| 8 |
|
#include "copyright.h" |
| 9 |
|
|
| 10 |
|
#include "ray.h" |
| 11 |
< |
|
| 11 |
> |
#include "paths.h" |
| 12 |
|
#include "otypes.h" |
| 13 |
– |
|
| 13 |
|
#include "func.h" |
| 14 |
+ |
#include <ctype.h> |
| 15 |
|
|
| 16 |
|
|
| 17 |
|
#define INITFILE "rayinit.cal" |
| 31 |
|
static OBJREC *fobj = NULL; /* current function object */ |
| 32 |
|
static RAY *fray = NULL; /* current function ray */ |
| 33 |
|
|
| 34 |
< |
static double l_erf(), l_erfc(), l_arg(); |
| 34 |
> |
static char rayinitcal[] = INITFILE; |
| 35 |
|
|
| 36 |
+ |
static double l_erf(char *), l_erfc(char *), l_arg(char *); |
| 37 |
|
|
| 38 |
+ |
|
| 39 |
+ |
void |
| 40 |
+ |
initfunc(void) /* initialize function evaluation */ |
| 41 |
+ |
{ |
| 42 |
+ |
if (!rayinitcal[0]) /* already done? */ |
| 43 |
+ |
return; |
| 44 |
+ |
esupport |= E_VARIABLE|E_FUNCTION|E_INCHAN|E_RCONST|E_REDEFW; |
| 45 |
+ |
esupport &= ~(E_OUTCHAN); |
| 46 |
+ |
calcontext(""); |
| 47 |
+ |
scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0); |
| 48 |
+ |
scompile("Nx=$4;Ny=$5;Nz=$6;", NULL, 0); |
| 49 |
+ |
scompile("Px=$7;Py=$8;Pz=$9;", NULL, 0); |
| 50 |
+ |
scompile("T=$10;Ts=$25;Rdot=$11;", NULL, 0); |
| 51 |
+ |
scompile("S=$12;Tx=$13;Ty=$14;Tz=$15;", NULL, 0); |
| 52 |
+ |
scompile("Ix=$16;Iy=$17;Iz=$18;", NULL, 0); |
| 53 |
+ |
scompile("Jx=$19;Jy=$20;Jz=$21;", NULL, 0); |
| 54 |
+ |
scompile("Kx=$22;Ky=$23;Kz=$24;", NULL, 0); |
| 55 |
+ |
scompile("Lu=$26;Lv=$27;", NULL, 0); |
| 56 |
+ |
funset("arg", 1, '=', l_arg); |
| 57 |
+ |
funset("erf", 1, ':', l_erf); |
| 58 |
+ |
funset("erfc", 1, ':', l_erfc); |
| 59 |
+ |
setnoisefuncs(); |
| 60 |
+ |
setprismfuncs(); |
| 61 |
+ |
loadfunc(rayinitcal); |
| 62 |
+ |
rayinitcal[0] = '\0'; |
| 63 |
+ |
} |
| 64 |
+ |
|
| 65 |
+ |
|
| 66 |
+ |
/* Set parameters for current evaluation */ |
| 67 |
+ |
void |
| 68 |
+ |
set_eparams(char *prms) |
| 69 |
+ |
{ |
| 70 |
+ |
static char *last_params = NULL; |
| 71 |
+ |
char vname[RMAXWORD]; |
| 72 |
+ |
double value; |
| 73 |
+ |
char *cpd; |
| 74 |
+ |
/* check if already set */ |
| 75 |
+ |
if (prms == NULL || !*prms) |
| 76 |
+ |
return; |
| 77 |
+ |
if (prms == last_params || (last_params != NULL && |
| 78 |
+ |
!strcmp(prms, last_params))) |
| 79 |
+ |
return; |
| 80 |
+ |
last_params = prms; /* XXX assumes static string */ |
| 81 |
+ |
/* assign each variable */ |
| 82 |
+ |
while (*prms) { |
| 83 |
+ |
if (isspace(*prms)) { |
| 84 |
+ |
++prms; continue; |
| 85 |
+ |
} |
| 86 |
+ |
if (!isalpha(*prms)) |
| 87 |
+ |
goto bad_params; |
| 88 |
+ |
cpd = vname; |
| 89 |
+ |
while (*prms && (*prms != '=') & !isspace(*prms)) { |
| 90 |
+ |
if (!isid(*prms) | (cpd-vname >= RMAXWORD-1)) |
| 91 |
+ |
goto bad_params; |
| 92 |
+ |
*cpd++ = *prms++; |
| 93 |
+ |
} |
| 94 |
+ |
