/// <summary>
/// Extends a straight line at both ends
/// </summary>
/// <param name="line"></param>
/// <param name="distance"></param>
/// <search></search>
public static Autodesk.DesignScript.Geometry.Line ExtendAtBothEnds(this Autodesk.DesignScript.Geometry.Curve line, double distance)
{
Autodesk.DesignScript.Geometry.Point stPt = line.StartPoint;
Autodesk.DesignScript.Geometry.Point endPt = line.EndPoint;
Autodesk.DesignScript.Geometry.Vector vec1 = Autodesk.DesignScript.Geometry.Vector.ByTwoPoints(endPt, stPt);
Autodesk.DesignScript.Geometry.Vector vec2 = Autodesk.DesignScript.Geometry.Vector.ByTwoPoints(stPt, endPt);
Autodesk.DesignScript.Geometry.Point newStPt = stPt.Translate(vec1, distance) as Autodesk.DesignScript.Geometry.Point;
Autodesk.DesignScript.Geometry.Point newEndPt = endPt.Translate(vec2, distance) as Autodesk.DesignScript.Geometry.Point;
Autodesk.DesignScript.Geometry.Line newLine = Autodesk.DesignScript.Geometry.Line.ByStartPointEndPoint(newStPt, newEndPt);
//Dispose redundant geometry
stPt.Dispose();
endPt.Dispose();
vec1.Dispose();
vec2.Dispose();
newStPt.Dispose();
newEndPt.Dispose();
return(newLine);
}