GEOtestPointOnLine

Test whether point on line lies.

With this routine it is checked whether the point on the line lies. The following results are possible for it: The point lies on the line. The point does not lie on the line. The point lies on a lengthening of the line.

Parametre

input_x (const stands in) [IN]

input_y (const stands in) [IN]

Co-ordinates of the point.

input_sx (const stands in) [IN]

input_sy (const stands in) [IN]

Starting point of the line.

input_ex (const stands in) [IN]

input_ey (const stands in) [IN]

Terminator point of the line.

Result

(int) [OUT]

0 if the point on the line lies.–1 if the point on a lengthening of the line lies.–2 if the point on the line does not lie and also not on the lengthening.

Declaration

#include "basic.h"

int DLLENTRY GEOtestPointOnLine (

const stands in input_x,

const stands in input_y,

const stands in input_sx,

const stands in input_sy,

const stands in input_ex,

const stands in input_ey

);

Related functions

GEOpointStraightOrientation