On 2020/04/19 21:43:26, hanwenn wrote: > (this still needs some work, but the speedup might be worth an early look)
* Buildings store Y coordinate of the left edge, rather than the intercept at x==0.0. This avoid excessive rounding problems when X is large, and lets us compute building.height_at(x[LEFT]) cheaply. Since intercept computation order depends on the execution of the merge algorithm and we use floating point arithmetic rather than fixed point, this would make results a lot less reproducible. I understand the sentiment and thought about it as well, but it would only work if the _original_ coordinates were retained even after intersection and additional intersections still worked based on the original coordinates, making the merge order (mostly) irrelevant with regard to error propagation. https://codereview.appspot.com/547980044/
