| 14 |
|
#ifdef __cplusplus |
| 15 |
|
extern "C" { |
| 16 |
|
#endif |
| 17 |
– |
|
| 17 |
|
/* regular transformation */ |
| 18 |
|
typedef struct { |
| 19 |
|
MAT4 xfm; /* transform matrix */ |
| 32 |
|
#define PI 3.14159265358979323846 |
| 33 |
|
#endif |
| 34 |
|
#endif |
| 35 |
+ |
/* defined in tcos.c */ |
| 36 |
+ |
extern double tcos(double x); |
| 37 |
+ |
extern double atan2a(double y, double x); |
| 38 |
|
|
| 39 |
< |
#ifdef FASTMATH |
| 39 |
> |
#ifdef __FAST_MATH__ |
| 40 |
|
#define tcos cos |
| 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 |
| 46 |
– |
/* defined in tcos.c */ |
| 47 |
– |
extern double tcos(double x); |
| 48 |
– |
extern double aatan2(double y, double x); |
| 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 |
|
} |
