| 40 |
|
register XF_SPEC *spec; |
| 41 |
|
register int n; |
| 42 |
|
int rv; |
| 43 |
– |
XF thisxf; |
| 43 |
|
|
| 44 |
|
if (ac == 1) { /* something with existing transform */ |
| 45 |
|
if ((spec = xf_context) == NULL) |
| 77 |
|
xf_context = spec; |
| 78 |
|
} |
| 79 |
|
/* translate new specification */ |
| 80 |
< |
if (xf(&thisxf, spec->xac, &xf_argv[spec->xav0]) != spec->xac) |
| 80 |
> |
if (xf(&spec->xf, spec->xac, &xf_argv[spec->xav0]) != spec->xac) |
| 81 |
|
return(MG_ETYPE); |
| 82 |
+ |
/* check for vertex reversal */ |
| 83 |
+ |
if ((spec->rev = (spec->xf.sca < 0.))) |
| 84 |
+ |
spec->xf.sca = -spec->xf.sca; |
| 85 |
|
/* compute total transformation */ |
| 86 |
|
if (spec->prev != NULL) { |
| 87 |
< |
multmat4(spec->xf.xfm, spec->prev->xf.xfm, thisxf.xfm); |
| 88 |
< |
spec->xf.sca = spec->prev->xf.sca * thisxf.sca; |
| 89 |
< |
} else |
| 90 |
< |
spec->xf = thisxf; |
| 87 |
> |
multmat4(spec->xf.xfm, spec->xf.xfm, spec->prev->xf.xfm); |
| 88 |
> |
spec->xf.sca *= spec->prev->xf.sca; |
| 89 |
> |
spec->rev ^= spec->prev->rev; |
| 90 |
> |
} |
| 91 |
|
spec->xid = comp_xfid(spec->xf.xfm); /* compute unique ID */ |
| 92 |
|
return(MG_OK); |
| 93 |
|
} |