*cpd = '\0'; |
| 95 |
+ |
while (isspace(*prms)) prms++; |
| 96 |
+ |
if (*prms++ != '=') |
| 97 |
+ |
goto bad_params; |
| 98 |
+ |
value = atof(prms); |
| 99 |
+ |
if ((prms = fskip(prms)) == NULL) |
| 100 |
+ |
goto bad_params; |
| 101 |
+ |
while (isspace(*prms)) prms++; |
| 102 |
+ |
prms += (*prms == ',') | (*prms == ';') | (*prms == ':'); |
| 103 |
+ |
varset(vname, '=', value); |
| 104 |
+ |
} |
| 105 |
+ |
eclock++; /* notify expression evaluator */ |
| 106 |
+ |
return; |
| 107 |
+ |
bad_params: |
| 108 |
+ |
sprintf(errmsg, "bad parameter list '%s'", last_params); |
| 109 |
+ |
error(USER, errmsg); |
| 110 |
+ |
} |
| 111 |
+ |
|
| 112 |
+ |
|
| 113 |
|
MFUNC * |
| 114 |
< |
getfunc(m, ff, ef, dofwd) /* get function for this modifier */ |
| 115 |
< |
OBJREC *m; |
| 116 |
< |
int ff; |
| 117 |
< |
unsigned int ef; |
| 118 |
< |
int dofwd; |
| 114 |
> |
getfunc( /* get function for this modifier */ |
| 115 |
> |
OBJREC *m, |
| 116 |
> |
int ff, |
| 117 |
> |
unsigned int ef, |
| 118 |
> |
int dofwd |
| 119 |
> |
) |
| 120 |
|
{ |
| 44 |
– |
static char initfile[] = INITFILE; |
| 121 |
|
char sbuf[MAXSTR]; |
| 122 |
< |
register char **arg; |
| 123 |
< |
register MFUNC *f; |
| 122 |
> |
char **arg; |
| 123 |
> |
MFUNC *f; |
| 124 |
|
int ne, na; |
| 125 |
< |
register int i; |
| 125 |
> |
int i; |
| 126 |
|
/* check to see if done already */ |
| 127 |
|
if ((f = (MFUNC *)m->os) != NULL) |
| 128 |
|
return(f); |
| 129 |
|
fobj = NULL; fray = NULL; |
| 130 |
< |
if (initfile[0]) { /* initialize on first call */ |
| 131 |
< |
esupport |= E_VARIABLE|E_FUNCTION|E_INCHAN|E_RCONST|E_REDEFW; |
| 56 |
< |
esupport &= ~(E_OUTCHAN); |
| 57 |
< |
setcontext(""); |
| 58 |
< |
scompile("Dx=$1;Dy=$2;Dz=$3;", NULL, 0); |
| 59 |
< |
scompile("Nx=$4;Ny=$5;Nz=$6;", NULL, 0); |
| 60 |
< |
scompile("Px=$7;Py=$8;Pz=$9;", NULL, 0); |
| 61 |
< |
scompile("T=$10;Ts=$25;Rdot=$11;", NULL, 0); |
| 62 |
< |
scompile("S=$12;Tx=$13;Ty=$14;Tz=$15;", NULL, 0); |
| 63 |
< |
scompile("Ix=$16;Iy=$17;Iz=$18;", NULL, 0); |
| 64 |
< |
scompile("Jx=$19;Jy=$20;Jz=$21;", NULL, 0); |
| 65 |
< |
scompile("Kx=$22;Ky=$23;Kz=$24;", NULL, 0); |
| 66 |
< |
scompile("Lu=$25;Lv=$26;", NULL, 0); |
| 67 |
< |
funset("arg", 1, '=', l_arg); |
| 68 |
< |
funset("erf", 1, ':', l_erf); |
| 69 |
< |
funset("erfc", 1, ':', l_erfc); |
| 70 |
< |
setnoisefuncs(); |
| 71 |
< |
setprismfuncs(); |
| 72 |
< |
loadfunc(initfile); |
| 73 |
< |
initfile[0] = '\0'; |
| 74 |
< |
} |
| 130 |
> |
if (rayinitcal[0]) /* initialize on first call */ |
| 131 |
> |
initfunc(); |
| 132 |
|
if ((na = m->oargs.nsargs) <= ff) |
| 133 |
|
goto toofew; |
| 134 |
|
arg = m->oargs.sarg; |
| 135 |
|
if ((f = (MFUNC *)calloc(1, sizeof(MFUNC))) == NULL) |
| 136 |
|
goto memerr; |
| 137 |
|
i = strlen(arg[ff]); /* set up context */ |
