14 |
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* in the +Z direction, towards the interior of the space rather |
15 |
|
* than the exterior. |
16 |
|
* |
17 |
< |
* BSDF vectors always oriented away from surface, even when "incident." |
17 |
> |
* BSDF incident & exiting vectors are always oriented away from surface. |
18 |
|
* |
19 |
|
* Created by Greg Ward on 1/10/11. |
20 |
|
* |
81 |
|
typedef const struct { |
82 |
|
/* return non-diffuse BSDF */ |
83 |
|
int (*getBSDFs)(float coef[SDmaxCh], const FVECT outVec, |
84 |
< |
const FVECT inVec, const void *dist); |
84 |
> |
const FVECT inVec, SDComponent *sdc); |
85 |
|
/* query non-diffuse PSA for vector */ |
86 |
|
SDError (*queryProjSA)(double *psa, const FVECT v1, |
87 |
|
const RREAL *v2, int qflags, |
88 |
< |
const void *dist); |
88 |
> |
SDComponent *sdc); |
89 |
|
/* get cumulative distribution */ |
90 |
|
const SDCDst *(*getCDist)(const FVECT inVec, SDComponent *sdc); |
91 |
|
/* sample cumulative distribution */ |
92 |
< |
SDError (*sampCDist)(FVECT outVec, double randX, |
92 |
> |
SDError (*sampCDist)(FVECT ioVec, double randX, |
93 |
|
const SDCDst *cdp); |
94 |
|
/* free a spectral BSDF component */ |
95 |
|
void (*freeSC)(void *dist); |
113 |
|
|
114 |
|
/* Loaded BSDF data */ |
115 |
|
typedef struct { |
116 |
< |
char name[SDnameLn]; /* BSDF name (derived from file) */ |
116 |
> |
char name[SDnameLn]; /* BSDF name (usu. derived from file) */ |
117 |
|
char *mgf; /* geometric description (if any) */ |
118 |
|
float dim[3]; /* width, height, thickness (meters) */ |
119 |
|
SDValue rLambFront; /* diffuse front reflectance */ |
130 |
|
*next; |
131 |
|
} *SDcacheList; /* Global BSDF cache */ |
132 |
|
|
133 |
< |
/* BSDF cache retention preference */ |
134 |
< |
#define SDretainNone 0 /* free unreferenced data (default) */ |
135 |
< |
#define SDretainBSDFs 1 /* keep loaded BSDFs in cache */ |
133 |
> |
/* BSDF cache retention policies */ |
134 |
> |
#define SDretainNone 0 /* free unreferenced BSDF data */ |
135 |
> |
#define SDretainBSDFs 1 /* keep loaded BSDFs in memory */ |
136 |
|
#define SDretainAll 2 /* also keep cumulative cache data */ |
137 |
|
|
138 |
< |
extern int SDretainSet; /* set to SDretainNone by default */ |
138 |
> |
extern int SDretainSet; /* =SDretainNone by default */ |
139 |
|
|
140 |
|
/***************************************************************** |
141 |
|
* The following routines are less commonly used by applications. |
171 |
|
extern void SDfreeCumulativeCache(SDSpectralDF *df); |
172 |
|
|
173 |
|
/* Sample an individual BSDF component */ |
174 |
< |
extern SDError SDsampComponent(SDValue *sv, FVECT outVec, |
175 |
< |
const FVECT inVec, double randX, |
176 |
< |
SDComponent *sdc); |
174 |
> |
extern SDError SDsampComponent(SDValue *sv, FVECT ioVec, |
175 |
> |
double randX, SDComponent *sdc); |
176 |
|
|
177 |
|
/* Convert 1-dimensional random variable to N-dimensional */ |
178 |
|
extern void SDmultiSamp(double t[], int n, double randX); |
189 |
|
*/ |
190 |
|
|
191 |
|
/* Get BSDF from cache (or load and cache it on first call) */ |
192 |
< |
/* Report any problems to stderr and return NULL on failure */ |
192 |
> |
/* Report any problems to stderr (in English), return NULL on failure */ |
193 |
|
extern const SDData *SDcacheFile(const char *fname); |
194 |
|
|
195 |
< |
/* Free a BSDF from our cache (clear all if NULL) */ |
195 |
> |
/* Free a BSDF from our cache (clear all if sd==NULL) */ |
196 |
|
extern void SDfreeCache(const SDData *sd); |
197 |
|
|
198 |
|
/* Query projected solid angle resolution for non-diffuse BSDF direction(s) */ |
209 |
|
int sflags, const SDData *sd); |
210 |
|
|
211 |
|
/* Sample BSDF direction based on the given random variable */ |
212 |
< |
extern SDError SDsampBSDF(SDValue *sv, FVECT outVec, |
214 |
< |
const FVECT inVec, double randX, |
212 |
> |
extern SDError SDsampBSDF(SDValue *sv, FVECT ioVec, double randX, |
213 |
|
int sflags, const SDData *sd); |
214 |
|
|
215 |
|
/***************************************************************** |
217 |
|
* Directions may be passed unnormalized to these routines. |
218 |
|
*/ |
219 |
|
|
220 |
< |
/* Compute World->BSDF transform from surface normal and up (Y) vector */ |
220 |
> |
/* Compute World->BSDF transform from surface normal and BSDF up vector */ |
221 |
|
extern SDError SDcompXform(RREAL vMtx[3][3], const FVECT sNrm, |
222 |
|
const FVECT uVec); |
223 |
|
|
228 |
|
extern SDError SDmapDir(FVECT resVec, RREAL vMtx[3][3], |
229 |
|
const FVECT inpVec); |
230 |
|
|
231 |
< |
/* System-specific BSDF loading routine (not part of our library) */ |
231 |
> |
/* Application-specific BSDF loading routine (not part of our library) */ |
232 |
|
extern SDData *loadBSDF(char *name); |
233 |
|
|
234 |
< |
/* System-specific BSDF error translator (not part of our library) */ |
234 |
> |
/* Application-specific BSDF error translator (not part of our library) */ |
235 |
|
extern char *transSDError(SDError ec); |
236 |
|
|
237 |
|
/*################################################################*/ |