[587] | 1 | /* |
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| 2 | * ---------------------------------------------------------------------- |
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| 3 | * NvLIC.h: line integral convolution 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_LIC_H_ |
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| 18 | #define _NV_LIC_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 "Vector3.h" |
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| 29 | #include "Volume.h" |
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| 30 | |
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| 31 | #define NPN 256 //resolution of background pattern |
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| 32 | #define NMESH 256 //resolution of flow mesh |
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| 33 | #define DM ((float) (1.0/(NMESH-1.0))) //distance in world coords between mesh lines |
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| 34 | #define NPIX 512 //display size |
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| 35 | #define SCALE 3.0 //scale for background pattern. small value -> fine texture |
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| 36 | |
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| 37 | class NvLIC : public Renderable { |
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| 38 | |
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| 39 | private: |
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| 40 | int width, height; |
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| 41 | int size; //the lic is a square of size, it can be stretched |
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| 42 | float* slice_vector; //storage for the per slice vectors driving the follow |
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| 43 | Vector3 scale; //scaling factor stretching the lic plane to fit the actual dimensions |
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| 44 | float offset; //[0,1] offset could be x, y, or z direction |
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| 45 | |
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| 46 | //some convolve variables. They can pretty much stay fixed |
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| 47 | int iframe; |
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| 48 | int Npat; |
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| 49 | int alpha; |
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| 50 | float sa; |
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| 51 | float tmax; |
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| 52 | float dmax; |
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| 53 | |
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| 54 | //CG shader parameters |
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| 55 | CGcontext m_g_context; |
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| 56 | CGparameter m_vel_tex_param; |
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| 57 | CGparameter m_vel_tex_param_render_vel, m_plane_normal_param_render_vel; |
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| 58 | CGprogram m_render_vel_fprog; |
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| 59 | |
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| 60 | NVISid color_tex, pattern_tex, mag_tex; |
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| 61 | NVISid fbo, vel_fbo, slice_vector_tex; //for projecting 3d vector to 2d vector on a plane |
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| 62 | |
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| 63 | Volume* vector_field; |
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| 64 | |
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| 65 | public: |
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| 66 | Vector3 normal; //the normal vector of the NvLIC plane, |
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| 67 | //the inherited Vector3 location is its center |
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| 68 | NvLIC(int _size, int _width, int _height, float _offset, |
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| 69 | CGcontext _context, NVISid _vector_field, |
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| 70 | float scalex, float scaley, float scalez); |
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| 71 | ~NvLIC(); |
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| 72 | |
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| 73 | void convolve(); |
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| 74 | void display(); //display the convolution result |
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| 75 | void render(); |
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| 76 | void make_patterns(); |
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| 77 | void make_magnitudes(); |
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| 78 | void get_velocity(float x, float y, float* px, float* py); |
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| 79 | void get_slice(); |
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| 80 | void set_offset(float v); |
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| 81 | |
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| 82 | }; |
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| 83 | |
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| 84 | #endif |
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