| 138 |
< |
if (i == 1 && arg[ff][0] == '.') |
| 139 |
< |
setcontext(f->ctx = ""); /* "." means no file */ |
| 140 |
< |
else { |
| 138 |
> |
if (i == 1 && arg[ff][0] == '.') { |
| 139 |
> |
calcontext(f->ctx = ""); /* "." means no file */ |
| 140 |
> |
} else { |
| 141 |
|
strcpy(sbuf,arg[ff]); /* file name is context */ |
| 142 |
|
if (i > LCALSUF && !strcmp(sbuf+i-LCALSUF, CALSUF)) |
| 143 |
|
sbuf[i-LCALSUF] = '\0'; /* remove suffix */ |
| 144 |
< |
setcontext(f->ctx = savestr(sbuf)); |
| 144 |
> |
calcontext(f->ctx = savestr(sbuf)); |
| 145 |
|
if (!vardefined(REFVNAME)) { /* file loaded? */ |
| 146 |
|
loadfunc(arg[ff]); |
| 147 |
|
varset(REFVNAME, '=', 1.0); |
| 148 |
|
} else /* reference_count++ */ |
| 149 |
|
varset(REFVNAME, '=', varvalue(REFVNAME)+1.0); |
| 150 |
|
} |
| 151 |
< |
curfunc = NULL; /* parse expressions */ |
| 151 |
> |
ecurfunc = NULL; /* parse expressions */ |
| 152 |
|
sprintf(sbuf, "%s \"%s\"", ofun[m->otype].funame, m->oname); |
| 153 |
|
for (i=0, ne=0; ef && i < na; i++, ef>>=1) |
| 154 |
|
if (ef & 1) { /* flagged as an expression? */ |
| 157 |
|
initstr(arg[i], sbuf, 0); |
| 158 |
|
f->ep[ne++] = getE1(); |
| 159 |
|
if (nextc != EOF) |
| 160 |
< |
syntax("unexpected character"); |
| 160 |
> |
esyntax("unexpected character"); |
| 161 |
|
} |
| 162 |
|
if (ef) |
| 163 |
|
goto toofew; |
| 165 |
|
i = ff+1; |
| 166 |
|
while (i < na && arg[i][0] != '-') |
| 167 |
|
i++; |
| 168 |
< |
if (i == na) /* no transform */ |
| 169 |
< |
f->f = f->b = &unitxf; |
| 170 |
< |
else { /* get transform */ |
| 171 |
< |
if ((f->b = (XF *)malloc(sizeof(XF))) == NULL) |
| 168 |
> |
if (i == na) { /* no transform */ |
| 169 |
> |
f->fxp = f->bxp = &unitxf; |
| 170 |
> |
} else { /* get transform */ |
| 171 |
> |
if ((f->bxp = (XF *)malloc(sizeof(XF))) == NULL) |
| 172 |
|
goto memerr; |
| 173 |
< |
if (invxf(f->b, na-i, arg+i) != na-i) |
| 173 |
> |
if (invxf(f->bxp, na-i, arg+i) != na-i) |
| 174 |
|
objerror(m, USER, "bad transform"); |
| 175 |
< |
if (f->b->sca < 0.0) |
| 176 |
< |
f->b->sca = -f->b->sca; |
| 175 |
> |
if (f->bxp->sca < 0.0) |
| 176 |
> |
f->bxp->sca = -f->bxp->sca; |
| 177 |
|
if (dofwd) { /* do both transforms */ |
| 178 |
< |
if ((f->f = (XF *)malloc(sizeof(XF))) == NULL) |
| 178 |
> |
if ((f->fxp = (XF *)malloc(sizeof(XF))) == NULL) |
| 179 |
|
goto memerr; |
| 180 |
< |
xf(f->f, na-i, arg+i); |
| 181 |
< |
if (f->f->sca < 0.0) |
| 182 |
< |
f->f->sca = -f->f->sca; |
| 180 |
> |
xf(f->fxp, na-i, arg+i); |
| 181 |
> |
if (f->fxp->sca < 0.0) |
| 182 |
> |
f->fxp->sca = -f->fxp->sca; |
| 183 |
|
} |
| 184 |
|
} |
| 185 |
|
m->os = (char *)f; |
| 188 |
|
objerror(m, USER, "too few string arguments"); |
| 189 |
|
memerr: |
| 190 |
|
error(SYSTEM, "out of memory in getfunc"); |
| 191 |
+ |
