| 19 |
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| 20 |
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#include "face.h" |
| 21 |
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| 22 |
< |
#define SRCINC 8 /* realloc increment for array */ |
| 22 |
> |
#define SRCINC 32 /* realloc increment for array */ |
| 23 |
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| 24 |
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SRCREC *source = NULL; /* our list of sources */ |
| 25 |
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int nsources = 0; /* the number of sources */ |
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| 30 |
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void |
| 31 |
< |
initstypes() /* initialize source dispatch table */ |
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> |
initstypes(void) /* initialize source dispatch table */ |
| 32 |
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{ |
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extern VSMATERIAL mirror_vs, direct1_vs, direct2_vs; |
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static SOBJECT fsobj = {fsetsrc, flatpart, fgetplaneq, fgetmaxdisk}; |
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int |
| 52 |
< |
newsource() /* allocate new source in our array */ |
| 52 |
> |
newsource(void) /* allocate new source in our array */ |
| 53 |
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{ |
| 54 |
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if (nsources == 0) |
| 55 |
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source = (SRCREC *)malloc(SRCINC*sizeof(SRCREC)); |
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void |
| 72 |
< |
setflatss(src) /* set sampling for a flat source */ |
| 73 |
< |
register SRCREC *src; |
| 72 |
> |
setflatss( /* set sampling for a flat source */ |
| 73 |
> |
SRCREC *src |
| 74 |
> |
) |
| 75 |
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{ |
| 76 |
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double mult; |
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< |
register int i; |
| 77 |
> |
int i; |
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|
| 79 |
< |
src->ss[SV][0] = src->ss[SV][1] = src->ss[SV][2] = 0.0; |
| 79 |
> |
getperpendicular(src->ss[SU], src->snorm, rand_samp); |
| 80 |
> |
mult = .5 * sqrt( src->ss2 ); |
| 81 |
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for (i = 0; i < 3; i++) |
| 80 |
– |
if (src->snorm[i] < 0.6 && src->snorm[i] > -0.6) |
| 81 |
– |
break; |
| 82 |
– |
src->ss[SV][i] = 1.0; |
| 83 |
– |
fcross(src->ss[SU], src->ss[SV], src->snorm); |
| 84 |
– |
mult = .5 * sqrt( src->ss2 / DOT(src->ss[SU],src->ss[SU]) ); |
| 85 |
– |
for (i = 0; i < 3; i++) |
| 82 |
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src->ss[SU][i] *= mult; |
| 83 |
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fcross(src->ss[SV], src->snorm, src->ss[SU]); |
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} |
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| 87 |
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void |
| 88 |
< |
fsetsrc(src, so) /* set a face as a source */ |
| 89 |
< |
register SRCREC *src; |
| 90 |
< |
OBJREC *so; |
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> |
fsetsrc( /* set a face as a source */ |
| 89 |
> |
SRCREC *src, |
| 90 |
> |
OBJREC *so |
| 91 |
> |
) |
| 92 |
