diff options
Diffstat (limited to 'transform.h')
| -rw-r--r-- | transform.h | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/transform.h b/transform.h new file mode 100644 index 00000000..fe0a0f23 --- /dev/null +++ b/transform.h @@ -0,0 +1,37 @@ +#ifndef TRANSFORM_H +#define TRANSFORM_H + +#include "point.h" + +struct transformation { + int width; /* Height of destination rectangle */ + int height; /* Width of destination rectangle */ + long scale; /* Scale factor */ + int angle; /* Rotation angle */ + double cos_val,sin_val; /* cos and sin of rotation angle */ + struct coord rect[2]; /* Source rectangle */ + struct coord center; /* Center of source rectangle */ +}; + +int transform(struct transformation *t, struct coord *c, struct point *p); +int is_visible(struct transformation *t, struct coord *c); +int is_too_small(struct transformation *t, struct coord *c, int limit); +void transform_lng_lat(struct coord *c, struct coord_geo *g); +void transform_reverse(struct transformation *t, struct point *p, struct coord *c); +void transform_print_deg(double deg); +double transform_scale(int y); +double transform_distance(struct coord *c1, struct coord *c2); +int transform_distance_sq(struct coord *c1, struct coord *c2); +int transform_distance_line_sq(struct coord *l0, struct coord *l1, struct coord *ref, struct coord *lpnt); + +void transform_mercator(double *lng, double *lat, struct coord *c); +int is_point_visible(struct transformation *t, struct coord *c); +int transform_get_scale(struct transformation *t); +void transform_setup_source_rect(struct transformation *t); +void transform_set_angle(struct transformation *t,int angle); +void transform_setup(struct transformation *t, int x, int y, int scale, int angle); +void transform_setup_source_rect_limit(struct transformation *t, struct coord *center, int limit); +void transform_geo_text(struct coord_geo *g, char *buffer); + + +#endif |