| 8 |
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#include "copyright.h" |
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#include "ray.h" |
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– |
|
| 11 |
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#include "func.h" |
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+ |
#include "rtotypes.h" |
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|
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/* |
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* A procedural texture perturbs the surface normal |
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*/ |
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|
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|
| 31 |
< |
t_func(m, r) /* compute texture for ray */ |
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< |
register OBJREC *m; |
| 33 |
< |
register RAY *r; |
| 31 |
> |
extern int |
| 32 |
> |
t_func( /* compute texture for ray */ |
| 33 |
> |
register OBJREC *m, |
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> |
register RAY *r |
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> |
) |
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{ |
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FVECT disp; |
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double d; |
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errno = 0; |
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for (i = 0; i < 3; i++) { |
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disp[i] = evalue(mf->ep[i]); |
| 49 |
< |
if (errno) { |
| 49 |
> |
if (errno == EDOM || errno == ERANGE) { |
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objerror(m, WARNING, "compute error"); |
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return(0); |
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} |
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} |
| 54 |
< |
if (mf->f != &unitxf) |
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< |
multv3(disp, disp, mf->f->xfm); |
| 54 |
> |
if (mf->fxp != &unitxf) |
| 55 |
> |
multv3(disp, disp, mf->fxp->xfm); |
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if (r->rox != NULL) { |
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multv3(disp, disp, r->rox->f.xfm); |
| 58 |
< |
d = 1.0 / (mf->f->sca * r->rox->f.sca); |
| 58 |
> |
d = 1.0 / (mf->fxp->sca * r->rox->f.sca); |
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} else |
| 60 |
< |
d = 1.0 / mf->f->sca; |
| 61 |
< |
for (i = 0; i < 3; i++) |
| 60 |
< |
r->pert[i] += disp[i] * d; |
| 60 |
> |
d = 1.0 / mf->fxp->sca; |
| 61 |
> |
VSUM(r->pert, r->pert, disp, d); |
| 62 |
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return(0); |
| 63 |
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} |
