int height, const char *volArg); |
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97 | |
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98 | static Volume *loadVolume(const char *tag, int width, int height, int depth, |
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99 | int numComponents, float *data, double vmin, double vmax, |
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100 | double nonZeroMin); |
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101 | |
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102 | static void removeVolume(Volume *volume); |
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103 | |
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104 | static void readScreen() |
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105 | { |
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106 | glPixelStorei(GL_PACK_ALIGNMENT, 1); |
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107 | glReadPixels(0, 0, winWidth, winHeight, GL_RGB, GL_UNSIGNED_BYTE, |
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108 | screenBuffer); |
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109 | } |
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110 | static void bindOffscreenBuffer() |
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111 | { |
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112 | glBindFramebufferEXT(GL_FRAMEBUFFER_EXT, _finalFbo); |
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113 | } |
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114 | |
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115 | static void setVolumeRanges(); |
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116 | static void setHeightmapRanges(); |
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117 | static bool setFlowRanges(); |
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118 | |
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119 | static Flow *getFlow(const char *name); |
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120 | static Flow *createFlow(Tcl_Interp *interp, const char *name); |
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121 | static void deleteFlows(Tcl_Interp *interp); |
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122 | static void deleteFlow(const char *name); |
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123 | |
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124 | static void renderFlows(); |
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125 | static void resetFlows(); |
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126 | static bool updateFlows(); |
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127 | static void advectFlows(); |
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128 | |
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129 | static Tcl_Interp *interp; |
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130 | |
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131 | static bool redrawPending; |
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132 | static bool debugFlag; |
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133 | |
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134 | static int winWidth; ///< Width of the render window |
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135 | static int winHeight; ///< Height of the render window |
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136 | static int renderWindow; ///< GLUT handle for the render window |
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137 | static unsigned char *screenBuffer; |
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138 | static Texture2D *legendTexture; |
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139 | static util::Fonts *fonts; |
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140 | static graphics::RenderContext *renderContext; |
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141 | |
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142 | static TransferFunctionHashmap tfTable; ///< maps transfunc name to TransferFunction object |
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143 | static VolumeHashmap volumeTable; |
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144 | static FlowHashmap flowTable; |
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145 | static HeightMapHashmap heightMapTable; |
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146 | |
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147 | static vrmath::BBox sceneBounds; |
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148 | |
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149 | static VolumeRenderer *volRenderer; |
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150 | static VelocityArrowsSlice *velocityArrowsSlice; |
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151 | static LIC *licRenderer; |
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152 | static PlaneRenderer *planeRenderer; |
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153 | static OrientationIndicator *orientationIndicator; |
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154 | static Grid *grid; |
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155 | |
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156 | private: |
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157 | static void collectBounds(bool onlyVisible = false); |
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158 | |
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159 | static Camera *_camera; |
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160 | |
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161 | //frame buffer for final rendering |
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162 | static GLuint _finalFbo, _finalColorTex, _finalDepthRb; |
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163 | }; |
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164 | |
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165 | } |
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166 | |
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167 | #endif |
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