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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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static const char RCSid[] = "$Id$"; |
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#endif |
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|
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/* |
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* Routines to do the actual calculation for mkillum |
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*/ |
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#include "mkillum.h" |
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#include <string.h> |
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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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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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static void mkaxes(FVECT u, FVECT v, FVECT n); |
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static void rounddir(FVECT dv, double alt, double azi); |
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static void flatdir(FVECT dv, double alt, double azi); |
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|
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|
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static COLORV * distarr = NULL; /* distribution array */ |
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static int distsiz = 0; |
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|
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|
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static void |
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newdist( /* allocate & clear distribution array */ |
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int siz |
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) |
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{ |
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if (siz == 0) { |
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if (distsiz > 0) |
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free((void *)distarr); |
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distarr = NULL; |
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distsiz = 0; |
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return; |
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} |
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if (distsiz < siz) { |
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free((void *)distarr); |
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distarr = (COLORV *)malloc(sizeof(COLORV)*3*siz); |
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if (distarr == NULL) |
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error(SYSTEM, "Out of memory in distalloc"); |
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distsiz = siz; |
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} |
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memset(distarr, '\0', sizeof(COLORV)*3*siz); |
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} |
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|
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|
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static int |
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process_ray(RAY *r, int rv) |
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{ |
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COLORV *colp; |
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|
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if (rv == 0) |
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return(0); |
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if (rv < 0) |
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error(USER, "Ray tracing process died"); |
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if (r->rno >= distsiz) |
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error(INTERNAL, "Bad returned index in process_ray"); |
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colp = &distarr[r->rno * 3]; |
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addcolor(colp, r->rcol); |
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return(1); |
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} |
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|
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|
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static void |
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raysamp( /* queue a ray sample */ |
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int ndx, |
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FVECT org, |
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FVECT dir |
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) |
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{ |
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RAY myRay; |
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int rv; |
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|
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if ((ndx < 0) | (ndx >= distsiz)) |
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error(INTERNAL, "Bad index in raysamp"); |
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VCOPY(myRay.rorg, org); |
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VCOPY(myRay.rdir, dir); |