return NULL; /* pro forma return */ |
| 192 |
|
} |
| 193 |
|
|
| 194 |
|
|
| 195 |
|
void |
| 196 |
< |
freefunc(m) /* free memory associated with modifier */ |
| 197 |
< |
OBJREC *m; |
| 196 |
> |
freefunc( /* free memory associated with modifier */ |
| 197 |
> |
OBJREC *m |
| 198 |
> |
) |
| 199 |
|
{ |
| 200 |
< |
register MFUNC *f; |
| 201 |
< |
register int i; |
| 200 |
> |
MFUNC *f; |
| 201 |
> |
int i; |
| 202 |
|
|
| 203 |
|
if ((f = (MFUNC *)m->os) == NULL) |
| 204 |
|
return; |
| 205 |
|
for (i = 0; f->ep[i] != NULL; i++) |
| 206 |
< |
epfree(f->ep[i]); |
| 206 |
> |
epfree(f->ep[i],1); |
| 207 |
|
if (f->ctx[0]) { /* done with definitions */ |
| 208 |
< |
setcontext(f->ctx); |
| 208 |
> |
calcontext(f->ctx); |
| 209 |
|
i = varvalue(REFVNAME)-.5; /* reference_count-- */ |
| 210 |
|
if (i > 0) |
| 211 |
|
varset(REFVNAME, '=', (double)i); |
| 213 |
|
dcleanup(2); /* remove definitions */ |
| 214 |
|
freestr(f->ctx); |
| 215 |
|
} |
| 216 |
< |
if (f->b != &unitxf) |
| 217 |
< |
free((void *)f->b); |
| 218 |
< |
if (f->f != NULL && f->f != &unitxf) |
| 219 |
< |
free((void *)f->f); |
| 216 |
> |
if (f->bxp != &unitxf) |
| 217 |
> |
free((void *)f->bxp); |
| 218 |
> |
if ((f->fxp != NULL) & (f->fxp != &unitxf)) |
| 219 |
> |
free((void *)f->fxp); |
| 220 |
|
free((void *)f); |
| 221 |
|
m->os = NULL; |
| 222 |
|
} |
| 223 |
|
|
| 224 |
|
|
| 225 |
|
int |
| 226 |
< |
setfunc(m, r) /* set channels for function call */ |
| 227 |
< |
OBJREC *m; |
| 228 |
< |
register RAY *r; |
| 226 |
> |
setfunc( /* set channels for function call */ |
| 227 |
> |
OBJREC *m, |
| 228 |
> |
RAY *r |
| 229 |
> |
) |
| 230 |
|
{ |
| 231 |
< |
static unsigned long lastrno = ~0; |
| 232 |
< |
register MFUNC *f; |
| 233 |
< |
/* get function */ |
| 231 |
> |
static RNUMBER lastrno = ~0; |
| 232 |
> |
MFUNC *f; |
| 233 |
> |
/* get function if any */ |
| 234 |
|
if ((f = (MFUNC *)m->os) == NULL) |
| 235 |
|
objerror(m, CONSISTENCY, "setfunc called before getfunc"); |
| 236 |
< |
/* set evaluator context */ |
| 237 |
< |
setcontext(f->ctx); |
| 236 |
> |
|
| 237 |
> |
calcontext(f->ctx); /* set evaluator context */ |
| 238 |
|
/* check to see if matrix set */ |
| 239 |
< |
if (m == fobj && r->rno == lastrno) |
| 239 |
> |
if ((m == fobj) & (r->rno == lastrno)) |
| 240 |
|
return(0); |
| 241 |
|
fobj = m; |
| 242 |
|
fray = r; |
| 243 |
< |
if (r->rox != NULL) |
| 244 |
< |
if (f->b != &unitxf) { |
| 245 |
< |
funcxf.sca = r->rox->b.sca * f->b->sca; |
| 246 |
< |
multmat4(funcxf.xfm, r->rox->b.xfm, f->b->xfm); |
| 243 |
> |
if (r->rox != NULL) { |
| 244 |
> |
if (f->bxp != &unitxf) { |
| 245 |
> |
funcxf.sca = r->rox->b.sca * f->bxp->sca; |
| 246 |
> |
multmat4(funcxf.xfm, r->rox->b.xfm, f->bxp->xfm); |
| 247 |
|
} else |
| 248 |
< |
copystruct(&funcxf, &r->rox->b); |