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{ |
| 93 |
< |
register FACE *f; |
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< |
register int i, j; |
| 93 |
> |
FACE *f; |
| 94 |
> |
int i, j; |
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double d; |
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src->sa.success = 2*AIMREQT-1; /* bitch on second failure */ |
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src->so = so; |
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/* get the face */ |
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f = getface(so); |
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< |
if (f->area == 0.0) |
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> |
if (f->area == 0.) |
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objerror(so, USER, "zero source area"); |
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/* find the center */ |
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for (j = 0; j < 3; j++) { |
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} |
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src->srad = sqrt(src->srad); |
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/* compute size vectors */ |
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< |
if (f->nv == 4) /* parallelogram case */ |
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> |
if (f->nv == 4) { /* parallelogram case */ |
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for (j = 0; j < 3; j++) { |
| 126 |
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src->ss[SU][j] = .5*(VERTEX(f,1)[j]-VERTEX(f,0)[j]); |
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src->ss[SV][j] = .5*(VERTEX(f,3)[j]-VERTEX(f,0)[j]); |
| 128 |
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} |
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< |
else |
| 130 |
< |
setflatss(src); |
| 129 |
> |
} else if (f->nv == 3) { /* triangle case */ |
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> |
int near0 = 2; |
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> |
double dmin = dist2line(src->sloc, VERTEX(f,2), VERTEX(f,0)); |
| 132 |
> |
for (i = 0; i < 2; i++) { |
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> |
double d2 = dist2line(src->sloc, VERTEX(f,i), VERTEX(f,i+1)); |
| 134 |
> |
if (d2 >= dmin) |
| 135 |
> |
continue; |
| 136 |
> |
near0 = i; |
| 137 |
> |
dmin = d2; /* radius = min distance */ |
| 138 |
> |
} |
| 139 |
> |
if (dmin < .08*f->area) |
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> |
objerror(so, WARNING, "triangular source with poor aspect"); |
| 141 |
> |
i = (near0 + 1) % 3; |
| 142 |
> |
for (j = 0; j < 3; j++) |
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> |
src->ss[SU][j] = VERTEX(f,i)[j] - VERTEX(f,near0)[j]; |
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> |
normalize(src->ss[SU]); |
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> |
dmin = sqrt(dmin); |
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> |
for (j = 0; j < 3; j++) |
| 147 |
> |
src->ss[SU][j] *= dmin; |
| 148 |
> |
fcross(src->ss[SV], f->norm, src->ss[SU]); |
| 149 |
> |
} else |
| 150 |
> |
setflatss(src); /* hope for convex! */ |
| 151 |
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} |
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void |
| 155 |
< |
ssetsrc(src, so) /* set a source as a source */ |
