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#include "source.h" |
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|
18 |
+ |
#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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{ |
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/* check if source ray */ |
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if (r->rsrc >= 0 && source[r->rsrc].so != r->ro) |
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return; /* got the wrong guy */ |
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return(1); /* got the wrong guy */ |
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/* compute first projection */ |
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if (m->otype == MAT_DIRECT1 || |
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(r->rsrc < 0 || source[r->rsrc].sa.sv.pn == 0)) |
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if (m->otype == MAT_DIRECT2 && |
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(r->rsrc < 0 || source[r->rsrc].sa.sv.pn == 1)) |
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redirect(m, r, 1); |
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return(1); |
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} |
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|
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|
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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; |
94 |
> |
varset("DxA", '=', nsdir[0]); |
95 |
> |
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; |
100 |
> |
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; |
107 |
< |
for (j = 0; j < 3; j++) |
108 |
< |
nr.rdir[j] = varvalue(sa[j+1]); |
109 |
< |
if (errno || normalize(nr.rdir) == 0.0) |
105 |
> |
va++; /* compute direction */ |
106 |
> |
for (j = 0; j < 3; j++) { |
107 |
> |
nr.rdir[j] = evalue(va[j]); |
108 |
> |
if (errno) |
109 |
> |
goto computerr; |
110 |
> |
} |
111 |
> |
if (mf->f != &unitxf) |
112 |
> |
multv3(nr.rdir, nr.rdir, mf->f->xfm); |
113 |
> |
if (r->rox != NULL) |
114 |
> |
multv3(nr.rdir, nr.rdir, r->rox->f.xfm); |
115 |
> |
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; |
137 |
< |
register OBJREC *m; |
138 |
< |
char **sa; |
137 |
> |
OBJREC *m; |
138 |
> |
MFUNC *mf; |
139 |
> |
EPNODE **va; |
140 |
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FVECT cent, newdir, nv, h; |
141 |
< |
double olddot, newdot, od; |
141 |
> |
double coef, olddot, newdot, od; |
142 |
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register int i, j; |
110 |
– |
/* 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); |
145 |
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if (s->sflags & SDISTANT) |
163 |
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if (!(*ofun[o->otype].funp)(o, &tr)) |
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return(0); /* no intersection! */ |
165 |
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/* compute redirection */ |
166 |
+ |
m = vsmaterial(o); |
167 |
+ |
mf = getdfunc(m); |
168 |
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setfunc(m, &tr); |
169 |
+ |
varset("DxA", '=', 0.0); |
170 |
+ |
varset("DyA", '=', 0.0); |
171 |
+ |
varset("DzA", '=', 0.0); |
172 |
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errno = 0; |
173 |
< |
if (varvalue(sa[0]) <= FTINY) |
174 |
< |
return(0); /* insignificant */ |
173 |
> |
va = mf->ep + 4*n; |
174 |
> |
coef = evalue(va[0]); |
175 |
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if (errno) |
176 |
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goto computerr; |
177 |
< |
for (i = 0; i < 3; i++) |
178 |
< |
newdir[i] = varvalue(sa[i+1]); |
179 |
< |
if (errno) |
180 |
< |
goto computerr; |
177 |
> |
if (coef <= FTINY) |
178 |
> |
return(0); /* insignificant */ |
179 |
> |
va++; |
180 |
> |
for (i = 0; i < 3; i++) { |
181 |
> |
newdir[i] = evalue(va[i]); |
182 |
> |
if (errno) |
183 |
> |
goto computerr; |
184 |
> |
} |
185 |
> |
if (mf->f != &unitxf) |
186 |
> |
multv3(newdir, newdir, mf->f->xfm); |
187 |
> |
/* normalization unnecessary */ |
188 |
|
newdot = DOT(newdir, nv); |
189 |
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if (newdot <= FTINY && newdot >= -FTINY) |
190 |
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return(0); /* new dir parallels plane */ |
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/* everything OK -- compute shear */ |
192 |
|
for (i = 0; i < 3; i++) |
193 |
< |
h[i] = tr.rdir[i]/olddot + newdir[i]/newdot; |
193 |
> |
h[i] = newdir[i]/newdot - tr.rdir[i]/olddot; |
194 |
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setident4(pm); |
195 |
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for (j = 0; j < 3; j++) { |
196 |
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for (i = 0; i < 3; i++) |