Option: What if we add a flag to the Line object describing if it has been covered and then only draw uncovered lines?
If an endpoint of a line is contained by a polygon, it is covered. This can just be another check when adding polygons, and the lines would still reside in i_lines for purposes of history.
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Option: What if we add a flag to the Line object describing if it has been covered and then only draw uncovered lines?
If an endpoint of a line is contained by a polygon, it is covered. This can just be another check when adding polygons, and the lines would still reside in i_lines for purposes of history.