1 | /* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */ |
---|
2 | /* |
---|
3 | * Copyright (c) 2004-2013 HUBzero Foundation, LLC |
---|
4 | * |
---|
5 | * Authors: |
---|
6 | * Wei Qiao <qiaow@purdue.edu> |
---|
7 | */ |
---|
8 | #ifndef NV_PARTICLE_RENDERER_H |
---|
9 | #define NV_PARTICLE_RENDERER_H |
---|
10 | |
---|
11 | #include <GL/glew.h> |
---|
12 | |
---|
13 | #include <vrmath/Vector3f.h> |
---|
14 | #include <vrmath/Color4f.h> |
---|
15 | |
---|
16 | #include "ParticleAdvectionShader.h" |
---|
17 | #include "RenderVertexArray.h" |
---|
18 | |
---|
19 | namespace nv { |
---|
20 | |
---|
21 | struct Particle { |
---|
22 | float x; |
---|
23 | float y; |
---|
24 | float z; |
---|
25 | float aux; |
---|
26 | |
---|
27 | Particle() |
---|
28 | {} |
---|
29 | |
---|
30 | Particle(float _x, float _y, float _z, float _life) : |
---|
31 | x(_x), y(_y), z(_z), aux(_life) |
---|
32 | {} |
---|
33 | }; |
---|
34 | |
---|
35 | class ParticleRenderer |
---|
36 | { |
---|
37 | public: |
---|
38 | ParticleRenderer(int w, int h); |
---|
39 | |
---|
40 | ~ParticleRenderer(); |
---|
41 | |
---|
42 | void setVectorField(unsigned int texID, const vrmath::Vector3f& origin, |
---|
43 | float scaleX, float scaleY, float scaleZ, float max); |
---|
44 | |
---|
45 | void initialize(); |
---|
46 | |
---|
47 | void advect(); |
---|
48 | |
---|
49 | void updateVertexBuffer(); |
---|
50 | |
---|
51 | void reset(); |
---|
52 | |
---|
53 | void render(); |
---|
54 | |
---|
55 | bool active() const |
---|
56 | { |
---|
57 | return _activate; |
---|
58 | } |
---|
59 | |
---|
60 | void active(bool state) |
---|
61 | { |
---|
62 | _activate = state; |
---|
63 | } |
---|
64 | |
---|
65 | void setColor(const vrmath::Color4f& color) |
---|
66 | { |
---|
67 | _color = color; |
---|
68 | } |
---|
69 | |
---|
70 | void setAxis(int axis); |
---|
71 | |
---|
72 | void setPos(float pos); |
---|
73 | |
---|
74 | void initializeDataArray(); |
---|
75 | |
---|
76 | void particleSize(float size) |
---|
77 | { |
---|
78 | _particleSize = size; |
---|
79 | } |
---|
80 | |
---|
81 | float particleSize() const |
---|
82 | { |
---|
83 | return _particleSize; |
---|
84 | } |
---|
85 | |
---|
86 | static ParticleAdvectionShader *_advectionShader; |
---|
87 | |
---|
88 | private: |
---|
89 | /// frame buffer objects: two are defined, flip them as input output every step |
---|
90 | GLuint _psysFbo[2]; |
---|
91 | |
---|
92 | /// color textures attached to frame buffer objects |
---|
93 | GLuint _psysTex[2]; |
---|
94 | GLuint _initPosTex; |
---|
95 | Particle *_data; |
---|
96 | |
---|
97 | /// Count the frame number of particle system iteration |
---|
98 | int _psysFrame; |
---|
99 | |
---|
100 | /// Reinitiate particles |
---|
101 | bool _reborn; |
---|
102 | |
---|
103 | /// flip the source and destination render targets |
---|
104 | bool _flip; |
---|
105 | |
---|
106 | float _maxLife; |
---|
107 | |
---|
108 | /// Size of the particle: default is 1.2 |
---|
109 | float _particleSize; |
---|
110 | |
---|
111 | /// vertex array for display particles |
---|
112 | RenderVertexArray *_vertexArray; |
---|
113 | |
---|
114 | /// scale of flow data |
---|
115 | vrmath::Vector3f _scale; |
---|
116 | |
---|
117 | vrmath::Vector3f _origin; |
---|
118 | |
---|
119 | bool _activate; |
---|
120 | |
---|
121 | float _slicePos; |
---|
122 | int _sliceAxis; |
---|
123 | |
---|
124 | vrmath::Color4f _color; |
---|
125 | |
---|
126 | //the storage of particles is implemented as a 2D array. |
---|
127 | int _psysWidth; |
---|
128 | int _psysHeight; |
---|
129 | }; |
---|
130 | |
---|
131 | class ParticleAdvectionShaderInstance |
---|
132 | { |
---|
133 | public : |
---|
134 | ParticleAdvectionShaderInstance() |
---|
135 | {} |
---|
136 | |
---|
137 | ~ParticleAdvectionShaderInstance() |
---|
138 | { |
---|
139 | if (ParticleRenderer::_advectionShader) { |
---|
140 | delete ParticleRenderer::_advectionShader; |
---|
141 | } |
---|
142 | } |
---|
143 | }; |
---|
144 | |
---|
145 | } |
---|
146 | |
---|
147 | #endif |
---|