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myRay.rmax = .0; |
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rayorigin(&myRay, PRIMARY, NULL, NULL); |
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myRay.rno = ndx; |
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/* queue ray, check result */ |
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process_ray(&myRay, ray_pqueue(&myRay)); |
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} |
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|
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|
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static void |
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rayclean() /* finish all pending rays */ |
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{ |
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RAY myRay; |
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|
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while (process_ray(&myRay, ray_presult(&myRay, 0))) |
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; |
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} |
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|
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|
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int /* XXX type conflict with otypes.h */ |
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my_default( /* default illum action */ |
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OBJREC *ob, |
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struct illum_args *il, |
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char *nm |
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) |
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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->altmat, ob); |
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printobj(il->altmat, ob); |
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return(1); |
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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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int |
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my_face( /* make an illum face */ |
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OBJREC *ob, |
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struct illum_args *il, |
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char *nm |
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) |
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{ |
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#define MAXMISS (5*n*il->nsamps) |
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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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int dim[3]; |
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int n, nalt, nazi, h; |
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double sp[2], r1, r2; |
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FVECT dn, org, dir; |
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FVECT u, v; |
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double ur[2], vr[2]; |
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fa = getface(ob); |
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if (fa->area == 0.0) { |
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freeface(ob); |
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o_default(ob, il, rt, nm); |
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return; |
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return(o_default(ob, il, nm)); |
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} |
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/* set up sampling */ |
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n = PI * il->sampdens; |
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nalt = sqrt(n/PI) + .5; |
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nazi = PI*nalt + .5; |
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if (il->sampdens <= 0) |
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nalt = nazi = 1; |
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else { |
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n = PI * il->sampdens; |
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nalt = sqrt(n/PI) + .5; |
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nazi = PI*nalt + .5; |
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} |
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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_face"); |
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mkaxes(u, v, fa->norm); |
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newdist(n); |
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/* take first edge longer than sqrt(area) */ |
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for (j = fa->nv-1, i = 0; i < fa->nv; j = i++) { |
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u[0] = VERTEX(fa,i)[0] - VERTEX(fa,j)[0]; |
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u[1] = VERTEX(fa,i)[1] - VERTEX(fa,j)[1]; |
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u[2] = VERTEX(fa,i)[2] - VERTEX(fa,j)[2]; |
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if ((r1 = DOT(u,u)) >= fa->area-FTINY) |
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break; |
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} |
153 |
