Rectangular adjacency matrix

A simple example of a rectangular adjacency matrix. The scaleBand.padding() method is not used because it is less flexible than using pixel math. This way, we can use pixel-based paddings and still be able to use the scale to address a specific cell without having to correct pixel values by taking the unknown padding amount into account.

forked from nitaku's block: Rectangular adjacency matrix

forked from anonymous's block: Rectangular adjacency matrix