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 | * Authors: |
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6 | * Wei Qiao <qiaow@purdue.edu> |
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7 | */ |
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8 | #ifndef NV_PARTICLE_RENDERER_H |
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9 | #define NV_PARTICLE_RENDERER_H |
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10 | |
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11 | #include <GL/glew.h> |
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12 | |
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13 | #include <vrmath/Vector3f.h> |
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14 | #include <vrmath/Color4f.h> |
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15 | |
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16 | #include "FlowTypes.h" |
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17 | #include "ParticleAdvectionShader.h" |
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18 | #include "RenderVertexArray.h" |
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19 | |
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20 | namespace nv { |
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21 | |
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22 | struct Particle { |
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23 | float x; |
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24 | float y; |
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25 | float z; |
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26 | float life; |
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27 | |
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28 | Particle() |
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29 | {} |
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30 | |
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31 | Particle(float _x, float _y, float _z, float _life) : |
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32 | x(_x), |
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33 | y(_y), |
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34 | z(_z), |
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35 | life(_life) |
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36 | {} |
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37 | }; |
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38 | |
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39 | class ParticleRenderer |
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40 | { |
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41 | public: |
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42 | ParticleRenderer(int w, int h); |
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43 | |
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44 | ~ParticleRenderer(); |
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45 | |
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46 | void setVectorField(unsigned int texID, const vrmath::Vector3f& origin, |
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47 | float scaleX, float scaleY, float scaleZ, float max); |
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48 | |
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49 | void initialize(); |
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50 | |
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51 | void advect(); |
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52 | |
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53 | void reset(); |
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54 | |
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55 | void render(); |
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56 | |
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57 | bool active() const |
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58 | { |
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59 | return _activate; |
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60 | } |
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61 | |
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62 | void active(bool state) |
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63 | { |
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64 | _activate = state; |
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65 | } |
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66 | |
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67 | void setColor(const vrmath::Color4f& color) |
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68 | { |
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69 | _color = color; |
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70 | } |
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71 | |
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72 | void setSliceAxis(FlowSliceAxis axis); |
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73 | |
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74 | FlowSliceAxis getSliceAxis() const |
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75 | { |
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76 | return _sliceAxis; |
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77 | } |
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78 | |
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79 | void setSlicePosition(float pos); |
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80 | |
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81 | float getSlicePosition() const |
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82 | { |
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83 | return _slicePos; |
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84 | } |
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85 | |
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86 | void particleSize(float size) |
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87 | { |
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88 | _particleSize = size; |
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89 | } |
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90 | |
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91 | float particleSize() const |
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92 | { |
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93 | return _particleSize; |
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94 | } |
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95 | |
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96 | static ParticleAdvectionShader *_advectionShader; |
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97 | |
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98 | private: |
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99 | void initializeDataArray(); |
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100 | |
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101 | void updateVertexBuffer(); |
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102 | |
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103 | /// frame buffer objects: two are defined, flip them as input output every step |
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104 | GLuint _psysFbo[2]; |
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105 | |
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106 | /// color textures attached to frame buffer objects |
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107 | GLuint _psysTex[2]; |
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108 | GLuint _initPosTex; |
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109 | Particle *_data; |
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110 | |
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111 | /// Count the frame number of particle system iteration |
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112 | unsigned int _psysFrame; |
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113 | |
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114 | /// Reinitiate particles |
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115 | bool _reborn; |
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116 | |
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117 | /// flip the source and destination render targets |
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118 | bool _flip; |
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119 | |
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120 | unsigned int _maxLife; |
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121 | |
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122 | /// Size of the particle: default is 1.2 |
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123 | float _particleSize; |
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124 | |
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125 | /// vertex array for display particles |
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126 | RenderVertexArray *_vertexArray; |
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127 | |
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128 | /// scale of flow data |
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129 | vrmath::Vector3f _scale; |
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130 | |
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131 | vrmath::Vector3f _origin; |
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132 | |
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133 | bool _activate; |
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134 | |
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135 | float _slicePos; |
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136 | FlowSliceAxis _sliceAxis; |
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137 | |
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138 | vrmath::Color4f _color; |
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139 | |
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140 | //the storage of particles is implemented as a 2D array. |
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141 | int _psysWidth; |
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142 | int _psysHeight; |
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143 | }; |
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144 | |
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145 | class ParticleAdvectionShaderInstance |
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146 | { |
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147 | public : |
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148 | ParticleAdvectionShaderInstance() |
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149 | {} |
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150 | |
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151 | ~ParticleAdvectionShaderInstance() |
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152 | { |
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153 | if (ParticleRenderer::_advectionShader) { |
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154 | delete ParticleRenderer::_advectionShader; |
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155 | } |
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156 | } |
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157 | }; |
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158 | |
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159 | } |
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160 | |
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161 | #endif |
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