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PtInPoly.md

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PtInPoly

Description

Function PtInPoly returns TRUE if the point specified point lies within, or on, the referenced polygon or polyline object.

FUNCTION PtInPoly(
				pX,pY : REAL;
				h     : HANDLE): BOOLEAN;
def vs.PtInPoly(p, h):
    return BOOLEAN

Parameters

Name Type Description
p REAL X-Y coordinate point.
h HANDLE Handle to polygon.

Remarks

(_c_ 2021.12.27): This only works on polygons or segments of polylines whose vertex type is corner. Any point on poly segments with other vertex type (bezier, arc, radius, cubic) will return false. Also small polygon sides will cause failure. All in all it is barely usable for anything than large polygons (not polylines) with large sides.

Examples

VectorScript

PROCEDURE Example;
VAR
polyHandle :HANDLE;
locusHandle :HANDLE;
x, y :REAL;
BEGIN
CallTool(-204); polyHandle := FSActLayer;
CallTool(-221); locusHandle := FSActLayer;
GetLocPt(locusHandle, x, y);
Message(PtInPoly(x, y, polyHandle));
END;
RUN(Example);

Python



Version


Availability: from All Versions


Category