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greg |
1.1 |
/* 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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greg |
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#include "random.h"
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greg |
1.1 |
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greg |
1.2 |
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greg |
1.1 |
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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greg |
1.2 |
o_default(ob, il, rt, nm) /* default illum action */
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greg |
1.1 |
OBJREC *ob;
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struct illum_args *il;
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struct rtproc *rt;
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greg |
1.2 |
char *nm;
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greg |
1.1 |
{
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greg |
1.2 |
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 |
}
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