difference

    Create regions where subject polygons are filled except where clip polygons are filled.

    Geometry2D.swift:25
    case difference

    Other cases

    • case union

      Create regions where either subject or clip polygons (or both) are filled.

    • case intersection

      Create regions where both subject and clip polygons are filled.

    • case xor

      Create regions where either subject or clip polygons are filled but not where both are filled.