pcGrowPoints

pcGrowPoints(
l_pointList
xf_margin
) 
=> l_incrementedPointList / nil

Description

Increase or decrease the size of a manhattan polygon by the specified margin. The system adds xf_margin to each coordinate in the list and returns a list of the coordinates of the resulting polygon.

Arguments

l_pointList	List of coordinates defining the original manhattan polygon, in either of the following formats: '( ( x1 y1 ) ( x2 y2 ) ... ( xn yn ) ) ( x1:y1  x2:y2 ... xn:xy )
xf_margin	Positive or negative integer or floating-point number used to increment or decrement the points of the original manhattan polygon. Valid Values: integer or floating-point number

Value Returned

l_incrementedPointList
	List of coordinates defining the incremented manhattan polygon, in either of the following formats: '( ( x1 y1 ) ( x2 y2 ) ... ( xn yn ) ) ( x1:y1  x2:y2 ... xn:xy )
nil	The function did not complete successfully.

Examples

origPoints = '( 4.0:1.0 5.0:1.0 5.0:2.5 6.5:2.5 6.5:-0.5 4.0:-0.5 )

pcGrowPoints( origPoints 10 ) 
    =>((-6.0 11.0) 
        (-5.0 11.0) 
        (-5.0 12.5) 
        (16.5 12.5) 
        (16.5 -10.5) 
        (-6.0 -10.5) 
    )

Increments each point of the original manhattan polygon by 10 and returns a list of the points of the incremented polygon.

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