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if (i < fa->nv) { /* got one! -- let's align our axes */ |
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r2 = 1.0/sqrt(r1); |
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u[0] *= r2; u[1] *= r2; u[2] *= r2; |
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fcross(v, fa->norm, u); |
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} else /* oh well, we'll just have to wing it */ |
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mkaxes(u, v, fa->norm); |
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/* now, find limits in (u,v) coordinates */ |
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ur[0] = vr[0] = FHUGE; |
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ur[1] = vr[1] = -FHUGE; |
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for (i = 0; i < fa->nv; i++) { |
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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)))/nazi; |
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h = ilhash(dim, 3) + i; |
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multisamp(sp, 2, urand(h)); |
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r1 = (dim[1] + sp[0])/nalt; |
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r2 = (dim[2] + sp[1] - .5)/nazi; |
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flatdir(dn, r1, r2); |
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for (j = 0; j < 3; j++) |
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dir[j] = -dn[0]*u[j] - dn[1]*v[j] - dn[2]*fa->norm[j]; |
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/* random location */ |
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do { |
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dim[3] = 3; |
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r1 = ur[0] + (ur[1]-ur[0]) * |
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urand(urind(ilhash(dim,4),i+nmisses)); |
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dim[3] = 4; |
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r2 = vr[0] + (vr[1]-vr[0]) * |
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urand(urind(ilhash(dim,4),i+nmisses)); |
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multisamp(sp, 2, urand(h+4862+nmisses)); |
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r1 = ur[0] + (ur[1]-ur[0]) * sp[0]; |
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r2 = vr[0] + (vr[1]-vr[0]) * sp[1]; |
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for (j = 0; j < 3; j++) |
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org[j] = r1*u[j] + r2*v[j] |
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+ fa->offset*fa->norm[j]; |
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} while (!inface(org, fa) && nmisses++ < MAXMISS); |
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if (nmisses > MAXMISS) { |
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objerror(ob, WARNING, "bad aspect"); |
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rt->nrays = 0; |
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rayclean(); |
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freeface(ob); |
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free((char *)distarr); |
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o_default(ob, il, rt, nm); |
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return; |
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free((void *)distarr); |
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return(o_default(ob, il, nm)); |
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} |
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for (j = 0; j < 3; j++) |
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org[j] += .001*fa->norm[j]; |
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/* send sample */ |
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raysamp(distarr+3*(dim[1]*nazi+dim[2]), org, dir, rt); |
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raysamp(dim[1]*nazi+dim[2], org, dir); |
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} |
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rayflush(rt); |
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/* write out the face w/ distribution */ |
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flatout(il, distarr, nalt, nazi, u, v, fa->norm); |
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illumout(il, ob); |
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rayclean(); |
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/* write out the face and its distribution */ |
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if (average(il, distarr, nalt*nazi)) { |
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if (il->sampdens > 0) |
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flatout(il, distarr, nalt, nazi, u, v, fa->norm); |
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illumout(il, ob); |
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} else |
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printobj(il->altmat, ob); |
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/* clean up */ |
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freeface(ob); |
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< |
free((char *)distarr); |
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> |
return(0); |
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#undef MAXMISS |
