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#include "face.h" |
21 |
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#define SRCINC 8 /* realloc increment for array */ |
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> |
#define SRCINC 32 /* realloc increment for array */ |
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SRCREC *source = NULL; /* our list of sources */ |
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int nsources = 0; /* the number of sources */ |
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void |
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initstypes() /* initialize source dispatch table */ |
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initstypes(void) /* initialize source dispatch table */ |
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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 |
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newsource() /* allocate new source in our array */ |
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newsource(void) /* allocate new source in our array */ |
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{ |
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if (nsources == 0) |
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source = (SRCREC *)malloc(SRCINC*sizeof(SRCREC)); |
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void |
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setflatss(src) /* set sampling for a flat source */ |
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register SRCREC *src; |
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setflatss( /* set sampling for a flat source */ |
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SRCREC *src |
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) |
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{ |
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double mult; |
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register int i; |
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> |
int i; |
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|
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src->ss[SV][0] = src->ss[SV][1] = src->ss[SV][2] = 0.0; |
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for (i = 0; i < 3; i++) |
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void |
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fsetsrc(src, so) /* set a face as a source */ |
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register SRCREC *src; |
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OBJREC *so; |
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fsetsrc( /* set a face as a source */ |
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SRCREC *src, |
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OBJREC *so |
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) |
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{ |
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register FACE *f; |
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register int i, j; |
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FACE *f; |
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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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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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src->sloc[j] = 0.0; |
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src->sloc[j] /= (double)f->nv; |
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} |
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if (!inface(src->sloc, f)) |
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objerror(so, USER, "cannot hit center"); |
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objerror(so, USER, "cannot hit source center"); |
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src->sflags |= SFLAT; |
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VCOPY(src->snorm, f->norm); |
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src->ss2 = f->area; |
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void |
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ssetsrc(src, so) /* set a source as a source */ |
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register SRCREC *src; |
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register OBJREC *so; |
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ssetsrc( /* set a source as a source */ |
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SRCREC *src, |
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OBJREC *so |
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) |
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{ |
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double theta; |
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src->so = so; |
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if (so->oargs.nfargs != 4) |
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objerror(so, USER, "bad arguments"); |
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src->sflags |= SDISTANT; |
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src->sflags |= (SDISTANT|SCIR); |
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VCOPY(src->sloc, so->oargs.farg); |
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if (normalize(src->sloc) == 0.0) |
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objerror(so, USER, "zero direction"); |
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void |
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sphsetsrc(src, so) /* set a sphere as a source */ |
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register SRCREC *src; |
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register OBJREC *so; |
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sphsetsrc( /* set a sphere as a source */ |
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SRCREC *src, |
