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/*****************************************************************************/
/* tpoint.h */
/*****************************************************************************/
/* point.h : operation on 2D points and arrays (domsa@konkoly.hu (2002)) */
/* point.h,v 5.5 2003/05/13 16:09:43 domsa Exp */
#ifndef __TPOINT_H_INCLUDED
#define __TPOINT_H_INCLUDED 1
typedef struct
{ int id;
double xcoord,ycoord;
} tpoint;
typedef struct
{ int length;
tpoint *points;
} tpointarr;
tpointarr *tpoint_createarr(void);
tpointarr *tpoint_buildarr(int length,tpoint *points);
void tpoint_destroyarr(tpointarr *pa);
double tpoint_eucdist(tpoint *p1,tpoint *p2);
double tpoint_eucdist2(tpoint *p1,tpoint *p2);
double tpoint_minx(int nelem,tpoint *points);
double tpoint_miny(int nelem,tpoint *points);
double tpoint_maxx(int nelem,tpoint *points);
double tpoint_maxy(int nelem,tpoint *points);
void tpoint_minmaxx(int nelem,tpoint *points,double *minx,double *maxx);
void tpoint_minmaxy(int nelem,tpoint *points,double *miny,double *maxy);
double tpoint_lengthx(int nelem,tpoint *points);
double tpoint_lengthy(int nelem,tpoint *points);
void tpoint_flipx(int nelem,tpoint *points);
void tpoint_flipy(int nelem,tpoint *points);
void tpoint_magx(int nelem,tpoint *points,double xmag);
void tpoint_magy(int nelem,tpoint *points,double ymag);
void tpoint_zoom(int nelem,tpoint *points,double zoom);
void tpoint_shiftx(int nelem,tpoint *points,double xshift);
void tpoint_shifty(int nelem,tpoint *points,double yshift);
void tpoint_rotate(int nelem,tpoint *points,double rotang);
void tpoint_rrotate(int nelem,tpoint *points,double rotangdeg);
int tpoint_sortx(const void *, const void *);
int tpoint_sorty(const void *, const void *);
int tpoint_sortid(const void *, const void *);
tpoint * tpoint_copy(int nelem,tpoint *points);
void tpoint_remove(int idx, int nelem,tpoint *points);
/*****************************************************************************/
#endif
/*****************************************************************************/
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