- can we merge adjacent polylines at intersections based on closest angle, and then use the existing stuff to get nice geometry?
- i think we still have to trim back correctly
- first figure out all the trimming cases for the T, outside and inside lanes, etc
- before trimming back lines, project out the correct width. sort all those points by angle from the center. thats the intersection polygon? then somehow trim back lines to hit that nicely.
- do the current trim_lines thing, but with lines, not segments? no, there'd be many almost-parallel lines.
- at a T intersection, some lines aren't trimmed back at all
- start with entire roads and the giant thick polygons
- just find the intersection of all those big polygons
- almost like a loop:
- trim back yellow center lines, compute giant road band, see if there's intersection
- then figure out the lane geometry WITHIN the constraint of the big road band
- probably doesnt have to be a fixed point loop. what if we just trim lines based on the outermost lines of all the roads? and then based on how much length we removed there, reduce the original yellow center lines. at some angles this is exactly the same. at others, it's probably different -- is there a specific relation we can figure out?