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OBJREC *so |
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) |
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{ |
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register int i; |
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int i; |
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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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if (so->oargs.nfargs != 4) |
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objerror(so, USER, "bad # arguments"); |
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if (so->oargs.farg[3] <= FTINY) |
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objerror(so, USER, "illegal radius"); |
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objerror(so, USER, "illegal source radius"); |
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src->sflags |= SCIR; |
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VCOPY(src->sloc, so->oargs.farg); |
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src->srad = so->oargs.farg[3]; |
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src->ss2 = PI * src->srad * src->srad; |
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for (i = 0; i < 3; i++) |
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src->ss[SU][i] = src->ss[SV][i] = src->ss[SW][i] = 0.0; |
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for (i = 0; i < 3; i++) |
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src->ss[i][i] = .7236 * so->oargs.farg[3]; |
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src->ss[i][i] = 0.7236 * so->oargs.farg[3]; |
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} |
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void |
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rsetsrc(src, so) /* set a ring (disk) as a source */ |
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register SRCREC *src; |
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< |
OBJREC *so; |
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rsetsrc( /* set a ring (disk) as a source */ |
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> |
SRCREC *src, |
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> |
OBJREC *so |
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) |
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{ |
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register CONE *co; |
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> |
CONE *co; |
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|
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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 ring */ |
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co = getcone(so, 0); |
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if (CO_R1(co) <= FTINY) |
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objerror(so, USER, "illegal source radius"); |
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VCOPY(src->sloc, CO_P0(co)); |
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if (CO_R0(co) > 0.0) |
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objerror(so, USER, "cannot hit center"); |
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src->sflags |= SFLAT; |
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objerror(so, USER, "cannot hit source center"); |
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> |
src->sflags |= (SFLAT|SCIR); |
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VCOPY(src->snorm, co->ad); |
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src->srad = CO_R1(co); |
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src->ss2 = PI * src->srad * src->srad; |
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void |
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cylsetsrc(src, so) /* set a cylinder as a source */ |
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< |
register SRCREC *src; |
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OBJREC *so; |
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> |
cylsetsrc( /* set a cylinder as a source */ |
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SRCREC *src, |
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OBJREC *so |
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) |
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{ |
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< |
register CONE *co; |
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register int i; |
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CONE *co; |
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int i; |
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src->sa.success = 4*AIMREQT-1; /* bitch on fourth failure */ |
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src->so = so; |
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/* get the cylinder */ |
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co = getcone(so, 0); |
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if (CO_R0(co) <= FTINY) |
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objerror(so, USER, "illegal source radius"); |
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if (CO_R0(co) > .2*co->al) /* heuristic constraint */ |
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objerror(so, WARNING, "source aspect too small"); |
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src->sflags |= SCYL; |
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SPOT * |
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< |
makespot(m) /* make a spotlight */ |
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< |
register OBJREC *m; |
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> |
makespot( /* make a spotlight */ |
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OBJREC *m |
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) |
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{ |
