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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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*/ |
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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 fndx(m) ((m)->otype == MAT_DIRECT1 ? 4 : 8) |
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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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static |
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dir_check(m) /* check arguments and load function file */ |
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register OBJREC *m; |
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{ |
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register FULLXF *mxf; |
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register int ff; |
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|
| 49 |
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ff = fndx(m)+1; |
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if (ff > m->oargs.nsargs) |
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objerror(m, USER, "too few arguments"); |
| 52 |
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if (m->os == NULL) { |
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mxf = (FULLXF *)malloc(sizeof(FULLXF)); |
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if (mxf == NULL) |
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error(SYSTEM, "out of memory in dir_check"); |
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if (fullxf(mxf, m->oargs.nsargs-ff, m->oargs.sarg+ff) != |
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– |
m->oargs.nsargs-ff) |
| 58 |
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objerror(m, USER, "bad transform"); |
| 59 |
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if (mxf->f.sca < 0.0) |
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mxf->f.sca = -mxf->f.sca; |
| 61 |
– |
if (mxf->b.sca < 0.0) |
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– |
mxf->b.sca = -mxf->b.sca; |
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– |
m->os = (char *)mxf; |
| 64 |
– |
} |
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– |
} |
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– |
|
| 67 |
– |
|
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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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/* 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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– |
dir_check(m); |
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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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RAY *r; |
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int n; |
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{ |
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< |
register char **sa; |
| 67 |
> |
MFUNC *mf; |
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> |
register EPNODE **va; |
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RAY nr; |
| 70 |
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double coef; |
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register int j; |
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/* set up function */ |
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< |
setmap(m, r, &((FULLXF *)m->os)->b); |
| 74 |
< |
funcfile(m->oargs.sarg[fndx(m)]); |
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< |
sa = m->oargs.sarg + 4*n; |
| 73 |
> |
mf = getdfunc(m); |
| 74 |
> |
setfunc(m, r); |
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/* compute coefficient */ |
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errno = 0; |
| 77 |
< |
coef = varvalue(sa[0]); |
| 77 |
> |
va = mf->ep + 4*n; |
| 78 |
> |
coef = evalue(va[0]); |
| 79 |
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if (errno) |
| 80 |
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goto computerr; |
| 81 |
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if (coef <= FTINY || rayorigin(&nr, r, TRANS, coef) < 0) |
| 82 |
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return(0); |
| 83 |
< |
/* compute direction */ |
| 84 |
< |
errno = 0; |
| 85 |
< |
for (j = 0; j < 3; j++) |
| 86 |
< |
nr.rdir[j] = varvalue(sa[j+1]); |
| 87 |
< |
if (errno) |
| 88 |
< |
goto computerr; |
| 89 |
< |
multv3(nr.rdir, nr.rdir, ((FULLXF *)m->os)->f.xfm); |
| 83 |
> |
va++; /* compute direction */ |
| 84 |
> |
for (j = 0; j < 3; j++) { |
| 85 |
> |
nr.rdir[j] = evalue(va[j]); |
| 86 |
> |
if (errno) |
| 87 |
> |
goto computerr; |
| 88 |
> |
} |
| 89 |
> |
if (mf->f != &unitxf) |
| 90 |
> |
multv3(nr.rdir, nr.rdir, mf->f->xfm); |
| 91 |
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if (r->rox != NULL) |
| 92 |
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multv3(nr.rdir, nr.rdir, r->rox->f.xfm); |
| 93 |
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if (normalize(nr.rdir) == 0.0) |
| 112 |
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int n; |
| 113 |
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{ |
| 114 |
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RAY tr; |
| 115 |
< |
register OBJREC *m; |
| 116 |
< |
char **sa; |
| 115 |
> |
OBJREC *m; |
| 116 |
> |
MFUNC *mf; |
| 117 |
> |
EPNODE **va; |
| 118 |
|
FVECT cent, newdir, nv, h; |
| 119 |
< |
double olddot, newdot, od; |
| 119 |
> |
double coef, olddot, newdot, od; |
| 120 |
|
register int i, j; |
| 143 |
– |
/* get material arguments */ |
| 144 |
– |
m = vsmaterial(o); |
| 145 |
– |
dir_check(m); |
| 146 |
– |
sa = m->oargs.sarg + 4*n; |
| 121 |
|
/* initialize test ray */ |
| 122 |
|
getmaxdisk(cent, o); |
| 123 |
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if (s->sflags & SDISTANT) |
| 141 |
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if (!(*ofun[o->otype].funp)(o, &tr)) |
| 142 |
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return(0); /* no intersection! */ |
| 143 |
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/* compute redirection */ |
| 144 |
< |
setmap(m, &tr, &((FULLXF *)m->os)->b); |
| 145 |
< |
funcfile(m->oargs.sarg[fndx(m)]); |
| 144 |
> |
m = vsmaterial(o); |
| 145 |
> |
mf = getdfunc(m); |
| 146 |
> |
setfunc(m, &tr); |
| 147 |
|
errno = 0; |
| 148 |
< |
if (varvalue(sa[0]) <= FTINY) |
| 149 |
< |
return(0); /* insignificant */ |
| 148 |
> |
va = mf->ep + 4*n; |
| 149 |
> |
coef = evalue(va[0]); |
| 150 |
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if (errno) |
| 151 |
|
goto computerr; |
| 152 |
< |
for (i = 0; i < 3; i++) |
| 153 |
< |
newdir[i] = varvalue(sa[i+1]); |
| 154 |
< |
if (errno) |
| 155 |
< |
goto computerr; |
| 156 |
< |
multv3(newdir, newdir, ((FULLXF *)m->os)->f.xfm); |
| 152 |
> |
if (coef <= FTINY) |
| 153 |
> |
return(0); /* insignificant */ |
| 154 |
> |
va++; |
| 155 |
> |
for (i = 0; i < 3; i++) { |
| 156 |
> |
newdir[i] = evalue(va[i]); |
| 157 |
> |
if (errno) |
| 158 |
> |
goto computerr; |
| 159 |
> |
} |
| 160 |
> |
if (mf->f != &unitxf) |
| 161 |
> |
multv3(newdir, newdir, mf->f->xfm); |
| 162 |
|
/* normalization unnecessary */ |
| 163 |
|
newdot = DOT(newdir, nv); |
| 164 |
|
if (newdot <= FTINY && newdot >= -FTINY) |