| 156 |
< |
register SRCREC *src; |
| 157 |
< |
register OBJREC *so; |
| 155 |
> |
ssetsrc( /* set a source as a source */ |
| 156 |
> |
SRCREC *src, |
| 157 |
> |
OBJREC *so |
| 158 |
> |
) |
| 159 |
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{ |
| 160 |
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double theta; |
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| 163 |
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src->so = so; |
| 164 |
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if (so->oargs.nfargs != 4) |
| 165 |
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objerror(so, USER, "bad arguments"); |
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< |
src->sflags |= SDISTANT; |
| 166 |
> |
src->sflags |= (SDISTANT|SCIR); |
| 167 |
|
VCOPY(src->sloc, so->oargs.farg); |
| 168 |
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if (normalize(src->sloc) == 0.0) |
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objerror(so, USER, "zero direction"); |
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src->srad = sqrt(src->ss2/PI); |
| 176 |
|
VCOPY(src->snorm, src->sloc); |
| 177 |
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setflatss(src); /* hey, whatever works */ |
| 160 |
– |
src->ss[SW][0] = src->ss[SW][1] = src->ss[SW][2] = 0.0; |
| 178 |
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} |
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| 181 |
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void |
| 182 |
< |
sphsetsrc(src, so) /* set a sphere as a source */ |
| 183 |
< |
register SRCREC *src; |
| 184 |
< |
register OBJREC *so; |
| 182 |
> |
sphsetsrc( /* set a sphere as a source */ |
| 183 |
> |
SRCREC *src, |
| 184 |
> |
OBJREC *so |
| 185 |
> |
) |
| 186 |
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{ |
| 187 |
< |
register int i; |
| 187 |
> |
int i; |
| 188 |
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| 189 |
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src->sa.success = 2*AIMREQT-1; /* bitch on second failure */ |
| 190 |
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src->so = so; |
| 192 |
|
objerror(so, USER, "bad # arguments"); |
| 193 |
|
if (so->oargs.farg[3] <= FTINY) |
| 194 |
|
objerror(so, USER, "illegal source radius"); |
| 195 |
+ |
src->sflags |= SCIR; |
| 196 |
|
VCOPY(src->sloc, so->oargs.farg); |
| 197 |
|
src->srad = so->oargs.farg[3]; |
| 198 |
|
src->ss2 = PI * src->srad * src->srad; |
| 199 |
+ |
memset(src->ss, 0, sizeof(src->ss)); |
| 200 |
|
for (i = 0; i < 3; i++) |
| 201 |
< |
src->ss[SU][i] = src->ss[SV][i] = src->ss[SW][i] = 0.0; |
| 182 |
< |
for (i = 0; i < 3; i++) |
| 183 |
< |
src->ss[i][i] = .7236 * so->oargs.farg[3]; |
| 201 |
> |
src->ss[i][i] = 0.7236 * so->oargs.farg[3]; |
| 202 |
|
} |
| 203 |
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|
| 204 |
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|
| 205 |
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void |
| 206 |
< |
rsetsrc(src, so) /* set a ring (disk) as a source */ |
| 207 |
< |
register SRCREC *src; |
| 208 |
< |
OBJREC *so; |
| 206 |
> |
rsetsrc( /* set a ring (disk) as a source */ |
| 207 |
> |
SRCREC *src, |
| 208 |
> |
OBJREC *so |
| 209 |
> |
) |
| 210 |
|
{ |
| 211 |
< |
register CONE *co; |
| 211 |
> |
CONE *co; |
| 212 |
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|
| 213 |
|