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< |
register SPOT *ns; |
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> |
SPOT *ns; |
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|
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if ((ns = (SPOT *)m->os) != NULL) |
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return(ns); |
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if ((ns = (SPOT *)malloc(sizeof(SPOT))) == NULL) |
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return(NULL); |
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if (m->oargs.farg[3] <= FTINY) |
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objerror(m, USER, "zero angle"); |
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ns->siz = 2.0*PI * (1.0 - cos(PI/180.0/2.0 * m->oargs.farg[3])); |
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VCOPY(ns->aim, m->oargs.farg+4); |
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if ((ns->flen = normalize(ns->aim)) == 0.0) |
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int |
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spotout(r, s) /* check if we're outside spot region */ |
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< |
register RAY *r; |
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< |
register SPOT *s; |
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> |
spotout( /* check if we're outside spot region */ |
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> |
RAY *r, |
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> |
SPOT *s |
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> |
) |
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{ |
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double d; |
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FVECT vd; |
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double |
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fgetmaxdisk(ocent, op) /* get center and squared radius of face */ |
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< |
FVECT ocent; |
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< |
OBJREC *op; |
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> |
fgetmaxdisk( /* get center and squared radius of face */ |
310 |
> |
FVECT ocent, |
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> |
OBJREC *op |
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) |
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{ |
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double maxrad2; |
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double d; |
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< |
register int i, j; |
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< |
register FACE *f; |
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> |
int i, j; |
317 |
> |
FACE *f; |
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|
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f = getface(op); |
320 |
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if (f->area == 0.) |
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|
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|
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double |
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rgetmaxdisk(ocent, op) /* get center and squared radius of ring */ |
343 |
< |
FVECT ocent; |
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< |
OBJREC *op; |
342 |
> |
rgetmaxdisk( /* get center and squared radius of ring */ |
343 |
> |
FVECT ocent, |
344 |
> |
OBJREC *op |
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> |
) |
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{ |
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< |
register CONE *co; |
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> |
CONE *co; |
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|
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co = getcone(op, 0); |
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VCOPY(ocent, CO_P0(co)); |
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double |
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< |
fgetplaneq(nvec, op) /* get plane equation for face */ |
357 |
< |
FVECT nvec; |
358 |
< |
OBJREC *op; |
356 |
> |
fgetplaneq( /* get plane equation for face */ |
357 |
> |
FVECT nvec, |
358 |
> |
OBJREC *op |
359 |
> |
) |
360 |
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{ |
361 |
< |
register FACE *fo; |
361 |
> |
FACE *fo; |
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|
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fo = getface(op); |
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VCOPY(nvec, fo->norm); |
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|
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|
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double |
370 |
< |
rgetplaneq(nvec, op) /* get plane equation for ring */ |
371 |
< |
FVECT nvec; |
372 |
< |
OBJREC *op; |
370 |
> |
rgetplaneq( /* get plane equation for ring */ |
371 |
> |
FVECT nvec, |
372 |
> |
OBJREC *op |
373 |
> |
) |
374 |
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{ |
375 |
< |
register CONE *co; |
375 |
> |
CONE *co; |
376 |
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|
377 |
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co = getcone(op, 0); |
378 |
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VCOPY(nvec, co->ad); |
381 |
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|
382 |
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|
383 |
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int |
384 |
< |
commonspot(sp1, sp2, org) /* set sp1 to intersection of sp1 and sp2 */ |
385 |
< |
register SPOT *sp1, *sp2; |
386 |
< |
FVECT org; |
384 |
> |
commonspot( /* set sp1 to intersection of sp1 and sp2 */ |
385 |
> |
SPOT *sp1, |
386 |
> |
SPOT *sp2, |
387 |
> |
FVECT org |
388 |
> |
) |
389 |
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{ |
390 |
