| 78 |
|
/* ...encoded distribution extends struct */ |
| 79 |
|
} SDCDst; |
| 80 |
|
|
| 81 |
+ |
extern const SDCDst SDemptyCD; /* empty distribution */ |
| 82 |
+ |
|
| 83 |
|
/* Forward declaration of BSDF component */ |
| 84 |
|
typedef struct SDComp_s SDComponent; |
| 85 |
|
|
| 127 |
|
SDValue rLambFront; /* diffuse front reflectance */ |
| 128 |
|
SDValue rLambBack; /* diffuse rear reflectance */ |
| 129 |
|
SDValue tLamb; /* diffuse transmission */ |
| 130 |
< |
SDSpectralDF *rf, *rb, *tf; /* non-diffuse BSDF components */ |
| 130 |
> |
SDSpectralDF *rf, *rb; /* non-diffuse BRDF components */ |
| 131 |
> |
SDSpectralDF *tf, *tb; /* non-diffuse BTDF components */ |
| 132 |
|
} SDData; |
| 133 |
|
|
| 134 |
|
/* List of loaded BSDFs */ |
| 245 |
|
|
| 246 |
|
/* Application-specific BSDF error translator (not part of our library) */ |
| 247 |
|
extern char *transSDError(SDError ec); |
| 245 |
– |
|
| 246 |
– |
/*################################################################*/ |
| 247 |
– |
/*######### DEPRECATED DEFINITIONS AWAITING PERMANENT REMOVAL #######*/ |
| 248 |
– |
/* |
| 249 |
– |
* Header for BSDF i/o and access routines |
| 250 |
– |
*/ |
| 251 |
– |
|
| 252 |
– |
#include "mat4.h" |
| 253 |
– |
/* up directions */ |
| 254 |
– |
typedef enum { |
| 255 |
– |
UDzneg=-3, |
| 256 |
– |
UDyneg=-2, |
| 257 |
– |
UDxneg=-1, |
| 258 |
– |
UDunknown=0, |
| 259 |
– |
UDxpos=1, |
| 260 |
– |
UDypos=2, |
| 261 |
– |
UDzpos=3 |
| 262 |
– |
} UpDir; |
| 263 |
– |
/* BSDF coordinate calculation routines */ |
| 264 |
– |
/* vectors always point away from surface */ |
| 265 |
– |
|
| 266 |
– |
typedef int b_vecf2(FVECT v, int n, void *cd); |
| 267 |
– |
typedef int b_ndxf2(FVECT v, void *cd); |
| 268 |
– |
typedef double b_radf2(int n, void *cd); |
| 269 |
– |
|
| 270 |
– |
/* Bidirectional Scattering Distribution Function */ |
| 271 |
– |
struct BSDF_data { |
| 272 |
– |
int ninc; /* number of incoming directions */ |
| 273 |
– |
int nout; /* number of outgoing directions */ |
| 274 |
– |
float dim[3]; /* width, height, thickness (meters) */ |
| 275 |
– |
char *mgf; /* geometric description (if any) */ |
| 276 |
– |
void *ib_priv; /* input basis private data */ |
| 277 |
– |
b_vecf2 *ib_vec; /* get input vector from index */ |
| 278 |
– |
b_ndxf2 *ib_ndx; /* get input index from vector */ |
| 279 |
– |
b_radf2 *ib_ohm; /* get input radius for index */ |
| 280 |
– |
void *ob_priv; /* output basis private data */ |
| 281 |
– |
b_vecf2 *ob_vec; /* get output vector from index */ |
| 282 |
– |
b_ndxf2 *ob_ndx; /* get output index from vector */ |
| 283 |
– |
b_radf2 *ob_ohm; /* get output radius for index */ |
| 284 |
– |
float *bsdf; /* scattering distribution data */ |
| 285 |
– |
}; /* bidirectional scattering distrib. func. */ |
| 286 |
– |
|
| 287 |
– |
#define getBSDF_incvec(v,b,i) (*(b)->ib_vec)(v,i,(b)->ib_priv) |
| 288 |
– |
#define getBSDF_incndx(b,v) (*(b)->ib_ndx)(v,(b)->ib_priv) |
| 289 |
– |
#define getBSDF_incohm(b,i) (*(b)->ib_ohm)(i,(b)->ib_priv) |
| 290 |
– |
#define getBSDF_outvec(v,b,o) (*(b)->ob_vec)(v,o,(b)->ob_priv) |
| 291 |
– |
#define getBSDF_outndx(b,v) (*(b)->ob_ndx)(v,(b)->ob_priv) |
| 292 |
– |
#define getBSDF_outohm(b,o) (*(b)->ob_ohm)(o,(b)->ob_priv) |
| 293 |
– |
#define BSDF_value(b,i,o) (b)->bsdf[(o)*(b)->ninc + (i)] |
| 294 |
– |
|
| 295 |
– |
extern struct BSDF_data *load_BSDF(char *fname); |
| 296 |
– |
extern void free_BSDF(struct BSDF_data *b); |
| 297 |
– |
extern int r_BSDF_incvec(FVECT v, struct BSDF_data *b, int i, |
| 298 |
– |
double rv, MAT4 xm); |
| 299 |
– |
extern int r_BSDF_outvec(FVECT v, struct BSDF_data *b, int o, |
| 300 |
– |
double rv, MAT4 xm); |
| 301 |
– |
extern int getBSDF_xfm(MAT4 xm, FVECT nrm, UpDir ud, char *xfbuf); |
| 302 |
– |
|
| 303 |
– |
/*######### END DEPRECATED DEFINITIONS #######*/ |
| 304 |
– |
/*################################################################*/ |
| 248 |
|
|
| 249 |
|
#ifdef __cplusplus |
| 250 |
|
} |