src->sa.success = 2*AIMREQT-1; /* bitch on second failure */ |
| 214 |
|
src->so = so; |
| 215 |
|
/* get the ring */ |
| 216 |
|
co = getcone(so, 0); |
| 217 |
+ |
if (co == NULL) |
| 218 |
+ |
objerror(so, USER, "illegal source"); |
| 219 |
|
if (CO_R1(co) <= FTINY) |
| 220 |
|
objerror(so, USER, "illegal source radius"); |
| 221 |
|
VCOPY(src->sloc, CO_P0(co)); |
| 222 |
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if (CO_R0(co) > 0.0) |
| 223 |
|
objerror(so, USER, "cannot hit source center"); |
| 224 |
< |
src->sflags |= SFLAT; |
| 224 |
> |
src->sflags |= (SFLAT|SCIR); |
| 225 |
|
VCOPY(src->snorm, co->ad); |
| 226 |
|
src->srad = CO_R1(co); |
| 227 |
|
src->ss2 = PI * src->srad * src->srad; |
| 230 |
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| 231 |
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| 232 |
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void |
| 233 |
< |
cylsetsrc(src, so) /* set a cylinder as a source */ |
| 234 |
< |
register SRCREC *src; |
| 235 |
< |
OBJREC *so; |
| 233 |
> |
cylsetsrc( /* set a cylinder as a source */ |
| 234 |
> |
SRCREC *src, |
| 235 |
> |
OBJREC *so |
| 236 |
> |
) |
| 237 |
|
{ |
| 238 |
< |
register CONE *co; |
| 239 |
< |
register int i; |
| 238 |
> |
CONE *co; |
| 239 |
> |
int i; |
| 240 |
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|
| 241 |
|
src->sa.success = 4*AIMREQT-1; /* bitch on fourth failure */ |
| 242 |
|
src->so = so; |
| 243 |
|
/* get the cylinder */ |
| 244 |
|
co = getcone(so, 0); |
| 245 |
+ |
if (co == NULL) |
| 246 |
+ |
objerror(so, USER, "illegal source"); |
| 247 |
|
if (CO_R0(co) <= FTINY) |
| 248 |
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objerror(so, USER, "illegal source radius"); |
| 249 |
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if (CO_R0(co) > .2*co->al) /* heuristic constraint */ |
| 256 |
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/* set sampling vectors */ |
| 257 |
|
for (i = 0; i < 3; i++) |
| 258 |
|
src->ss[SU][i] = .5 * co->al * co->ad[i]; |
| 259 |
< |
src->ss[SV][0] = src->ss[SV][1] = src->ss[SV][2] = 0.0; |
| 259 |
> |
getperpendicular(src->ss[SW], co->ad, rand_samp); |
| 260 |
|
for (i = 0; i < 3; i++) |
| 237 |
– |
if (co->ad[i] < 0.6 && co->ad[i] > -0.6) |
| 238 |
– |
break; |
| 239 |
– |
src->ss[SV][i] = 1.0; |
| 240 |
– |
fcross(src->ss[SW], src->ss[SV], co->ad); |
| 241 |
– |
normalize(src->ss[SW]); |
| 242 |
– |
for (i = 0; i < 3; i++) |
| 261 |
|
src->ss[SW][i] *= .8559 * CO_R0(co); |
| 262 |
|
fcross(src->ss[SV], src->ss[SW], co->ad); |
| 263 |
|
} |
| 264 |
|
|
| 265 |
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|
| 266 |
|
SPOT * |
| 267 |
< |
makespot(m) /* make a spotlight */ |
| 268 |
< |
register OBJREC *m; |
| 267 |
> |
makespot( /* make a spotlight */ |
| 268 |
> |
OBJREC *m |
| 269 |
> |
) |
| 270 |
|
{ |
| 271 |
< |
register SPOT *ns; |
| 271 |
> |
SPOT *ns; |
| 272 |
|
|
| 273 |
|
if ((ns = (SPOT *)m->os) != NULL) |
| 274 |
|
return(ns); |
| 286 |
|
|
| 287 |
|
|
| 288 |
|
int |
| 289 |
< |
spotout(r, s) /* check if we're outside spot region */ |
| 290 |
< |
register RAY *r; |
| 291 |
< |
register SPOT *s; |
| 289 |
> |
spotout( /* check if we're outside spot region */ |
| 290 |
> |
RAY *r, |
| 291 |
> |
SPOT *s |
| 292 |
> |
) |
| 293 |
|
{ |
| 294 |
|
double d; |
| 295 |
|
FVECT vd; |
| 317 |
|
|
| 318 |
|
|
| 319 |
|
double |
| 320 |
< |
fgetmaxdisk(ocent, op) /* get center and squared radius of face */ |