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FVECT cent; |
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double rad2, cos1, cos2; |
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|
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|
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int |
410 |
< |
commonbeam(sp1, sp2, dir) /* set sp1 to intersection of sp1 and sp2 */ |
411 |
< |
register SPOT *sp1, *sp2; |
412 |
< |
FVECT dir; |
410 |
> |
commonbeam( /* set sp1 to intersection of sp1 and sp2 */ |
411 |
> |
SPOT *sp1, |
412 |
> |
SPOT *sp2, |
413 |
> |
FVECT dir |
414 |
> |
) |
415 |
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{ |
416 |
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FVECT cent, c1, c2; |
417 |
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double rad2, d; |
393 |
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register int i; |
418 |
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/* move centers to common plane */ |
419 |
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d = DOT(sp1->aim, dir); |
420 |
< |
for (i = 0; i < 3; i++) |
397 |
< |
c1[i] = sp1->aim[i] - d*dir[i]; |
420 |
> |
VSUM(c1, sp1->aim, dir, -d); |
421 |
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d = DOT(sp2->aim, dir); |
422 |
< |
for (i = 0; i < 3; i++) |
400 |
< |
c2[i] = sp2->aim[i] - d*dir[i]; |
422 |
> |
VSUM(c2, sp2->aim, dir, -d); |
423 |
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/* compute overlap */ |
424 |
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rad2 = intercircle(cent, c1, c2, sp1->siz/PI, sp2->siz/PI); |
425 |
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if (rad2 <= FTINY) |
431 |
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|
432 |
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|
433 |
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int |
434 |
< |
checkspot(sp, nrm) /* check spotlight for behind source */ |
435 |
< |
register SPOT *sp; /* spotlight */ |
436 |
< |
FVECT nrm; /* source surface normal */ |
434 |
> |
checkspot( /* check spotlight for behind source */ |
435 |
> |
SPOT *sp, /* spotlight */ |
436 |
> |
FVECT nrm /* source surface normal */ |
437 |
> |
) |
438 |
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{ |
439 |
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double d, d1; |
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|
448 |
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|
449 |
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|
450 |
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double |
451 |
< |
spotdisk(oc, op, sp, pos) /* intersect spot with object op */ |
452 |
< |
FVECT oc; |
453 |
< |
OBJREC *op; |
454 |
< |
register SPOT *sp; |
455 |
< |
FVECT pos; |
451 |
> |
spotdisk( /* intersect spot with object op */ |
452 |
> |
FVECT oc, |
453 |
> |
OBJREC *op, |
454 |
> |
SPOT *sp, |
455 |
> |
FVECT pos |
456 |
> |
) |
457 |
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{ |
458 |
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FVECT onorm; |
459 |
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double offs, d, dist; |
436 |
– |
register int i; |
460 |
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|
461 |
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offs = getplaneq(onorm, op); |
462 |
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d = -DOT(onorm, sp->aim); |
465 |
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dist = (DOT(pos, onorm) - offs)/d; |
466 |
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if (dist < 0.) |
467 |
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return(0.); |
468 |
< |
for (i = 0; i < 3; i++) |
446 |
< |
oc[i] = pos[i] + dist*sp->aim[i]; |
468 |
> |
VSUM(oc, pos, sp->aim, dist); |
469 |
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return(sp->siz*dist*dist/PI/(d*d)); |
470 |
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} |
471 |
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|
472 |
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|
473 |
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double |
474 |
< |
beamdisk(oc, op, sp, dir) /* intersect beam with object op */ |
475 |
< |
FVECT oc; |
476 |
< |
OBJREC *op; |
477 |
< |
register SPOT *sp; |
478 |
< |
FVECT dir; |
474 |
> |
beamdisk( /* intersect beam with object op */ |
475 |
> |
FVECT oc, |
476 |
> |
OBJREC *op, |
477 |
> |
SPOT *sp, |
478 |
> |
FVECT dir |
479 |
> |
) |
480 |
|
{ |
481 |
|
FVECT onorm; |
482 |
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double offs, d, dist; |
460 |
– |
register int i; |
483 |
|
|
484 |
|
offs = getplaneq(onorm, op); |
485 |
|
d = -DOT(onorm, dir); |
486 |
|
if (d >= -FTINY && d <= FTINY) |
487 |
|
return(0.); |
488 |
|
dist = (DOT(sp->aim, onorm) - offs)/d; |
489 |
< |
for (i = 0; i < 3; i++) |
468 |
< |
oc[i] = sp->aim[i] + dist*dir[i]; |
489 |
> |
VSUM(oc, sp->aim, dir, dist); |
490 |
|
return(sp->siz/PI/(d*d)); |
491 |
|
} |
492 |
|
|
493 |
|
|
494 |
|
double |
495 |
< |
intercircle(cc, c1, c2, r1s, r2s) /* intersect two circles */ |
496 |
< |
FVECT cc; /* midpoint (return value) */ |
497 |
< |
FVECT c1, c2; /* circle centers */ |
498 |
< |
double r1s, r2s; /* radii squared */ |
495 |
> |
intercircle( /* intersect two circles */ |
496 |
> |
FVECT cc, /* midpoint (return value) */ |
497 |
> |
FVECT c1, /* circle centers */ |
498 |
> |
FVECT c2, |
499 |
> |
double r1s, /* radii squared */ |
500 |
> |
double r2s |
501 |
> |
) |
502 |
|
{ |
503 |
|
double a2, d2, l; |
504 |
|
FVECT disp; |
481 |
– |
register int i; |
505 |
|
|
506 |
< |
for (i = 0; i < 3; i++) |
484 |
< |
disp[i] = c2[i] - c1[i]; |
506 |
> |
VSUB(disp, c2, c1); |
507 |
|
d2 = DOT(disp,disp); |
508 |
|
/* circle within overlap? */ |
509 |
|
if (r1s < r2s) { |
523 |
|
return(0.); |
524 |
|
/* overlap, compute center */ |
525 |
|
l = sqrt((r1s - a2)/d2); |
526 |
< |
for (i = 0; i < 3; i++) |
505 |
< |
cc[i] = c1[i] + l*disp[i]; |
526 |
> |
VSUM(cc, c1, disp, l); |
527 |
|
return(a2); |
528 |
|
} |