| 249 |
< |
else |
| 250 |
< |
copystruct(&funcxf, f->b); |
| 248 |
> |
funcxf = r->rox->b; |
| 249 |
> |
} else |
| 250 |
> |
funcxf = *f->bxp; |
| 251 |
|
lastrno = r->rno; |
| 252 |
|
eclock++; /* notify expression evaluator */ |
| 253 |
|
return(1); |
| 254 |
|
} |
| 255 |
|
|
| 256 |
|
|
| 257 |
+ |
int |
| 258 |
+ |
worldfunc( /* special function context sans object */ |
| 259 |
+ |
char *ctx, |
| 260 |
+ |
RAY *r |
| 261 |
+ |
) |
| 262 |
+ |
{ |
| 263 |
+ |
static RNUMBER lastrno = ~0; |
| 264 |
+ |
|
| 265 |
+ |
if (rayinitcal[0]) /* initialize on first call */ |
| 266 |
+ |
initfunc(); |
| 267 |
+ |
/* set evaluator context */ |
| 268 |
+ |
calcontext(ctx); |
| 269 |
+ |
/* check if ray already set */ |
| 270 |
+ |
if ((fobj == NULL) & (r->rno == lastrno)) |
| 271 |
+ |
return(0); |
| 272 |
+ |
fobj = NULL; |
| 273 |
+ |
fray = r; |
| 274 |
+ |
funcxf = unitxf; |
| 275 |
+ |
lastrno = r->rno; |
| 276 |
+ |
eclock++; /* notify expression evaluator */ |
| 277 |
+ |
return(1); |
| 278 |
+ |
} |
| 279 |
+ |
|
| 280 |
+ |
|
| 281 |
|
void |
| 282 |
< |
loadfunc(fname) /* load definition file */ |
| 283 |
< |
char *fname; |
| 282 |
> |
loadfunc( /* load definition file */ |
| 283 |
> |
char *fname |
| 284 |
> |
) |
| 285 |
|
{ |
| 286 |
|
char *ffname; |
| 287 |
|
|
| 288 |
< |
if ((ffname = getpath(fname, getlibpath(), R_OK)) == NULL) { |
| 288 |
> |
if ((ffname = getpath(fname, getrlibpath(), R_OK)) == NULL) { |
| 289 |
|
sprintf(errmsg, "cannot find function file \"%s\"", fname); |
| 290 |
< |
error(USER, errmsg); |
| 290 |
> |
error(SYSTEM, errmsg); |
| 291 |
|
} |
| 292 |
|
fcompile(ffname); |
| 293 |
+ |
doptimize(1); /* optimize definitions */ |
| 294 |
|
} |
| 295 |
|
|
| 296 |
|
|
| 297 |
|
static double |
| 298 |
< |
l_arg() /* return nth real argument */ |
| 298 |
> |
l_arg(char *nm) /* return nth real argument */ |
| 299 |
|
{ |
| 300 |
< |
register int n; |
| 300 |
> |
int n; |
| 301 |
|
|
| 302 |
|
if (fobj == NULL) |
| 303 |
< |
syntax("arg(n) used in constant expression"); |
| 303 |
> |
error(USER, |
| 304 |
> |
"bad call to arg(n) - illegal constant in .cal file?"); |
| 305 |
|
|
| 306 |
|
n = argument(1) + .5; /* round to integer */ |
| 307 |
|
|
| 317 |
|
|
| 318 |
|
|
| 319 |
|
static double |
| 320 |
< |
l_erf() /* error function */ |
| 320 |
> |
l_erf(char *nm) /* error function */ |
| 321 |
|
{ |
| 235 |
– |
extern double erf(); |
| 236 |
– |
|
| 322 |
|
return(erf(argument(1))); |
| 323 |
|
} |
| 324 |
|
|
| 325 |
|
|
| 326 |
|
static double |
| 327 |
< |
l_erfc() /* cumulative error function */ |
| 327 |
> |
l_erfc(char *nm) /* cumulative error function */ |
| 328 |
|
{ |
| 244 |
– |
extern double erfc(); |
| 245 |
– |
|
| 329 |
|
return(erfc(argument(1))); |
| 330 |
|
} |
| 331 |
|
|
| 332 |
|
|
| 333 |
|
double |