| 321 |
< |
FVECT ocent; |
| 322 |
< |
OBJREC *op; |
| 320 |
> |
fgetmaxdisk( /* get center and squared radius of face */ |
| 321 |
> |
FVECT ocent, |
| 322 |
> |
OBJREC *op |
| 323 |
> |
) |
| 324 |
|
{ |
| 325 |
|
double maxrad2; |
| 326 |
|
double d; |
| 327 |
< |
register int i, j; |
| 328 |
< |
register FACE *f; |
| 327 |
> |
int i, j; |
| 328 |
> |
FACE *f; |
| 329 |
|
|
| 330 |
|
f = getface(op); |
| 331 |
|
if (f->area == 0.) |
| 350 |
|
|
| 351 |
|
|
| 352 |
|
double |
| 353 |
< |
rgetmaxdisk(ocent, op) /* get center and squared radius of ring */ |
| 354 |
< |
FVECT ocent; |
| 355 |
< |
OBJREC *op; |
| 353 |
> |
rgetmaxdisk( /* get center and squared radius of ring */ |
| 354 |
> |
FVECT ocent, |
| 355 |
> |
OBJREC *op |
| 356 |
> |
) |
| 357 |
|
{ |
| 358 |
< |
register CONE *co; |
| 358 |
> |
CONE *co; |
| 359 |
|
|
| 360 |
|
co = getcone(op, 0); |
| 361 |
+ |
if (co == NULL) |
| 362 |
+ |
return(0.); |
| 363 |
|
VCOPY(ocent, CO_P0(co)); |
| 364 |
|
return(CO_R1(co)*CO_R1(co)); |
| 365 |
|
} |
| 366 |
|
|
| 367 |
|
|
| 368 |
|
double |
| 369 |
< |
fgetplaneq(nvec, op) /* get plane equation for face */ |
| 370 |
< |
FVECT nvec; |
| 371 |
< |
OBJREC *op; |
| 369 |
> |
fgetplaneq( /* get plane equation for face */ |
| 370 |
> |
FVECT nvec, |
| 371 |
> |
OBJREC *op |
| 372 |
> |
) |
| 373 |
|
{ |
| 374 |
< |
register FACE *fo; |
| 374 |
> |
FACE *fo; |
| 375 |
|
|
| 376 |
|
fo = getface(op); |
| 377 |
|
VCOPY(nvec, fo->norm); |
| 380 |
|
|
| 381 |
|
|
| 382 |
|
double |
| 383 |
< |
rgetplaneq(nvec, op) /* get plane equation for ring */ |
| 384 |
< |
FVECT nvec; |
| 385 |
< |
OBJREC *op; |
| 383 |
> |
rgetplaneq( /* get plane equation for ring */ |
| 384 |
> |
FVECT nvec, |
| 385 |
> |
OBJREC *op |
| 386 |
> |
) |
| 387 |
|
{ |
| 388 |
< |
register CONE *co; |
| 388 |
> |
CONE *co; |
| 389 |
|
|
| 390 |
|
co = getcone(op, 0); |
| 391 |
+ |
if (co == NULL) { |
| 392 |
+ |
memset(nvec, 0, sizeof(FVECT)); |
| 393 |
+ |
return(0.); |
| 394 |
+ |
} |
| 395 |
|
VCOPY(nvec, co->ad); |
| 396 |
|
return(DOT(nvec, CO_P0(co))); |
| 397 |
|
} |
| 398 |
|
|
| 399 |
|
|
| 400 |
|
int |
| 401 |
< |
commonspot(sp1, sp2, org) /* set sp1 to intersection of sp1 and sp2 */ |
| 402 |
< |
register SPOT *sp1, *sp2; |
| 403 |
< |
FVECT org; |
| 401 |
> |
commonspot( /* set sp1 to intersection of sp1 and sp2 */ |
| 402 |
> |
SPOT *sp1, |
| 403 |
> |
SPOT *sp2, |
| 404 |
> |
FVECT org |
| 405 |
> |
) |
| 406 |
|
{ |
| 407 |
|
FVECT cent; |
| 408 |
|
double rad2, cos1, cos2; |
| 424 |
|
|
| 425 |
|
|
| 426 |
|
int |
| 427 |
< |
commonbeam(sp1, sp2, dir) /* set sp1 to intersection of sp1 and sp2 */ |
| 428 |
< |
register SPOT *sp1, *sp2; |
| 429 |
< |
FVECT dir; |
| 427 |
> |
commonbeam( /* set sp1 to intersection of sp1 and sp2 */ |
| 428 |
> |
SPOT *sp1, |
| 429 |
> |
SPOT *sp2, |
| 430 |
> |
FVECT dir |
| 431 |
> |
) |
| 432 |
|
{ |
| 433 |
|
FVECT cent, c1, c2; |
| 434 |
|
double rad2, d; |
| 401 |
– |
register int i; |
| 435 |
|
/* move centers to common plane */ |
| 436 |
|
d = DOT(sp1->aim, dir); |
| 437 |
< |
for (i = 0; i < 3; i++) |
| 405 |
< |
c1[i] = sp1->aim[i] - d*dir[i]; |
| 437 |
> |
VSUM(c1, sp1->aim, dir, -d); |
| 438 |
|
d = DOT(sp2->aim, dir); |
| 439 |
< |
for (i = 0; i < 3; i++) |
| 408 |
< |
c2[i] = sp2->aim[i] - d*dir[i]; |
| 439 |
> |
VSUM(c2, sp2->aim, dir, -d); |
| 440 |
|
/* compute overlap */ |
| 441 |
|
