api:dk11:net:tatukgis.ndk.tgis_layervector.locateex_tgis_point_double_tgis_uid_double_integer_tgis_point

DK11 for .NET
| TatukGIS.NDK.TGIS_LayerVector.**LocateEx**
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Locates a shape (more precise).

// C# public TGIS_Shape LocateEx( TGIS_Point _ptg, double _prec, long _uid, ref double _dist, ref int _part, ref TGIS_Point _proj );

' VisualBasic Public Function LocateEx( ByVal _ptg As TGIS_Point, ByVal _prec As Double, ByVal _uid As Long, ByRef _dist As Double, ByRef _part As Integer, ByRef _proj As TGIS_Point ) As TGIS_Shape

// Oxygene public function LocateEx( _ptg : TGIS_Point; _prec : Double; _uid : TGIS_Uid; var _dist : Double; var _part : Integer; var _proj : TGIS_Point ) : TGIS_Shape; virtual;

Name | Type | Description |
---|---|---|

_ptg | TGIS_Point | reference point /searching point/ if the layer has been attached to the Viewer then expected _ptg units are in a Viewer coordinate space; otherwise expected _ptg units are in a Layer coordinate space |

_prec | double Double | precision /not a longer distance than/; point inside a polygon is always not greater than _dist; if _prec is less then 0, then being outside/inside polygon means the same _prec units are calculated same way as _ptg |

_uid | long TGIS_Uid | Uid of reference shape or -1; thanks to this, is possible to find nearest shape, excluding shape given by _uid. |

_dist | double Double | reached distance between _pt and shape in Result; 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 _dist units are calculated same way as _ptg |

_part | int Integer | number of the part closest to a given point |

_proj | TGIS_Point | point projected to the nearest element of a shape |

Type | Description |
---|---|

TGIS_Shape | Found shape or nil. |

Use this method to locate a shape that is near _ptg but also on _prec distance. It finds a shape using FindFirst method in extent corrected by _prec and _ptg params.

See Locate for example.

If no shape is found on a layer, the searcher takes into account labels registered by the allocator (by extent). In order to disable this behavior, _visible must be set to False.

2020/05/07 01:18