At this point, I'm sure you're already familiar with the basic "hex grid" data structure: The q-axis is 0deg→︎; the r-axis is 120deg↙︎. ┌───┐ ┌───┐ ┌───┐ ┌───┐ ┌───┐ ┌─┘ └─┬─┘ └─┬─┘ └─┬─┘ └─┬─┘ └─┬─ │ (0,0) │ (1,0) │ (2,0) │ (3,0) │ (4,0) │ ┌─┴─┐ ┌─┴─┐ ┌─┴─┐ ┌─┴─┐ ┌─┴─┐ ┌─┴─ ┌─┘ └─┬─┘ └─┬─┘ └─┬─┘ └─┬─┘ └─┬─┘ │ (0,1) │ (1,1) │ (2,1) │ (3,1) │ (4,1) │ ┌─┴─┐ …