rad2 = intercircle(cent, c1, c2, sp1->siz/PI, sp2->siz/PI); |
| 442 |
|
if (rad2 <= FTINY) |
| 448 |
|
|
| 449 |
|
|
| 450 |
|
int |
| 451 |
< |
checkspot(sp, nrm) /* check spotlight for behind source */ |
| 452 |
< |
register SPOT *sp; /* spotlight */ |
| 453 |
< |
FVECT nrm; /* source surface normal */ |
| 451 |
> |
checkspot( /* check spotlight for behind source */ |
| 452 |
> |
SPOT *sp, /* spotlight */ |
| 453 |
> |
FVECT nrm /* source surface normal */ |
| 454 |
> |
) |
| 455 |
|
{ |
| 456 |
|
double d, d1; |
| 457 |
|
|
| 465 |
|
|
| 466 |
|
|
| 467 |
|
double |
| 468 |
< |
spotdisk(oc, op, sp, pos) /* intersect spot with object op */ |
| 469 |
< |
FVECT oc; |
| 470 |
< |
OBJREC *op; |
| 471 |
< |
register SPOT *sp; |
| 472 |
< |
FVECT pos; |
| 468 |
> |
spotdisk( /* intersect spot with object op */ |
| 469 |
> |
FVECT oc, |
| 470 |
> |
OBJREC *op, |
| 471 |
> |
SPOT *sp, |
| 472 |
> |
FVECT pos |
| 473 |
> |
) |
| 474 |
|
{ |
| 475 |
|
FVECT onorm; |
| 476 |
|
double offs, d, dist; |
| 444 |
– |
register int i; |
| 477 |
|
|
| 478 |
|
offs = getplaneq(onorm, op); |
| 479 |
|
d = -DOT(onorm, sp->aim); |
| 482 |
|
dist = (DOT(pos, onorm) - offs)/d; |
| 483 |
|
if (dist < 0.) |
| 484 |
|
return(0.); |
| 485 |
< |
for (i = 0; i < 3; i++) |
| 454 |
< |
oc[i] = pos[i] + dist*sp->aim[i]; |
| 485 |
> |
VSUM(oc, pos, sp->aim, dist); |
| 486 |
|
return(sp->siz*dist*dist/PI/(d*d)); |
| 487 |
|
} |
| 488 |
|
|
| 489 |
|
|
| 490 |
|
double |
| 491 |
< |
beamdisk(oc, op, sp, dir) /* intersect beam with object op */ |
| 492 |
< |
FVECT oc; |
| 493 |
< |
OBJREC *op; |
| 494 |
< |
register SPOT *sp; |
| 495 |
< |
FVECT dir; |
| 491 |
> |
beamdisk( /* intersect beam with object op */ |
| 492 |
> |
FVECT oc, |
| 493 |
> |
OBJREC *op, |
| 494 |
> |
SPOT *sp, |
| 495 |
> |
FVECT dir |
| 496 |
> |
) |
| 497 |
|
{ |
| 498 |
|
FVECT onorm; |
| 499 |
|
double offs, d, dist; |
| 468 |
– |
register int i; |
| 500 |
|
|
| 501 |
|
offs = getplaneq(onorm, op); |
| 502 |
|
d = -DOT(onorm, dir); |
| 503 |
|
if (d >= -FTINY && d <= FTINY) |
| 504 |
|
return(0.); |
| 505 |
|
dist = (DOT(sp->aim, onorm) - offs)/d; |
| 506 |
< |
for (i = 0; i < 3; i++) |
| 476 |
< |
oc[i] = sp->aim[i] + dist*dir[i]; |
| 506 |
> |
VSUM(oc, sp->aim, dir, dist); |
| 507 |
|
return(sp->siz/PI/(d*d)); |
| 508 |
|
} |
| 509 |
|
|
| 510 |
|
|
| 511 |
|
double |
| 512 |
< |
intercircle(cc, c1, c2, r1s, r2s) /* intersect two circles */ |
| 513 |
< |
FVECT cc; /* midpoint (return value) */ |
| 514 |
< |
FVECT c1, c2; /* circle centers */ |
| 515 |
< |
double r1s, r2s; /* radii squared */ |
| 512 |
> |
intercircle( /* intersect two circles */ |
| 513 |
> |
FVECT cc, /* midpoint (return value) */ |
| 514 |
> |
FVECT c1, /* circle centers */ |
| 515 |
> |
FVECT c2, |
| 516 |
> |
double r1s, /* radii squared */ |
| 517 |
> |
double r2s |
| 518 |
> |
) |
| 519 |
|
{ |
| 520 |
|
double a2, d2, l; |
| 521 |
|
FVECT disp; |
| 489 |
– |
register int i; |
| 522 |
|
|
| 523 |
< |
for (i = 0; i < 3; i++) |
| 492 |
< |
disp[i] = c2[i] - c1[i]; |
| 523 |
> |
VSUB(disp, c2, c1); |
| 524 |
|
d2 = DOT(disp,disp); |
| 525 |
|
/* circle within overlap? */ |
| 526 |
|
if (r1s < r2s) { |
| 540 |
|
return(0.); |
| 541 |
|
/* overlap, compute center */ |
| 542 |
|
l = sqrt((r1s - a2)/d2); |
| 543 |
< |
for (i = 0; i < 3; i++) |
| 513 |
< |
cc[i] = c1[i] + l*disp[i]; |
| 543 |
> |
VSUM(cc, c1, disp, l); |
| 544 |
|
return(a2); |
| 545 |
|
} |
