| 14 |
|
#ifdef __cplusplus |
| 15 |
|
extern "C" { |
| 16 |
|
#endif |
| 17 |
– |
|
| 17 |
|
/* regular transformation */ |
| 18 |
|
typedef struct { |
| 19 |
|
MAT4 xfm; /* transform matrix */ |
| 45 |
|
#define tsin(x) tcos((x)-(PI/2.)) |
| 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[]); |