1 | /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ |
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2 | /* |
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3 | * Copyright (c) 2004-2013 HUBzero Foundation, LLC |
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4 | * |
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5 | */ |
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6 | #ifndef NV_HEIGHTMAP_H |
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7 | #define NV_HEIGHTMAP_H |
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8 | |
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9 | #include <graphics/Geometry.h> |
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10 | #include <graphics/RenderContext.h> |
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11 | #include <vrmath/Vector3f.h> |
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12 | |
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13 | #include "TransferFunction.h" |
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14 | #include "Shader.h" |
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15 | #include "AxisRange.h" |
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16 | |
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17 | namespace nv { |
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18 | |
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19 | class Grid; |
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20 | |
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21 | /** |
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22 | *@brief Create a surface from height map and line contour of the generated surface |
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23 | */ |
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24 | class HeightMap |
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25 | { |
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26 | public: |
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27 | HeightMap(); |
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28 | |
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29 | ~HeightMap(); |
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30 | |
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31 | void render(nv::graphics::RenderContext *renderContext); |
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32 | |
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33 | /** |
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34 | *@brief Create a height map with height values |
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35 | *@param startX x position of the first height value |
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36 | *@param startY y position of the first height value |
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37 | *@param endX x position of the last height value |
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38 | *@param endY y position of the last height value |
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39 | *@param xCount the number of columns of height values |
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40 | *@param yCount the number of rows of height values |
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41 | *@param height a pointer value adrressing xCount * yCount values of heights |
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42 | */ |
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43 | void setHeight(float startX, float startY, float endX, float endY, |
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44 | int xCount, int yCount, float *height); |
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45 | #if 0 |
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46 | /** |
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47 | *@brief Create a height map with a set of points |
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48 | *@param xCount the number of columns of height values |
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49 | *@param yCount the number of rows of height values |
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50 | */ |
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51 | void setHeight(int xCount, int yCount, vrmath::Vector3f *heights); |
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52 | #endif |
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53 | void mapToGrid(Grid *grid); |
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54 | |
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55 | /** |
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56 | *@brief Define a color map for color shading of heightmap |
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57 | */ |
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58 | void transferFunction(TransferFunction *transferFunc) |
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59 | { |
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60 | _transferFunc = transferFunc; |
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61 | } |
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62 | |
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63 | /** |
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64 | *@brief Get the color map defined for shading of this heightmap |
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65 | */ |
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66 | TransferFunction *transferFunction() |
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67 | { |
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68 | return _transferFunc; |
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69 | } |
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70 | |
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71 | /** |
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72 | *@brief Set the visibility of the height map |
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73 | */ |
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74 | void setVisible(bool visible) |
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75 | { |
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76 | _visible = visible; |
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77 | } |
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78 | |
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79 | /** |
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80 | *@brief Return the status of the visibility |
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81 | */ |
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82 | bool isVisible() const |
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83 | { |
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84 | return _visible; |
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85 | } |
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86 | |
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87 | /** |
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88 | *@brief Set the visibility of the line contour |
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89 | */ |
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90 | void setLineContourVisible(bool visible) |
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91 | { |
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92 | _contourVisible = visible; |
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93 | } |
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94 | |
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95 | void opacity(float opacity) |
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96 | { |
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97 | _opacity = opacity; |
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98 | } |
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99 | |
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100 | float opacity() |
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101 | { |
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102 | return _opacity; |
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103 | } |
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104 | |
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105 | /** |
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106 | *@brief Defind the color of the line contour |
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107 | */ |
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108 | void setLineContourColor(float *rgb) |
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109 | { |
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110 | _contourColor.x = rgb[0]; |
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111 | _contourColor.y = rgb[1]; |
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112 | _contourColor.z = rgb[2]; |
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113 | } |
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114 | |
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115 | void getBounds(vrmath::Vector3f& bboxMin, vrmath::Vector3f& bboxMax) const; |
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116 | |
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117 | AxisRange xAxis, yAxis, zAxis, wAxis; |
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118 | static bool updatePending; |
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119 | static double valueMin, valueMax; |
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120 | |
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121 | private: |
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122 | void createIndexBuffer(int xCount, int zCount, float *heights); |
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123 | vrmath::Vector3f *createHeightVertices(float startX, float startY, |
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124 | float endX, float endY, |
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125 | int xCount, int yCount, float *height); |
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126 | void reset(); |
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127 | |
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128 | unsigned int _vertexBufferObjectID; |
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129 | unsigned int _texcoordBufferObjectID; |
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130 | int _vertexCount; |
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131 | nv::graphics::Geometry *_contour; |
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132 | TransferFunction *_transferFunc; |
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133 | float _opacity; |
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134 | Shader *_shader; |
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135 | int *_indexBuffer; |
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136 | int _indexCount; |
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137 | vrmath::Vector3f _contourColor; |
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138 | |
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139 | bool _contourVisible; |
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140 | bool _visible; |
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141 | |
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142 | vrmath::Vector3f _scale; |
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143 | vrmath::Vector3f _centerPoint; |
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144 | int _xNum, _yNum; // Number of elements x and y axes in grid. |
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145 | float *_heights; // Array of original (unscaled) heights |
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146 | // (y-values) |
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147 | }; |
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148 | |
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149 | } |
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150 | |
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151 | #endif |
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