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api:dk11:net:tatukgis.ndk.wpf.tgis_viewerwnd.locate_tgis_point_double_boolean

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TGIS_ViewerWnd.Locate(TGIS_Point, double, bool) method

DK11 for .NET | TatukGIS.NDK.WPF.TGIS_ViewerWnd.Locate | Overloads | Constructors | Methods | Properties | Events

Locate a shape that is near _ptg, but is closer than _prec distance.

Available also on: Delphi FMX | Delphi VCL | .NET WinForms | Java.

Syntax

// C#
public TGIS_ShapeAbstract Locate(
  TGIS_Point _ptg,
  double _prec,
  bool _visible
);
' VisualBasic
Public Function Locate(
  ByVal _ptg As TGIS_Point,
  ByVal _prec As Double,
  ByVal _visible As Boolean
) As TGIS_ShapeAbstract
// Oxygene
public
  function Locate(
    _ptg : TGIS_Point;
    _prec : Double;
    _visible : Boolean
  ) : TGIS_ShapeAbstract;

Parameters

Name Type Description
_ptg TGIS_Point reference point /searching point/
_prec double
Double
precision /not a longer distance than/; for points inside the polygon (if _prec >= 0) the distance will be multiply by 0.95 (to prefer points inside the polygon) but will not be bigger then _prec; for point distance will be multiplied by 0.9 to prefer points over lines and polygons; precision is express in map units
_visible bool
Boolean
if true the only visible shapes will be evaluated; shapes turned of by query of hidden will be ignored

Result

Type Description
TGIS_ShapeAbstract Located shape or nil

Remarks

To improve performance sections visibility can be used to choose layer to call its Locate method. Only visible shapes will be evaluated.

2017/10/20 18:21