VS:GetClosestPt

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Description

Returns the index number of the object closest to the specified location.

The index value will return 0 if no vertex can be determined as closest, and will return -1 if the object does not support GetClosestPt.

For container objects, GetClosestPt has distinct behaviors. For walls, if the closest vertex is is in a subobject, obj will be set to a handle to the subobject. For symbols and plug-in objects, an index to the sub-object will be returned via parameter containedObj.

GetClosestPt supports only 2D objects.

PROCEDURE GetClosestPt(
            VAR obj            :HANDLE;
            ptX,ptY            :REAL;
            VAR index          :INTEGER;
            VAR containedObj   :LONGINT);

def vs.GetClosestPt(obj, pt):
    return (obj, index, containedObj)

Parameters

obj	HANDLE	Handle to object.
pt	REAL	Coordinate location of comparison point.
index	INTEGER	Index to vertex.
containedObj	LONGINT	Index of sub-object.

Example

VectorScript

PROCEDURE GetClosestPtExample;
VAR
obj :HANDLE; 
ptX, ptY :REAL; 
index :INTEGER; 
containedObj :LONGINT;
BEGIN
GetPt(ptX, ptY);
obj := PickObject(ptX, ptY);
GetClosestPt(obj, ptX, ptY, index, containedObj);
SetPenFore(obj, 65535, 0, 0);
END;
RUN(GetClosestPtExample);

Python

def PickPointCallback(pt):
	obj = vs.PickObject(pt[0], pt[1])	
	red = 65535
	green = 0
	blue = 0
	color = vs.RGBToColorIndex(red, green, blue)
	obj, index, containedObj = vs.GetClosestPt(obj, pt[0], pt[1])
	vs.SetPenFore(obj, color )

def GetClosestPtExample():
	vs.GetPt(PickPointCallback)	

GetClosestPtExample()

Version

Availability: from VectorWorks8.5