| 40 |
|
register OBJREC *m; |
| 41 |
|
register RAY *r; |
| 42 |
|
{ |
| 43 |
– |
#define mxf ((XFORM *)m->os) |
| 43 |
|
extern double varvalue(); |
| 44 |
|
extern int errno; |
| 45 |
|
FVECT disp; |
| 46 |
+ |
double d; |
| 47 |
+ |
register XFORM *mxf; |
| 48 |
|
register int i; |
| 49 |
|
register char **sa; |
| 50 |
|
|
| 52 |
|
objerror(m, USER, "bad # arguments"); |
| 53 |
|
sa = m->oargs.sarg; |
| 54 |
|
|
| 55 |
< |
if (mxf == NULL) { |
| 55 |
> |
if ((mxf = (XFORM *)m->os) == NULL) { |
| 56 |
|
mxf = (XFORM *)malloc(sizeof(XFORM)); |
| 57 |
|
if (mxf == NULL) |
| 58 |
|
goto memerr; |
| 58 |
– |
mxf->fore.sca = 1.0; |
| 59 |
– |
setident4(mxf->fore.xfm); |
| 59 |
|
if (xf(mxf->fore.xfm, &mxf->fore.sca, |
| 60 |
|
m->oargs.nsargs-4, sa+4) != m->oargs.nsargs-4) |
| 61 |
|
objerror(m, USER, "bad transform"); |
| 62 |
|
if (mxf->fore.sca < 0.0) |
| 63 |
|
mxf->fore.sca = -mxf->fore.sca; |
| 65 |
– |
mxf->back.sca = 1.0; |
| 66 |
– |
setident4(mxf->back.xfm); |
| 64 |
|
invxf(mxf->back.xfm, &mxf->back.sca, |
| 65 |
|
m->oargs.nsargs-4, sa+4); |
| 66 |
|
if (mxf->back.sca < 0.0) |
| 67 |
|
mxf->back.sca = -mxf->back.sca; |
| 68 |
+ |
m->os = (char *)mxf; |
| 69 |
|
} |
| 70 |
|
|
| 71 |
< |
setmap(m, r, mxf->back.sca, mxf->back.xfm); |
| 71 |
> |
setmap(m, r, mxf->back.xfm, mxf->back.sca); |
| 72 |
|
|
| 73 |
|
if (!vardefined(sa[0])) |
| 74 |
|
loadfunc(sa[3]); |
| 79 |
|
objerror(m, WARNING, "compute error"); |
| 80 |
|
return; |
| 81 |
|
} |
| 82 |
< |
if (mxf->fore.xfm == NULL) |
| 83 |
< |
for (i = 0; i < 3; i++) |
| 84 |
< |
r->pert[i] += disp[i]; |
| 85 |
< |
else |
| 86 |
< |
for (i = 0; i < 3; i++) |
| 89 |
< |
r->pert[i] += ( disp[0]*mxf->fore.xfm[0][i] + |
| 90 |
< |
disp[1]*mxf->fore.xfm[1][i] + |
| 91 |
< |
disp[2]*mxf->fore.xfm[2][i] ) |
| 92 |
< |
/ mxf->fore.sca; |
| 82 |
> |
multv3(disp, disp, mxf->fore.xfm); |
| 83 |
> |
multv3(disp, disp, r->rofx); |
| 84 |
> |
d = 1.0 / (mxf->fore.sca * r->rofs); |
| 85 |
> |
for (i = 0; i < 3; i++) |
| 86 |
> |
r->pert[i] += disp[i] * d; |
| 87 |
|
return; |
| 88 |
|
memerr: |
| 89 |
|
error(SYSTEM, "out of memory in t_func"); |
| 96 |
– |
#undef mxf |
| 90 |
|
} |