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} |
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|
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< |
o_sphere(ob, il, rt, nm) /* make an illum sphere */ |
221 |
< |
register OBJREC *ob; |
222 |
< |
struct illum_args *il; |
223 |
< |
struct rtproc *rt; |
224 |
< |
char *nm; |
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> |
int |
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my_sphere( /* make an illum sphere */ |
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register OBJREC *ob, |
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> |
struct illum_args *il, |
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char *nm |
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) |
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{ |
227 |
< |
int dim[4]; |
227 |
> |
int dim[3]; |
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int n, nalt, nazi; |
229 |
< |
float *distarr; |
136 |
< |
double r1, r2, r3; |
229 |
> |
double sp[4], r1, r2, r3; |
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FVECT org, dir; |
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FVECT u, v; |
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register int i, j; |
234 |
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if (ob->oargs.nfargs != 4) |
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objerror(ob, USER, "bad # of arguments"); |
236 |
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/* set up sampling */ |
237 |
< |
n = 4.*PI * il->sampdens; |
238 |
< |
nalt = sqrt(n/PI) + .5; |
239 |
< |
nazi = PI*nalt + .5; |
237 |
> |
if (il->sampdens <= 0) |
238 |
> |
nalt = nazi = 1; |
239 |
> |
else { |
240 |
> |
n = 4.*PI * il->sampdens; |
241 |
> |
nalt = sqrt(2./PI*n) + .5; |
242 |
> |
nazi = PI/2.*nalt + .5; |
243 |
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} |
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n = nalt*nazi; |
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< |
distarr = (float *)calloc(n, 3*sizeof(float)); |
149 |
< |
if (distarr == NULL) |
150 |
< |
error(SYSTEM, "out of memory in o_sphere"); |
245 |
> |
newdist(n); |
246 |
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dim[0] = random(); |
247 |
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/* sample sphere */ |
248 |
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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]++) |
250 |
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for (i = 0; i < il->nsamps; i++) { |
251 |
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/* next sample point */ |
252 |
+ |
multisamp(sp, 4, urand(ilhash(dim,3)+i)); |
253 |
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/* random direction */ |
254 |
< |
dim[3] = 1; |
255 |
< |
r1 = (dim[1]+urand(urind(ilhash(dim,4),i)))/nalt; |
159 |
< |
dim[3] = 2; |
160 |
< |
r2 = (dim[2]+urand(urind(ilhash(dim,4),i)))/nazi; |
254 |
> |
r1 = (dim[1] + sp[0])/nalt; |
255 |
> |
r2 = (dim[2] + sp[1] - .5)/nazi; |
256 |
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rounddir(dir, r1, r2); |
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/* random location */ |
258 |
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mkaxes(u, v, dir); /* yuck! */ |
259 |
< |
dim[3] = 3; |
260 |
< |
r3 = sqrt(urand(urind(ilhash(dim,4),i))); |
166 |
< |
dim[3] = 4; |
167 |
< |
r2 = 2.*PI*urand(urind(ilhash(dim,4),i)); |
259 |
> |
r3 = sqrt(sp[2]); |
260 |
> |
r2 = 2.*PI*sp[3]; |
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r1 = r3*ob->oargs.farg[3]*cos(r2); |
262 |
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r2 = r3*ob->oargs.farg[3]*sin(r2); |
263 |
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r3 = ob->oargs.farg[3]*sqrt(1.01-r3*r3); |
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dir[j] = -dir[j]; |
268 |
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} |
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/* send sample */ |
270 |
< |
raysamp(distarr+3*(dim[1]*nazi+dim[2]), org, dir, rt); |
270 |
> |
raysamp(dim[1]*nazi+dim[2], org, dir); |
271 |
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} |
272 |
< |
rayflush(rt); |
273 |
< |
/* write out the sphere w/ distribution */ |
274 |
< |
roundout(il, distarr, nalt, nazi); |
275 |
< |
illumout(il, ob); |
272 |
> |
rayclean(); |
273 |
> |
/* write out the sphere and its distribution */ |
274 |
> |
if (average(il, distarr, nalt*nazi)) { |
275 |
> |
if (il->sampdens > 0) |
276 |
> |
roundout(il, distarr, nalt, nazi); |
277 |
> |
else |
278 |
> |
objerror(ob, WARNING, "diffuse distribution"); |
279 |
> |
illumout(il, ob); |
280 |
> |
} else |
281 |
> |
printobj(il->altmat, ob); |
282 |
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/* clean up */ |
283 |
< |
free((char *)distarr); |
283 |
> |
return(1); |
284 |
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} |
285 |
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|
286 |
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|
287 |
< |
o_ring(ob, il, rt, nm) /* make an illum ring */ |
288 |
< |
OBJREC *ob; |
289 |
< |
struct illum_args *il; |
290 |
< |
struct rtproc *rt; |
291 |
< |
char *nm; |
287 |
> |
int |
288 |
> |
my_ring( /* make an illum ring */ |
289 |
> |
OBJREC *ob, |
290 |
> |
struct illum_args *il, |
291 |
> |
char *nm |
292 |
> |
) |
293 |
|
{ |
294 |
< |
int dim[4]; |
294 |
> |
int dim[3]; |
295 |
|
int n, nalt, nazi; |
296 |
