api:dk11:java:tatukgis.jdk.tgis_layervector.locateex_tgis_point_double_tgis_uid_double_integer_tgis_point_boolean
Table of Contents
TGIS_LayerVector.LocateEx(TGIS_Point, double, long, double, int, TGIS_Point, bool) method
DK11 for Java | tatukgis.jdk.TGIS_LayerVector.LocateEx | Overloads | Constructors | Fields | Methods | Properties | Events
Locates a shape (more precise).
Syntax
// Java public TGIS_Shape LocateEx( TGIS_Point _ptg, double _prec, long _uid, /* ref */ @ValueTypeParameter VarParameter<double> _dist, /* ref */ @ValueTypeParameter VarParameter<int> _part, /* ref */ @ValueTypeParameter VarParameter<TGIS_Point> _proj, bool _visible );
// Oxygene public function LocateEx( _ptg : TGIS_Point; _prec : Double; _uid : TGIS_Uid; var _dist : Double; var _part : Integer; var _proj : TGIS_Point; _visible : Boolean ) : TGIS_Shape; virtual;
Parameters
| Name | Type | Description |
|---|---|---|
| _ptg | TGIS_Point | reference point /searching point/ in a layer; 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 |
| _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_Shape | Found shape or nil. |
Remarks
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.
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.
2022/11/16 01:49