The "circle arcs" system for maintaining parallel road edges is very similar to how the stroke extrusion algorithm in our drawing library[1] works to maintain s

The "circle arcs" system for maintaining parallel road edges is very similar to how the stroke extrusion algorithm in our drawing library[1] works to maintain stroke width, with one difference being that we vary the circle radius for some brush dynamics based on pressure or speed. [1]: https://github.com/google/ink https://github.com/google/ink