| 334 |
< |
chanvalue(n) /* return channel n to calcomp */ |
| 335 |
< |
register int n; |
| 334 |
> |
chanvalue( /* return channel n to calcomp */ |
| 335 |
> |
int n |
| 336 |
> |
) |
| 337 |
|
{ |
| 338 |
|
if (fray == NULL) |
| 339 |
< |
syntax("ray parameter used in constant expression"); |
| 339 |
> |
esyntax("ray parameter used in constant expression"); |
| 340 |
|
|
| 341 |
|
if (--n < 0) |
| 342 |
|
goto badchan; |
| 343 |
|
|
| 344 |
< |
if (n < 3) /* ray direction */ |
| 344 |
> |
if (n <= 2) /* ray direction */ |
| 345 |
|
|
| 346 |
|
return( ( fray->rdir[0]*funcxf.xfm[0][n] + |
| 347 |
|
fray->rdir[1]*funcxf.xfm[1][n] + |
| 348 |
|
fray->rdir[2]*funcxf.xfm[2][n] ) |
| 349 |
|
/ funcxf.sca ); |
| 350 |
|
|
| 351 |
< |
if (n < 6) /* surface normal */ |
| 351 |
> |
if (n <= 5) /* surface normal */ |
| 352 |
|
|
| 353 |
|
return( ( fray->ron[0]*funcxf.xfm[0][n-3] + |
| 354 |
|
fray->ron[1]*funcxf.xfm[1][n-3] + |
| 355 |
|
fray->ron[2]*funcxf.xfm[2][n-3] ) |
| 356 |
|
/ funcxf.sca ); |
| 357 |
|
|
| 358 |
< |
if (n < 9) /* intersection */ |
| 358 |
> |
if (n <= 8) { /* intersection point */ |
| 359 |
> |
if (fray->rot >= FHUGE*.99) |
| 360 |
> |
return(0.0); /* XXX should be runtime error? */ |
| 361 |
|
|
| 362 |
|
return( fray->rop[0]*funcxf.xfm[0][n-6] + |
| 363 |
|
fray->rop[1]*funcxf.xfm[1][n-6] + |
| 364 |
|
fray->rop[2]*funcxf.xfm[2][n-6] + |
| 365 |
|
funcxf.xfm[3][n-6] ); |
| 366 |
+ |
} |
| 367 |
|
|
| 368 |
|
if (n == 9) /* total distance */ |
| 369 |
|
return(raydist(fray,PRIMARY) * funcxf.sca); |
| 376 |
|
if (n == 11) /* scale */ |
| 377 |
|
return(funcxf.sca); |
| 378 |
|
|
| 379 |
< |
if (n < 15) /* origin */ |
| 379 |
> |
if (n <= 14) /* origin */ |
| 380 |
|
return(funcxf.xfm[3][n-12]); |
| 381 |
|
|
| 382 |
< |
if (n < 18) /* i unit vector */ |
| 382 |
> |
if (n <= 17) /* i unit vector */ |
| 383 |
|
return(funcxf.xfm[0][n-15] / funcxf.sca); |
| 384 |
|
|
| 385 |
< |
if (n < 21) /* j unit vector */ |
| 386 |
< |
return(funcxf.xfm[1][n-15] / funcxf.sca); |
| 385 |
> |
if (n <= 20) /* j unit vector */ |
| 386 |
> |
return(funcxf.xfm[1][n-18] / funcxf.sca); |
| 387 |
|
|
| 388 |
< |
if (n < 24) /* k unit vector */ |
| 388 |
> |
if (n <= 23) /* k unit vector */ |
| 389 |
|
return(funcxf.xfm[2][n-21] / funcxf.sca); |
| 390 |
|
|
| 391 |
< |
if (n < 25) /* single ray (shadow) distance */ |
| 391 |
> |
if (n == 24) /* single ray (shadow) distance */ |
| 392 |
|
return((fray->rot+raydist(fray->parent,SHADOW)) * funcxf.sca); |
| 393 |
|
|
| 394 |
< |
if (n < 27) /* local (u,v) coordinates */ |
| 395 |
< |
return(fray->uv[n-26]); |
| 394 |
> |
if (n <= 26) /* local (u,v) coordinates */ |
| 395 |
> |
return(fray->uv[n-25]); |
| 396 |
|
badchan: |
| 397 |
|
error(USER, "illegal channel number"); |
| 398 |
|
return(0.0); |
