# | 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 | < | #ifdef _WIN32 |
50 | < | extern double erf(double x); |
51 | < | extern double erfc(double x); |
52 | < | #endif |
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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