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#ifndef _FLUIDS_H
#define _FLUIDS_H
//--- SIMULATION PARAMETERS ------------------------------------------------------------------------
extern double dt; //simulation time step
extern float visc; //fluid viscosity
extern fftw_real *vx, *vy; //(vx,vy) = velocity field at the current moment
extern fftw_real *fx, *fy; //(fx,fy) = user-controlled simulation forces, steered with the mouse
extern fftw_real *rho; //smoke density at the current (rho) and previous (rho0) moment
extern rfftwnd_plan plan_rc, plan_cr; //simulation domain discretization
extern fftw_real *height_array; //used for hight plot
struct point *normal_array; //used for normal vectors
extern int *frame_hist;
extern int frame_index;
//--- VISUALIZATION PARAMETERS ---------------------------------------------------------------------
#define DATASET_RHO 0
#define DATASET_VEL 1
#define DATASET_FORCE 2
#define DATASET_DIVV 3
#define DATASET_DIVF 4
#define DATASET_HIST 5
#define SCALAR_RHO 0
#define SCALAR_VEL 1
#define SCALAR_FORCE 2
#define VECTOR_VEL 0
#define VECTOR_FORCE 1
#define HISTORY_SIZE 80
extern int winWidth, winHeight; //size of the graphics window, in pixels
extern int color_dir; //use direction color-coding or not
extern float vec_scale; //scaling of hedgehogs
extern int vis_dataset;
extern int glyph_scalar;
extern int glyph_vector;
//////////////////
void select_dataset(int arg);
void set_glyph_scalar(int arg);
void set_glyph_vector(int arg);
int fluids_get_var_dim(void);
void fluids_set_var_dim(int);
struct point {
float x;
float y;
float z;
};
struct scalar_frame {
fftw_real *x;
fftw_real *y;
};
struct scalar_history {
fftw_real *x[HISTORY_SIZE];
fftw_real *y[HISTORY_SIZE];
};
struct vis_data_arrays {
fftw_real *rho;
fftw_real *vel;
fftw_real *force;
struct scalar_frame frame;
fftw_real *div_vel;
fftw_real *div_force;
fftw_real *height;
struct point *normals;
fftw_real *frame_history[HISTORY_SIZE];
struct scalar_history history;
};
extern int active_slider;
void fluids_set_calculate(int calculate);
int fluids_get_calculate(void);
void fluids_insert_smoke(int x, int y);
int fluids_get_dim(void);
void fluids_init_simulation(int n, struct vis_data_arrays *vis_data);
void fluids_reset_simulation(void);
void fluids_calculate_one_simulation_step(struct vis_data_arrays *vis_data);
int fluids_get_hisdex(void);
#endif
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