Drawing Antialiased Lines with OpenGL

By Konstantin Käfer Maps are mostly made up of lines, as well as the occasional polygon thrown in. Unfortunately, drawing lines is a weak point of OpenGL. The GL_LINES drawing mode is limited: it does not support line joins, line caps, non-integer line widths, widths greater than 10px, or varying widths in a single pass. Given these limitations, it’s unsuitable for the line work necessary for high