Slope coordinates visualized

[toyboot4e]

It took me a while (years) to understand it so please let me share it. The picture below visualizes the coordinates in use to calculate slopes:

• The position of the origin is interesting. It's not on the hero!
• Note that the numbers are in row or column and not in x or y.

It is not so much an "issue" but I hope you don't feel bad. Thanks!