CPolygon:DeletePt

The DeletePt function deletes a point from the CPolygon and closes the hole with the point indices above it. If the index is outside the range [1, CPolygon:Count()], the method fails.

Syntax

bSuccess = CPolygon:DeletePt( nIndex )

where

nIndex is the index where to delete the point.

bSuccess is the returned success code. On success it is true, otherwise false.

Example

The following script creates a CPolygon object and then deletes the point at index 5.

x {-1,0,1,2,3,4} ; y = {4,5,6,7,8,9}
A = NewPolygon( x, y )	-- create a CPolygon with 6 points
Printf("[5] = %lg,%lg", A:GetPt(5) )	-- result: [5] = 3,8
Printf("Count = %d", A:Count() )	-- result: Count = 6

bSuccess = A:DeletePt( 5 )	-- delete at index [5]
if bSuccess then
Printf("[5] = %lg,%lg", A:GetPt(5) )	-- result: [5] = 4,9
Printf("Count = %d", A:Count() )	-- result: Count = 5
else Printf("Point not deleted") end