Map of lines in an orthographic drawing.
Arrays of lines at odd indices represent vertical lines.
Arrays of lines at even indices represent horizontal lines.
Those arrays specify the lines from top to bottom.
So, a 2x2 grid will have inner arrays of sizes [2, 3, 2, 3, 2].
Map of lines in an orthographic drawing. Arrays of lines at odd indices represent vertical lines. Arrays of lines at even indices represent horizontal lines. Those arrays specify the lines from top to bottom. So, a 2x2 grid will have inner arrays of sizes [2, 3, 2, 3, 2].