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#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
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