| 1 | /*
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| 2 | * ----------------------------------------------------------------------
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| 3 | * ParticleSystem.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 _PARTICLE_SYSTEM_H_
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| 18 | #define _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 "RenderVertexArray.h"
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| 28 |
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| 29 | typedef struct Particle{
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| 30 | float x;
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| 31 | float y;
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| 32 | float z;
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| 33 | float aux;
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| 34 |
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| 35 | Particle(){};
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| 36 | Particle(float _x, float _y, float _z, float _life) :
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| 37 | x(_x), y(_y), z(_z), aux(_life){}
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| 38 | };
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| 39 |
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| 40 |
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| 41 | class ParticleSystem{
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| 42 |
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| 43 | NVISid psys_fbo[2]; //frame buffer objects: two are defined, flip them as input output every step
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| 44 | NVISid psys_tex[2]; //color textures attached to frame buffer objects
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| 45 |
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| 46 | Particle* data;
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| 47 |
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| 48 | int psys_frame; //count the frame number of particle system iteration
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| 49 | bool reborn; //reinitiate particles
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| 50 | bool flip; //flip the source and destination render targets
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| 51 | float max_life;
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| 52 |
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| 53 | RenderVertexArray* m_vertex_array; //vertex array for display particles
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| 54 |
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| 55 | //Nvidia CG shaders and their parameters
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| 56 | CGcontext m_g_context;
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| 57 | CGprogram m_pos_fprog;
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| 58 | CGparameter m_vel_tex_param, m_pos_tex_param, m_scale_param;
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| 59 | CGparameter m_pos_timestep_param, m_pos_spherePos_param;
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| 60 |
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| 61 | public:
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| 62 | int psys_width; //the storage of particles is implemented as a 2D array.
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| 63 | int psys_height;
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| 64 |
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| 65 | ParticleSystem(int w, int h, CGcontext context, NVISid vector_field,
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| 66 | float scalex, float scaley, float scalez);
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| 67 | ~ParticleSystem();
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| 68 | void initialize(Particle* data);
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| 69 | void advect();
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| 70 | void update_vertex_buffer();
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| 71 | void display_vertices();
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| 72 | void reset();
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| 73 |
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| 74 | };
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| 75 |
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| 76 |
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| 77 | #endif
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