| # | Line 46 | Line 46 | extern double atan2a(double y, double x); | |
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| 46 | #define ttan(x) (tsin(x)/tcos(x)) | |
| 47 | #endif | |
| 48 | ||
| 49 | + | /* defined in disk2square.c */ |
| 50 | + | extern void SDsquare2disk(double ds[2], double seedx, double seedy); |
| 51 | + | extern void SDdisk2square(double sq[2], double diskx, double disky); |
| 52 | + | |
| 53 | /* defined in xf.c */ | |
| 54 | extern int xf(XF *ret, int ac, char *av[]); | |
| 55 | extern int invxf(XF *ret, int ac, char *av[]); | |
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