| 17 |
|
#define IL_COLAVG 0x4 /* use average color */ |
| 18 |
|
#define IL_DATCLB 0x8 /* OK to clobber data file */ |
| 19 |
|
|
| 20 |
+ |
/* up directions */ |
| 21 |
+ |
typedef enum { |
| 22 |
+ |
UDzneg=-3, |
| 23 |
+ |
UDyneg=-2, |
| 24 |
+ |
UDxneg=-1, |
| 25 |
+ |
UDunknown=0, |
| 26 |
+ |
UDxpos=1, |
| 27 |
+ |
UDypos=2, |
| 28 |
+ |
UDzpos=3 |
| 29 |
+ |
} UpDir; |
| 30 |
+ |
/* BSDF coordinate calculation routines */ |
| 31 |
+ |
/* vectors always point away from surface */ |
| 32 |
+ |
typedef int b_vecf(FVECT, int, char *); |
| 33 |
+ |
typedef int b_ndxf(FVECT, char *); |
| 34 |
+ |
typedef double b_radf(int, char *); |
| 35 |
+ |
|
| 36 |
+ |
/* Bidirectional Scattering Distribution Function */ |
| 37 |
+ |
struct BSDF_data { |
| 38 |
+ |
int ninc; /* number of incoming directions */ |
| 39 |
+ |
int nout; /* number of outgoing directions */ |
| 40 |
+ |
char ib_priv[32]; /* input basis private data */ |
| 41 |
+ |
b_vecf *ib_vec; /* get input vector from index */ |
| 42 |
+ |
b_ndxf *ib_ndx; /* get input index from vector */ |
| 43 |
+ |
b_radf *ib_rad; /* get input radius for index */ |
| 44 |
+ |
char ob_priv[32]; /* output basis private data */ |
| 45 |
+ |
b_vecf *ob_vec; /* get output vector from index */ |
| 46 |
+ |
b_ndxf *ob_ndx; /* get output index from vector */ |
| 47 |
+ |
b_radf *ob_rad; /* get output radius for index */ |
| 48 |
+ |
float *bsdf; /* scattering distribution data */ |
| 49 |
+ |
}; /* bidirectional scattering distrib. func. */ |
| 50 |
+ |
|
| 51 |
|
struct illum_args { |
| 52 |
|
int flags; /* flags from list above */ |
| 53 |
+ |
UpDir udir; /* up direction */ |
| 54 |
+ |
double thick; /* object thickness */ |
| 55 |
|
char matname[MAXSTR]; /* illum material name */ |
| 56 |
|
char datafile[MAXSTR]; /* distribution data file name */ |
| 57 |
|
int dfnum; /* data file number */ |
| 58 |
|
char altmat[MAXSTR]; /* alternate material name */ |
| 59 |
|
int sampdens; /* point sample density */ |
| 60 |
|
int nsamps; /* # of samples in each direction */ |
| 61 |
+ |
struct BSDF_data |
| 62 |
+ |
*sd; /* scattering data (if set) */ |
| 63 |
|
float minbrt; /* minimum average brightness */ |
| 64 |
< |
float col[3]; /* computed average color */ |
| 64 |
> |
COLOR col; /* computed average color */ |
| 65 |
|
}; /* illum options */ |
| 66 |
|
|
| 67 |
< |
extern void printobj(char *mod, register OBJREC *obj); |
| 68 |
< |
extern int average(register struct illum_args *il, float *da, int n); |
| 69 |
< |
extern void flatout(struct illum_args *il, float *da, int n, int m, |
| 70 |
< |
FVECT u, FVECT v, FVECT w); |
| 71 |
< |
extern void illumout(register struct illum_args *il, OBJREC *ob); |
| 72 |
< |
extern void roundout(struct illum_args *il, float *da, int n, int m); |
| 67 |
> |
#define getBSDF_incvec(v,b,i) (*(b)->ib_vec)(v,i,(b)->ib_priv) |
| 68 |
> |
#define getBSDF_incndx(b,v) (*(b)->ib_ndx)(v,(b)->ib_priv) |
| 69 |
> |
#define getBSDF_incrad(b,i) (*(b)->ib_rad)(i,(b)->ib_priv) |
| 70 |
> |
#define getBSDF_outvec(v,b,o) (*(b)->ob_vec)(v,o,(b)->ob_priv) |
| 71 |
> |
#define getBSDF_outndx(b,v) (*(b)->ob_ndx)(v,(b)->ob_priv) |
| 72 |
> |
#define getBSDF_outrad(b,o) (*(b)->ob_rad)(o,(b)->ob_priv) |
| 73 |
> |
#define BSDF_visible(b,i,o) (b)->bsdf[(o)*(b)->ninc + (i)] |
| 74 |
|
|
| 75 |
+ |
extern struct BSDF_data *load_BSDF(char *fname); |
| 76 |
+ |
extern void free_BSDF(struct BSDF_data *b); |
| 77 |
+ |
extern void r_BSDF_incvec(FVECT v, struct BSDF_data *b, int i, |
| 78 |
+ |
double rv, MAT4 xm); |
| 79 |
+ |
extern void r_BSDF_outvec(FVECT v, struct BSDF_data *b, int o, |
| 80 |
+ |
double rv, MAT4 xm); |
| 81 |
+ |
extern int getBSDF_xfm(MAT4 xm, FVECT nrm, UpDir ud); |
| 82 |
+ |
extern void redistribute(struct BSDF_data *b, int nalt, int nazi, |
| 83 |
+ |
FVECT u, FVECT v, FVECT w, MAT4 xm); |
| 84 |
+ |
|
| 85 |
+ |
extern void printobj(char *mod, OBJREC *obj); |
| 86 |
+ |
extern int average(struct illum_args *il, COLORV *da, int n); |
| 87 |
+ |
extern void flatout(struct illum_args *il, COLORV *da, int n, int m, |
| 88 |
+ |
FVECT u, FVECT v, FVECT w); |
| 89 |
+ |
extern void illumout(struct illum_args *il, OBJREC *ob); |
| 90 |
+ |
extern void roundout(struct illum_args *il, COLORV *da, int n, int m); |
| 91 |
+ |
|
| 92 |
+ |
extern void newdist(int siz); |
| 93 |
+ |
extern int process_ray(RAY *r, int rv); |
| 94 |
+ |
extern void raysamp(int ndx, FVECT org, FVECT dir); |
| 95 |
+ |
extern void rayclean(void); |
| 96 |
+ |
|
| 97 |
+ |
extern void flatdir(FVECT dv, double alt, double azi); |
| 98 |
+ |
|
| 99 |
|
extern int my_default(OBJREC *, struct illum_args *, char *); |
| 100 |
|
extern int my_face(OBJREC *, struct illum_args *, char *); |
| 101 |
|
extern int my_sphere(OBJREC *, struct illum_args *, char *); |
| 102 |
|
extern int my_ring(OBJREC *, struct illum_args *, char *); |
| 103 |
+ |
|
| 104 |
+ |
extern COLORV * distarr; /* distribution array */ |
| 105 |
+ |
extern int distsiz; |
| 106 |
|
|
| 107 |
|
extern char *progname; |
| 108 |
|
|
