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greg |
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/* Copyright (c) 1991 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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#endif |
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/* |
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* Routines to do the actual calcultion and output for mkillum |
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*/ |
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#include "mkillum.h" |
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#include "face.h" |
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#include "cone.h" |
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#include "random.h" |
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printobj(mod, obj) /* print out an object */ |
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char *mod; |
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register OBJREC *obj; |
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{ |
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register int i; |
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printf("\n%s %s %s", mod, ofun[obj->otype].funame, obj->oname); |
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printf("\n%d", obj->oargs.nsargs); |
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for (i = 0; i < obj->oargs.nsargs; i++) |
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printf(" %s", obj->oargs.sarg[i]); |
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#ifdef IARGS |
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printf("\n%d", obj->oargs.niargs); |
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for (i = 0; i < obj->oargs.niargs; i++) |
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printf(" %d", obj->oargs.iarg[i]); |
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#else |
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printf("\n0"); |
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#endif |
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printf("\n%d", obj->oargs.nfargs); |
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for (i = 0; i < obj->oargs.nfargs; i++) { |
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if (i%3 == 0) |
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putchar('\n'); |
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printf(" %18.12g", obj->oargs.farg[i]); |
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} |
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putchar('\n'); |
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} |
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o_default(ob, il, rt, nm) /* default illum action */ |
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OBJREC *ob; |
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struct illum_args *il; |
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struct rtproc *rt; |
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char *nm; |
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{ |
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sprintf(errmsg, "(%s): cannot make illum for %s \"%s\"", |
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nm, ofun[ob->otype].funame, ob->oname); |
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error(WARNING, errmsg); |
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if (!(il->flags & IL_LIGHT)) |
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printobj(il->altname, ob); |
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} |
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o_face(ob, il, rt, nm) /* make an illum face */ |
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OBJREC *ob; |
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struct illum_args *il; |
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struct rtproc *rt; |
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char *nm; |
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{ |
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} |
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o_sphere(ob, il, rt, nm) /* make an illum sphere */ |
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OBJREC *ob; |
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struct illum_args *il; |
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struct rtproc *rt; |
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char *nm; |
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{ |
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int dim[4]; |
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int n, nalt, nazi; |
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float *distarr; |
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double r1, r2; |
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FVECT pos, dir; |
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FVECT u, v; |
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register int i, j; |
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/* check arguments */ |
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if (ob->oargs.nfargs != 4) |
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objerror(ob, USER, "bad # of arguments"); |
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/* set up sampling */ |
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n = 4.*PI * il->sampdens; |
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nalt = sqrt(n/PI) + .5; |
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nazi = PI*nalt + .5; |
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n = nalt*nazi; |
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distarr = (float *)calloc(n, 3*sizeof(float)); |
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if (distarr == NULL) |
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error(SYSTEM, "out of memory in o_sphere"); |
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dim[0] = random(); |
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/* sample sphere */ |
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for (dim[1] = 0; dim[1] < nalt; dim[1]++) |
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for (dim[2] = 0; dim[2] < nazi; dim[2]++) |
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for (i = 0; i < il->nsamps; i++) { |
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/* random direction */ |
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dim[3] = 1; |
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r1 = (dim[1]+urand(urind(ilhash(dim,4),i)))/nalt; |
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dim[3] = 2; |
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r2 = (dim[2]+urand(urind(ilhash(dim,4),i)))/nalt; |
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rounddir(dir, r1, r2); |
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/* random location */ |
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mkaxes(u, v, dir); /* yuck! */ |
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dim[3] = 3; |
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r1 = sqrt(urand(urind(ilhash(dim,4),i))); |
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dim[3] = 4; |
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r2 = 2.*PI*urand(urind(ilhash(dim,4),i)); |
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for (j = 0; j < 3; j++) |
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org[j] = obj->oargs.farg[j] + obj->oargs.farg[3] * |
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( r1*cos(r2)*u[j] + r1*sin(r2)*v[j] |
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- sqrt(1.01-r1*r1)*dir[j] ); |
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/* send sample */ |
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raysamp(distarr+dim[1]*nazi+dim[2], org, dir, rt); |
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} |
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rayflush(rt); |
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/* write out distribution */ |
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rounddist(distarr, nalt, nazi, il, ob); |
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/* clean up */ |
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free((char *)distarr); |
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} |
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o_ring(ob, il, rt, nm) /* make an illum ring */ |
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OBJREC *ob; |
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struct illum_args *il; |
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struct rtproc *rt; |
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char *nm; |
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{ |
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} |
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raysamp(res, org, dir, rt) /* compute a ray sample */ |
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float res[3]; |
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FVECT org, dir; |
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register struct rtproc *rt; |
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{ |
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register float *fp; |
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if (rt->nrays == rt->bsiz) |
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rayflush(rt); |
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rt->dest[rt->nrays] = res; |
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fp = rt->buf + 6*rt->nrays++; |
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*fp++ = org[0]; *fp++ = org[1]; *fp++ = org[2]; |
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*fp++ = dir[0]; *fp++ = dir[1]; *fp = dir[2]; |
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} |
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rayflush(rt) /* flush buffered rays */ |
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register struct rtproc *rt; |
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{ |
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register int i; |
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if (rt->nrays <= 0) |
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return; |
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i = 6*rt->nrays + 3; |
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rt->buf[i++] = 0.; rt->buf[i++] = 0.; rt->buf[i] = 0.; |
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if ( process(rt->pd, (char *)rt->buf, (char *)rt->buf, |
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3*sizeof(float)*rt->nrays, |
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6*sizeof(float)*(rt->nrays+1)) < |
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3*sizeof(float)*rt->nrays ) |
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error(SYSTEM, "error reading from rtrace process"); |
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i = rt->nrays; |
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while (i--) { |
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rt->dest[i][0] += rt->buf[3*i]; |
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rt->dest[i][1] += rt->buf[3*i+1]; |
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rt->dest[i][2] += rt->buf[3*i+2]; |
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} |
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rt->nrays = 0; |
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greg |
1.1 |
} |
