point2.h File Reference

two-dimensional point More...

#include "a.h"
#include "vector2.h"

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Data Structures
struct	a_point2
	instance structure for two-dimensional point More...

Macros
#define	A_POINT2_C(x, y)
#define	a_point2_c(x)
#define	a_point2_(_, x)

Typedefs
typedef struct a_point2	a_point2
typedef struct a_point2	a::point2

Functions
void	a_vector2_set (a_vector2 *ctx, a_point2 const *p, a_point2 const *q)
	set a 2D vector as the difference from point p to point q.
void	a_point2_val (a_point2 const *ctx, a_real *x, a_real *y)
	get the cartesian coordinates of a 2D point.
void	a_point2_set_val (a_point2 *ctx, a_real x, a_real y)
	set the cartesian coordinates of a 2D point.
void	a_point2_pol (a_point2 const *ctx, a_real *rho, a_real *theta)
	get the polar coordinates of a 2D point.
void	a_point2_set_pol (a_point2 *ctx, a_real rho, a_real theta)
	set the polar coordinates of a 2D point.
void	a_point2_add (a_point2 const *lhs, a_vector2 const *rhs, a_point2 *res)
	add a 2D vector to a 2D point.
void	a_point2_sub (a_point2 const *lhs, a_vector2 const *rhs, a_point2 *res)
	subtract a 2D vector from a 2D point.
void	a_point2_mul (a_point2 const *lhs, a_real rhs, a_point2 *res)
	multiplie a 2D point by a scalar.
void	a_point2_div (a_point2 const *lhs, a_real rhs, a_point2 *res)
	divide a 2D point by a scalar.
void	a_point2_pos (a_point2 const *ctx, a_vector2 *res)
	convert it into a vector from the origin to the point.
void	a_point2_neg (a_point2 const *ctx, a_vector2 *res)
	convert it into a vector from the point to the origin.
a_real	a_point2_dist (a_point2 const *lhs, a_point2 const *rhs)
	compute the distance between two 2D points.
a_real	a_point2_dist2 (a_point2 const *lhs, a_point2 const *rhs)
	compute the squared distance between two 2D points.
a_real	a_point2_mindist (a_point2 const *ctx, a_point2 const *i_p, a_size i_n, a_point2 *o_p, a_size *o_i)
	compute the minimum distance from a reference point to a point set.
a_real	a_point2_maxdist (a_point2 const *ctx, a_point2 const *i_p, a_size i_n, a_point2 *o_p, a_size *o_i)
	compute the maximum distance from a reference point to a point set.
int	a_point2_cmpx (a_point2 const *lhs, a_point2 const *rhs)
	compare two 2D points primarily by X-coordinate, then by Y-coordinate.
int	a_point2_cmpy (a_point2 const *lhs, a_point2 const *rhs)
	compare two 2D points primarily by Y-coordinate, then by X-coordinate.

Detailed Description

two-dimensional point