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#include "source.h" |
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#include "func.h" |
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|
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/* |
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* The arguments for MAT_DIRECT1 are: |
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* |
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< |
* 4+ coef1 dx1 dy1 dz1 transform.. |
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* 5+ coef1 dx1 dy1 dz1 funcfile transform.. |
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* 0 |
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* n A1 A2 .. An |
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* |
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* The arguments for MAT_DIRECT2 are: |
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* |
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* 8+ coef1 dx1 dy1 dz1 coef2 dx2 dy2 dz2 transform.. |
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* 9+ coef1 dx1 dy1 dz1 coef2 dx2 dy2 dz2 funcfile transform.. |
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* 0 |
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* n A1 A2 .. An |
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*/ |
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|
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|
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– |
extern double varvalue(); |
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|
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int dir_proj(); |
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VSMATERIAL direct1_vs = {dir_proj, 1}; |
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VSMATERIAL direct2_vs = {dir_proj, 2}; |
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|
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#define getdfunc(m) ( (m)->otype == MAT_DIRECT1 ? \ |
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getfunc(m, 4, 0xf, 1) : \ |
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getfunc(m, 8, 0xff, 1) ) |
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|
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|
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m_direct(m, r) /* shade redirected ray */ |
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register OBJREC *m; |
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register RAY *r; |
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RAY *r; |
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int n; |
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{ |
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< |
register char **sa; |
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MFUNC *mf; |
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register EPNODE **va; |
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> |
FVECT nsdir; |
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RAY nr; |
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double coef; |
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register int j; |
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/* set up function */ |
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mf = getdfunc(m); |
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setfunc(m, r); |
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if (m->oargs.nsargs < 4+4*n) |
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objerror(m, USER, "too few arguments"); |
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sa = m->oargs.sarg + 4*n; |
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/* assign direction variable */ |
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if (r->rsrc >= 0) { |
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register SRCREC *sp = source + source[r->rsrc].sa.sv.sn; |
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> |
|
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> |
if (sp->sflags & SDISTANT) |
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VCOPY(nsdir, sp->sloc); |
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else { |
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for (j = 0; j < 3; j++) |
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nsdir[j] = sp->sloc[j] - r->rop[j]; |
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normalize(nsdir); |
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} |
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if (r->rox != NULL) |
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multv3(nsdir, nsdir, r->rox->b.xfm); |
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if (mf->b != &unitxf) |
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multv3(nsdir, nsdir, mf->b->xfm); |
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> |
} else |
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> |
nsdir[0] = nsdir[1] = nsdir[2] = 0.0; |
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> |
varset("DxA", '=', nsdir[0]); |
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> |
varset("DyA", '=', nsdir[1]); |
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> |
varset("DzA", '=', nsdir[2]); |
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/* compute coefficient */ |
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errno = 0; |
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< |
coef = varvalue(sa[0]); |
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> |
va = mf->ep + 4*n; |