< |
float *distarr; |
197 |
< |
double r1, r2, r3; |
296 |
> |
double sp[4], r1, r2, r3; |
297 |
|
FVECT dn, org, dir; |
298 |
|
FVECT u, v; |
299 |
|
register CONE *co; |
301 |
|
/* get/check arguments */ |
302 |
|
co = getcone(ob, 0); |
303 |
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/* set up sampling */ |
304 |
< |
n = PI * il->sampdens; |
305 |
< |
nalt = sqrt(n/PI) + .5; |
306 |
< |
nazi = PI*nalt + .5; |
304 |
> |
if (il->sampdens <= 0) |
305 |
> |
nalt = nazi = 1; |
306 |
> |
else { |
307 |
> |
n = PI * il->sampdens; |
308 |
> |
nalt = sqrt(n/PI) + .5; |
309 |
> |
nazi = PI*nalt + .5; |
310 |
> |
} |
311 |
|
n = nalt*nazi; |
312 |
< |
distarr = (float *)calloc(n, 3*sizeof(float)); |
210 |
< |
if (distarr == NULL) |
211 |
< |
error(SYSTEM, "out of memory in o_ring"); |
312 |
> |
newdist(n); |
313 |
|
mkaxes(u, v, co->ad); |
314 |
|
dim[0] = random(); |
315 |
|
/* sample disk */ |
316 |
|
for (dim[1] = 0; dim[1] < nalt; dim[1]++) |
317 |
|
for (dim[2] = 0; dim[2] < nazi; dim[2]++) |
318 |
|
for (i = 0; i < il->nsamps; i++) { |
319 |
+ |
/* next sample point */ |
320 |
+ |
multisamp(sp, 4, urand(ilhash(dim,3)+i)); |
321 |
|
/* random direction */ |
322 |
< |
dim[3] = 1; |
323 |
< |
r1 = (dim[1]+urand(urind(ilhash(dim,4),i)))/nalt; |
221 |
< |
dim[3] = 2; |
222 |
< |
r2 = (dim[2]+urand(urind(ilhash(dim,4),i)))/nalt; |
322 |
> |
r1 = (dim[1] + sp[0])/nalt; |
323 |
> |
r2 = (dim[2] + sp[1] - .5)/nazi; |
324 |
|
flatdir(dn, r1, r2); |
325 |
|
for (j = 0; j < 3; j++) |
326 |
|
dir[j] = -dn[0]*u[j] - dn[1]*v[j] - dn[2]*co->ad[j]; |
327 |
|
/* random location */ |
227 |
– |
dim[3] = 3; |
328 |
|
r3 = sqrt(CO_R0(co)*CO_R0(co) + |
329 |
< |
urand(urind(ilhash(dim,4),i))* |
330 |
< |
(CO_R1(co)*CO_R1(co) - CO_R0(co)*CO_R0(co))); |
231 |
< |
dim[3] = 4; |
232 |
< |
r2 = 2.*PI*urand(urind(ilhash(dim,4),i)); |
329 |
> |
sp[2]*(CO_R1(co)*CO_R1(co) - CO_R0(co)*CO_R0(co))); |
330 |
> |
r2 = 2.*PI*sp[3]; |
331 |
|
r1 = r3*cos(r2); |
332 |
|
r2 = r3*sin(r2); |
333 |
|
for (j = 0; j < 3; j++) |
334 |
< |
org[j] = CO_P0(co)[j] + r1*u[j] + r1*v[j] + |
334 |
> |
org[j] = CO_P0(co)[j] + r1*u[j] + r2*v[j] + |
335 |
|
.001*co->ad[j]; |
336 |
|
|
337 |
|
/* send sample */ |
338 |
< |
raysamp(distarr+3*(dim[1]*nazi+dim[2]), org, dir, rt); |
338 |
> |
raysamp(dim[1]*nazi+dim[2], org, dir); |
339 |
|
} |
340 |
< |
rayflush(rt); |
341 |
< |
/* write out the ring w/ distribution */ |
342 |
< |
flatout(il, distarr, nalt, nazi, u, v, co->ad); |
343 |
< |
illumout(il, ob); |
340 |
> |
rayclean(); |
341 |
> |
/* write out the ring and its distribution */ |
342 |
> |
if (average(il, distarr, nalt*nazi)) { |
343 |
> |
if (il->sampdens > 0) |
344 |
> |
flatout(il, distarr, nalt, nazi, u, v, co->ad); |
345 |
> |
illumout(il, ob); |
346 |
> |
} else |
347 |
> |
printobj(il->altmat, ob); |
348 |
|
/* clean up */ |
349 |
|
freecone(ob); |
350 |
< |
free((char *)distarr); |
350 |
> |
return(1); |
351 |
|
} |
352 |
|
|
353 |
|
|
354 |
< |
raysamp(res, org, dir, rt) /* compute a ray sample */ |
355 |
< |
float res[3]; |
356 |
< |
FVECT org, dir; |
357 |
< |
register struct rtproc *rt; |
354 |
> |
static void |
355 |
> |
mkaxes( /* compute u and v to go with n */ |
356 |
> |
FVECT u, |
357 |
> |
FVECT v, |
358 |
> |
FVECT n |
359 |
> |
) |
360 |
|
{ |
257 |
– |
register float *fp; |
258 |
– |
|
259 |
– |
if (rt->nrays == rt->bsiz) |
260 |
– |
rayflush(rt); |
261 |
– |
rt->dest[rt->nrays] = res; |
262 |
– |
fp = rt->buf + 6*rt->nrays++; |
263 |
– |
*fp++ = org[0]; *fp++ = org[1]; *fp++ = org[2]; |
264 |
– |
*fp++ = dir[0]; *fp++ = dir[1]; *fp = dir[2]; |
265 |
– |
} |
266 |
– |
|
267 |
– |
|
268 |
– |
rayflush(rt) /* flush buffered rays */ |
269 |
– |
register struct rtproc *rt; |
270 |
– |
{ |
361 |
|
register int i; |
362 |
|
|
273 |
– |
if (rt->nrays <= 0) |
274 |
– |
return; |
275 |
– |
i = 6*rt->nrays + 3; |
276 |
– |
rt->buf[i++] = 0.; rt->buf[i++] = 0.; rt->buf[i] = 0.; |
277 |
– |
if ( process(rt->pd, (char *)rt->buf, (char *)rt->buf, |
278 |
– |
3*sizeof(float)*rt->nrays, |
279 |
– |
6*sizeof(float)*(rt->nrays+1)) < |
280 |
– |
3*sizeof(float)*rt->nrays ) |
281 |
– |
error(SYSTEM, "error reading from rtrace process"); |
282 |
– |
i = rt->nrays; |
283 |
– |
while (i--) { |
284 |
– |
rt->dest[i][0] += rt->buf[3*i]; |
285 |
– |
rt->dest[i][1] += rt->buf[3*i+1]; |
286 |
– |
rt->dest[i][2] += rt->buf[3*i+2]; |
287 |
– |
} |
288 |
– |
rt->nrays = 0; |
289 |
– |
} |
290 |
– |
|
291 |
– |
|
292 |
– |
mkaxes(u, v, n) /* compute u and v to go with n */ |
293 |
– |
FVECT u, v, n; |
294 |
– |
{ |
295 |
– |
register int i; |
296 |
– |
|
363 |
|
v[0] = v[1] = v[2] = 0.0; |
364 |
|
for (i = 0; i < 3; i++) |
365 |
|
if (n[i] < 0.6 && n[i] > -0.6) |
371 |
|
} |
372 |
|
|
373 |
|
|
374 |
< |
rounddir(dv, alt, azi) /* compute uniform spherical direction */ |
375 |
< |
register FVECT dv; |
376 |
< |
double alt, azi; |
374 |
> |
static void |
375 |
> |
rounddir( /* compute uniform spherical direction */ |
376 |
> |
register FVECT dv, |
377 |
> |
double alt, |
378 |
> |
double azi |
379 |
> |
) |
380 |
|
{ |
381 |
|
double d1, d2; |
382 |
|
|
388 |
|
} |
389 |
|
|
390 |
|
|
391 |
< |
flatdir(dv, alt, azi) /* compute uniform hemispherical direction */ |
392 |
< |
register FVECT dv; |
393 |
< |
double alt, azi; |
391 |
> |
static void |
392 |
> |
flatdir( /* compute uniform hemispherical direction */ |
393 |
> |
register FVECT dv, |
394 |
> |
double alt, |
395 |
> |
double azi |
396 |
> |
) |
397 |
|
{ |
398 |
|
double d1, d2; |
399 |
|
|