TGIS_Shape.Distance method

Calculate planar distance between a point and the shape.

Available also on: .NET | Java | ActiveX | Python.

Syntax

// Delphi
public
  function Distance(
    const _ptg : TGIS_Point;
    const _prec : Double
  ) : Double; virtual;

// C++ Builder
public:
  virtual double Distance(
    TGIS_Point* const _ptg,
    const double _prec
  );

Name	Type	Description
_ptg	TGIS_Point	reference point
_prec	Double	precision /not longer distance than/; point inside the polygon is always not greater then _prec; if _prec less than 0, then being outside/inside polygon means the same;

Type	Description
Double	Distance between shapes in map units.

var
  _shape : TGIS_Shape;
  x : Double;
  pkt : TGIS_Point;
 
  pkt.X:=10;
  pkt.Y:=10;
 
  // calculate a distance
  x:=_shape.Distance(pkt,20);