| 41 |
|
#define tsin sin |
| 42 |
|
#define ttan tan |
| 43 |
|
#else |
| 44 |
< |
/* table-based cosine approximation */ |
| 44 |
> |
/* table-based approx in tcos.c */ |
| 45 |
|
#define tsin(x) tcos((x)-(PI/2.)) |
| 46 |
|
#define ttan(x) (tsin(x)/tcos(x)) |
| 47 |
|
#endif |
| 48 |
– |
|
| 49 |
– |
/* VC 2015 has those defined (XXX possibly earlier?) */ |
| 50 |
– |
#if ((defined(_WIN32) || defined(_WIN64)) \ |
| 51 |
– |
&& (!defined(_MS_VER) || _MS_VER < 1900)) |
| 52 |
– |
extern double erf(double x); |
| 53 |
– |
extern double erfc(double x); |
| 54 |
– |
#endif |
| 48 |
|
/* defined in xf.c */ |
| 49 |
|
extern int xf(XF *ret, int ac, char *av[]); |
| 50 |
|
extern int invxf(XF *ret, int ac, char *av[]); |
| 56 |
|
extern void decodedir(FVECT dv, int32 dc); |
| 57 |
|
extern double dir2diff(int32 dc1, int32 dc2); |
| 58 |
|
extern double fdir2diff(int32 dc1, FVECT v2); |
| 59 |
+ |
/* defined in disk2square.c */ |
| 60 |
+ |
extern void SDsquare2disk(double ds[2], double seedx, double seedy); |
| 61 |
+ |
extern void SDdisk2square(double sq[2], double diskx, double disky); |
| 62 |
|
|
| 63 |
|
#ifdef __cplusplus |
| 64 |
|
} |
