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 | * NvParticleRenderer.h: particle system class |
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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) 2004-2006 Purdue Research Foundation |
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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 NVPARTICLERENDERER_H |
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17 | #define NVPARTICLERENDERER_H |
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18 | |
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19 | #include <vector> |
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20 | |
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21 | #include <GL/glew.h> |
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22 | #include <Cg/cgGL.h> |
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23 | |
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24 | #include "define.h" |
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25 | #include "config.h" |
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26 | #include "global.h" |
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27 | |
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28 | #include "Renderable.h" |
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29 | #include "RenderVertexArray.h" |
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30 | #include "Vector3.h" |
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31 | #include "NvParticleAdvectionShader.h" |
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32 | |
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33 | struct Particle { |
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34 | float x; |
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35 | float y; |
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36 | float z; |
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37 | float aux; |
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38 | |
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39 | Particle() |
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40 | {} |
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41 | |
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42 | Particle(float _x, float _y, float _z, float _life) : |
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43 | x(_x), y(_y), z(_z), aux(_life) |
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44 | {} |
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45 | }; |
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46 | |
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47 | class NvParticleRenderer : public Renderable |
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48 | { |
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49 | public: |
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50 | NvParticleRenderer(int w, int h); |
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51 | |
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52 | ~NvParticleRenderer(); |
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53 | |
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54 | void setVectorField(unsigned int texID, const Vector3& ori, |
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55 | float scaleX, float scaleY, float scaleZ, float max); |
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56 | |
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57 | void initialize(); |
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58 | |
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59 | void advect(); |
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60 | |
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61 | void update_vertex_buffer(); |
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62 | |
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63 | void display_vertices(); |
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64 | |
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65 | void reset(); |
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66 | |
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67 | void render(); |
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68 | |
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69 | bool active() const |
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70 | { |
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71 | return _activate; |
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72 | } |
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73 | |
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74 | void active(bool state) |
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75 | { |
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76 | _activate = state; |
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77 | } |
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78 | |
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79 | void setColor(const Vector4& color) |
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80 | { |
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81 | _color = color; |
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82 | } |
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83 | |
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84 | void setAxis(int axis); |
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85 | |
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86 | void setPos(float pos); |
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87 | |
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88 | void draw_bounding_box(float x0, float y0, float z0, |
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89 | float x1, float y1, float z1, |
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90 | float r, float g, float b, float line_width); |
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91 | |
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92 | void initializeDataArray(); |
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93 | |
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94 | void particleSize(float size) |
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95 | { |
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96 | _particleSize = size; |
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97 | } |
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98 | |
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99 | float particleSize() const |
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100 | { |
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101 | return _particleSize; |
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102 | } |
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103 | |
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104 | static NvParticleAdvectionShader *_advectionShader; |
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105 | |
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106 | private: |
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107 | /// frame buffer objects: two are defined, flip them as input output every step |
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108 | GLuint psys_fbo[2]; |
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109 | |
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110 | /// color textures attached to frame buffer objects |
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111 | GLuint psys_tex[2]; |
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112 | GLuint initPosTex; |
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113 | Particle *data; |
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114 | |
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115 | /// Count the frame number of particle system iteration |
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116 | int psys_frame; |
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117 | |
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118 | /// Reinitiate particles |
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119 | bool reborn; |
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120 | |
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121 | /// flip the source and destination render targets |
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122 | bool flip; |
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123 | |
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124 | float max_life; |
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125 | |
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126 | /// Size of the particle: default is 1.2 |
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127 | float _particleSize; |
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128 | |
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129 | /// vertex array for display particles |
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130 | RenderVertexArray *_vertex_array; |
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131 | |
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132 | /// scale of flow data |
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133 | Vector3 scale; |
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134 | |
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135 | Vector3 origin; |
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136 | |
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137 | bool _activate; |
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138 | |
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139 | float _slice_pos; |
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140 | int _slice_axis; |
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141 | |
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142 | Vector4 _color; |
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143 | |
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144 | //the storage of particles is implemented as a 2D array. |
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145 | int psys_width; |
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146 | int psys_height; |
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147 | }; |
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148 | |
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149 | #endif |
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