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> |
coef = evalue(va[0]); |
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if (errno) |
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goto computerr; |
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if (coef <= FTINY || rayorigin(&nr, r, TRANS, coef) < 0) |
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return(0); |
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< |
/* compute direction */ |
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< |
errno = 0; |
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< |
for (j = 0; j < 3; j++) |
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< |
nr.rdir[j] = varvalue(sa[j+1]); |
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< |
if (errno || normalize(nr.rdir) == 0.0) |
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> |
va++; /* compute direction */ |
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> |
for (j = 0; j < 3; j++) { |
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> |
nr.rdir[j] = evalue(va[j]); |
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> |
if (errno) |
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> |
goto computerr; |
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> |
} |
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> |
if (mf->f != &unitxf) |
| 111 |
> |
multv3(nr.rdir, nr.rdir, mf->f->xfm); |
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> |
if (r->rox != NULL) |
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> |
multv3(nr.rdir, nr.rdir, r->rox->f.xfm); |
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> |
if (normalize(nr.rdir) == 0.0) |
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goto computerr; |
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/* compute value */ |
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if (r->rsrc >= 0) |
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int n; |
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{ |
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RAY tr; |
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< |
register OBJREC *m; |
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< |
char **sa; |
| 136 |
> |
OBJREC *m; |
| 137 |
> |
MFUNC *mf; |
| 138 |
> |
EPNODE **va; |
| 139 |
|
FVECT cent, newdir, nv, h; |
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< |
double olddot, newdot, od; |
| 140 |
> |
double coef, olddot, newdot, od; |
| 141 |
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register int i, j; |
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– |
/* get material arguments */ |
| 111 |
– |
m = objptr(o->omod); |
| 112 |
– |
if (m->oargs.nsargs < 4+4*n) |
| 113 |
– |
objerror(m, USER, "too few arguments"); |
| 114 |
– |
sa = m->oargs.sarg + 4*n; |
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/* initialize test ray */ |
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getmaxdisk(cent, o); |
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if (s->sflags & SDISTANT) |
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else { |
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for (i = 0; i < 3; i++) { |
| 151 |
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tr.rdir[i] = cent[i] - s->sloc[i]; |
| 152 |
< |
tr.rorg[i] = cent[i] - .05*tr.rdir[i]; |
| 152 |
> |
tr.rorg[i] = s->sloc[i]; |
| 153 |
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} |
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if (normalize(tr.rdir) == 0.0) |
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return(0); /* at source! */ |
| 162 |
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if (!(*ofun[o->otype].funp)(o, &tr)) |
| 163 |
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return(0); /* no intersection! */ |
| 164 |
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/* compute redirection */ |
| 165 |
+ |
m = vsmaterial(o); |
| 166 |
+ |
mf = getdfunc(m); |
| 167 |
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setfunc(m, &tr); |
| 168 |
+ |
varset("DxA", '=', 0.0); |
| 169 |
+ |
varset("DyA", '=', 0.0); |
| 170 |
+ |
varset("DzA", '=', 0.0); |
| 171 |
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errno = 0; |
| 172 |
< |
if (varvalue(sa[0]) <= FTINY) |
| 173 |
< |
return(0); /* insignificant */ |
| 172 |
> |
va = mf->ep + 4*n; |
| 173 |
> |
coef = evalue(va[0]); |
| 174 |
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if (errno) |
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goto computerr; |
| 176 |
< |
for (i = 0; i < 3; i++) |
| 177 |
< |
newdir[i] = varvalue(sa[i+1]); |
| 178 |
< |
if (errno) |
| 179 |
< |
goto computerr; |
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> |
if (coef <= FTINY) |
| 177 |
> |
return(0); /* insignificant */ |
| 178 |
> |
va++; |
| 179 |
> |
for (i = 0; i < 3; i++) { |
| 180 |
> |
newdir[i] = evalue(va[i]); |
| 181 |
> |
if (errno) |
| 182 |
> |
goto computerr; |
| 183 |
> |
} |
| 184 |
> |
if (mf->f != &unitxf) |
| 185 |
> |
multv3(newdir, newdir, mf->f->xfm); |
| 186 |
> |
/* normalization unnecessary */ |
| 187 |
|
newdot = DOT(newdir, nv); |
| 188 |
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if (newdot <= FTINY && newdot >= -FTINY) |
| 189 |
|
return(0); /* new dir parallels plane */ |
| 190 |
|
/* everything OK -- compute shear */ |
| 191 |
|
for (i = 0; i < 3; i++) |
| 192 |
< |
h[i] = tr.rdir[i]/olddot + newdir[i]/newdot; |
| 192 |
> |
h[i] = newdir[i]/newdot - tr.rdir[i]/olddot; |
| 193 |
|
setident4(pm); |
| 194 |
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for (j = 0; j < 3; j++) { |
| 195 |
|
for (i = 0; i < 3; i++) |
