1 | /*
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2 | * ----------------------------------------------------------------------
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3 | * NvParticleRenderer.h: particle system class
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4 | *
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5 | * ======================================================================
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6 | * AUTHOR: Wei Qiao <qiaow@purdue.edu>
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7 | * Purdue Rendering and Perceptualization Lab (PURPL)
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8 | *
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9 | * Copyright (c) 2004-2006 Purdue Research Foundation
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10 | *
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11 | * See the file "license.terms" for information on usage and
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12 | * redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
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13 | * ======================================================================
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14 | */
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15 |
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16 |
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17 | #ifndef _NV_PARTICLE_SYSTEM_H_
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18 | #define _NV_PARTICLE_SYSTEM_H_
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19 |
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20 | #include "GL/glew.h"
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21 | #include "Cg/cgGL.h"
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22 |
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23 | #include "define.h"
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24 | #include "config.h"
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25 | #include "global.h"
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26 |
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27 | #include "Renderable.h"
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28 | #include "RenderVertexArray.h"
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29 | #include "Vector3.h"
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30 |
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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 | Particle(float _x, float _y, float _z, float _life) :
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41 | x(_x), y(_y), z(_z), aux(_life){}
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42 | };
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43 |
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44 |
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45 | class NvParticleRenderer : public Renderable {
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46 | public :
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47 | /**
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48 | * @brief frame buffer objects: two are defined, flip them as input output every step
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49 | */
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50 | NVISid psys_fbo[2];
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51 |
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52 | /**
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53 | * @brief color textures attached to frame buffer objects
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54 | */
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55 | NVISid psys_tex[2];
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56 |
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57 | Particle* data;
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58 |
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59 | /**
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60 | *@brief Count the frame number of particle system iteration
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61 | */
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62 | int psys_frame;
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63 |
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64 | /**
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65 | * @brief Reinitiate particles
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66 | */
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67 | bool reborn;
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68 |
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69 | /**
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70 | * @brief flip the source and destination render targets
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71 | */
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72 | bool flip;
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73 |
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74 | float max_life;
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75 |
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76 | /**
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77 | * @brief vertex array for display particles
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78 | */
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79 | RenderVertexArray* m_vertex_array;
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80 |
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81 | //Nvidia CG shaders and their parameters
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82 | /*
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83 | CGcontext m_g_context;
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84 | CGprogram m_pos_fprog;
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85 | CGparameter m_vel_tex_param, m_pos_tex_param, m_scale_param;
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86 | CGparameter m_pos_timestep_param, m_pos_spherePos_param;
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87 | */
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88 | NvParticleAdvectionShader* _advectionShader;
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89 |
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90 | /**
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91 | * @brief scale of flow data
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92 | */
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93 | Vector3 scale;
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94 |
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95 | bool _activate;
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96 | public:
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97 | int psys_width; //the storage of particles is implemented as a 2D array.
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98 | int psys_height;
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99 |
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100 | NvParticleRenderer(int w, int h, CGcontext context);
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101 | ~NvParticleRenderer();
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102 | void setVectorField(unsigned int texID, float scaleX, float scaleY, float scaleZ, float max);
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103 | void initialize(Particle* data);
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104 | void advect();
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105 | void update_vertex_buffer();
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106 | void display_vertices();
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107 | void reset();
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108 | void render();
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109 |
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110 | void activate();
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111 | void deactivate();
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112 | bool isActivated() const;
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113 | };
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114 |
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115 | inline void NvParticleRenderer::activate()
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116 | {
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117 | _activate = true;
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118 | }
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119 |
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120 | inline void NvParticleRenderer::deactivate()
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121 | {
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122 | _activate = false;
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123 | }
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124 |
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125 | inline bool NvParticleRenderer::isActivated() const
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126 | {
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127 | return _activate;
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128 | }
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129 |
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130 | #endif
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