| 13 |
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#include "random.h" |
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|
| 15 |
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|
| 16 |
< |
int o_default(FUN_ARGLIST); |
| 17 |
< |
int o_face(FUN_ARGLIST); |
| 18 |
< |
int o_sphere(FUN_ARGLIST); |
| 19 |
< |
int o_ring(FUN_ARGLIST); |
| 20 |
< |
void raysamp(float res[3], FVECT org, FVECT dir, struct rtproc *rt); |
| 21 |
< |
void rayflush(struct rtproc *rt); |
| 22 |
< |
void mkaxes(FVECT u, FVECT v, FVECT n); |
| 23 |
< |
void rounddir(FVECT dv, double alt, double azi); |
| 24 |
< |
void flatdir(FVECT dv, double alt, double azi); |
| 16 |
> |
static void mkaxes(FVECT u, FVECT v, FVECT n); |
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> |
static void rounddir(FVECT dv, double alt, double azi); |
| 18 |
> |
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; |
| 34 |
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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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< |
o_default( /* default illum action */ |
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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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struct rtproc *rt, |
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char *nm |
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) |
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{ |
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|
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|
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int |
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< |
o_face( /* make an illum face */ |
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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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struct rtproc *rt, |
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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[3]; |
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int n, nalt, nazi, h; |
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float *distarr; |
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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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fa = getface(ob); |
| 131 |
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if (fa->area == 0.0) { |
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freeface(ob); |
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< |
return(o_default(ob, il, rt, nm)); |
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> |
return(o_default(ob, il, nm)); |
| 134 |
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} |
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/* set up sampling */ |
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if (il->sampdens <= 0) |
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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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> |
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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} while (!inface(org, fa) && nmisses++ < MAXMISS); |
| 193 |
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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((void *)distarr); |
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< |
return(o_default(ob, il, rt, nm)); |
| 198 |
> |
return(o_default(ob, il, nm)); |
| 199 |
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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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> |
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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printobj(il->altmat, ob); |
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/* clean up */ |
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freeface(ob); |
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– |
free((void *)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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|
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int |
| 221 |
< |
o_sphere( /* make an illum sphere */ |
| 221 |
> |
my_sphere( /* make an illum sphere */ |
| 222 |
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register 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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) |
| 226 |
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{ |
| 227 |
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int dim[3]; |
| 228 |
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int n, nalt, nazi; |
| 166 |
– |
float *distarr; |
| 229 |
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double sp[4], r1, r2, r3; |
| 230 |
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FVECT org, dir; |
| 231 |
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FVECT u, v; |
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nazi = PI/2.*nalt + .5; |
| 243 |
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} |
| 244 |
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n = nalt*nazi; |
| 245 |
< |
distarr = (float *)calloc(n, 3*sizeof(float)); |
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< |
if (distarr == NULL) |
| 185 |
< |
error(SYSTEM, "out of memory in o_sphere"); |
| 245 |
> |
newdist(n); |
| 246 |
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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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dir[j] = -dir[j]; |
| 268 |
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} |
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/* send sample */ |
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< |
raysamp(distarr+3*(dim[1]*nazi+dim[2]), org, dir, rt); |
| 270 |
> |
raysamp(dim[1]*nazi+dim[2], org, dir); |
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} |
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< |
rayflush(rt); |
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> |
rayclean(); |
| 273 |
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/* write out the sphere and its distribution */ |
| 274 |
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if (average(il, distarr, nalt*nazi)) { |
| 275 |
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if (il->sampdens > 0) |
| 280 |
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} else |
| 281 |
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printobj(il->altmat, ob); |
| 282 |
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/* clean up */ |
| 223 |
– |
free((void *)distarr); |
| 283 |
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return(1); |
| 284 |
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} |
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|
| 286 |
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|
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int |
| 288 |
< |
o_ring( /* make an illum ring */ |
| 288 |
> |
my_ring( /* make an illum ring */ |
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OBJREC *ob, |
| 290 |
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struct illum_args *il, |
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– |
struct rtproc *rt, |
| 291 |
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char *nm |
| 292 |
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) |
| 293 |
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{ |
| 294 |
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int dim[3]; |
| 295 |
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int n, nalt, nazi; |
| 238 |
– |
float *distarr; |
| 296 |
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double sp[4], r1, r2, r3; |
| 297 |
|
FVECT dn, org, dir; |
| 298 |
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FVECT u, v; |
| 309 |
|
nazi = PI*nalt + .5; |
| 310 |
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} |
| 311 |
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n = nalt*nazi; |
| 312 |
< |
distarr = (float *)calloc(n, 3*sizeof(float)); |
| 256 |
< |
if (distarr == NULL) |
| 257 |
< |
error(SYSTEM, "out of memory in o_ring"); |
| 312 |
> |
newdist(n); |
| 313 |
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mkaxes(u, v, co->ad); |
| 314 |
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dim[0] = random(); |
| 315 |
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/* sample disk */ |
| 335 |
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.001*co->ad[j]; |
| 336 |
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|
| 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 |
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} |
| 340 |
< |
rayflush(rt); |
| 340 |
> |
rayclean(); |
| 341 |
|
/* write out the ring and its distribution */ |
| 342 |
|
if (average(il, distarr, nalt*nazi)) { |
| 343 |
|
if (il->sampdens > 0) |
| 347 |
|
printobj(il->altmat, ob); |
| 348 |
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/* clean up */ |
| 349 |
|
freecone(ob); |
| 295 |
– |
free((void *)distarr); |
| 350 |
|
return(1); |
| 351 |
|
} |
| 352 |
|
|
| 353 |
|
|
| 354 |
< |
void |
| 301 |
< |
raysamp( /* compute a ray sample */ |
| 302 |
< |
float res[3], |
| 303 |
< |
FVECT org, |
| 304 |
< |
FVECT dir, |
| 305 |
< |
register struct rtproc *rt |
| 306 |
< |
) |
| 307 |
< |
{ |
| 308 |
< |
register float *fp; |
| 309 |
< |
|
| 310 |
< |
if (rt->nrays == rt->bsiz) |
| 311 |
< |
rayflush(rt); |
| 312 |
< |
rt->dest[rt->nrays] = res; |
| 313 |
< |
fp = rt->buf + 6*rt->nrays++; |
| 314 |
< |
*fp++ = org[0]; *fp++ = org[1]; *fp++ = org[2]; |
| 315 |
< |
*fp++ = dir[0]; *fp++ = dir[1]; *fp = dir[2]; |
| 316 |
< |
} |
| 317 |
< |
|
| 318 |
< |
|
| 319 |
< |
void |
| 320 |
< |
rayflush( /* flush buffered rays */ |
| 321 |
< |
register struct rtproc *rt |
| 322 |
< |
) |
| 323 |
< |
{ |
| 324 |
< |
register int i; |
| 325 |
< |
|
| 326 |
< |
if (rt->nrays <= 0) |
| 327 |
< |
return; |
| 328 |
< |
memset(rt->buf+6*rt->nrays, '\0', 6*sizeof(float)); |
| 329 |
< |
errno = 0; |
| 330 |
< |
if ( process(&(rt->pd), (char *)rt->buf, (char *)rt->buf, |
| 331 |
< |
3*sizeof(float)*(rt->nrays+1), |
| 332 |
< |
6*sizeof(float)*(rt->nrays+1)) < |
| 333 |
< |
3*sizeof(float)*(rt->nrays+1) ) |
| 334 |
< |
error(SYSTEM, "error reading from rtrace process"); |
| 335 |
< |
i = rt->nrays; |
| 336 |
< |
while (i--) { |
| 337 |
< |
rt->dest[i][0] += rt->buf[3*i]; |
| 338 |
< |
rt->dest[i][1] += rt->buf[3*i+1]; |
| 339 |
< |
rt->dest[i][2] += rt->buf[3*i+2]; |
| 340 |
< |
} |
| 341 |
< |
rt->nrays = 0; |
| 342 |
< |
} |
| 343 |
< |
|
| 344 |
< |
|
| 345 |
< |
void |
| 354 |
> |
static void |
| 355 |
|
mkaxes( /* compute u and v to go with n */ |
| 356 |
|
FVECT u, |
| 357 |
|
FVECT v, |
| 371 |
|
} |
| 372 |
|
|
| 373 |
|
|
| 374 |
< |
void |
| 374 |
> |
static void |
| 375 |
|
rounddir( /* compute uniform spherical direction */ |
| 376 |
|
register FVECT dv, |
| 377 |
|
double alt, |
| 388 |
|
} |
| 389 |
|
|
| 390 |
|
|
| 391 |
< |
void |
| 391 |
> |
static void |
| 392 |
|
flatdir( /* compute uniform hemispherical direction */ |
| 393 |
|
register FVECT dv, |
| 394 |
|
double alt, |