def natural_left
bend-visgraph@2.0.0.0 · visgraph.bend:417
import bend-visgraph@2.0.0.0/visgraph.bend as Visgraph
import Base
417def natural_left(~x_at: Array<F32> -> U32 -> Array<F32> & F32, count: Nat, +j: U32, yr: Array<F32> & F32, xr: Array<F32> & F32, +dir: Direction, +k: Weight, +lo: F32, +hi: F32, +ia: U32, +xa: F32, +ya: F32, +scale_a: F32, +best: F32, es: Edges, +ahead: U32) -> Walked:
418 match count:
419 case 0n:
420 (ys, yb) = yr
421 (xs, xb) = xr
422 Walked{Array.get(F32, ys, ahead), Array.get(F32, xs, ahead), es}
423 case 1n+c:
424 (ys, +yb) = yr
425 (xs, +xb) = xr
426 +s = F32.div(F32.sub(yb, ya), F32.neg(F32.sub(xb, xa)))
427 +seen = clears(F32.is_gt(s, best), s, best, scale_a, xb, yb)
428 +j2 = (j - 1 : U32)
429 natural_left(~x_at, c, j2, Array.get(F32, ys, j2), x_at(xs, j2), dir, k, lo, hi, ia, xa, ya, scale_a, pick(seen, s, best), add_left(seen, dir, k, lo, hi, ia, j, xa, xb, ya, yb, F32.neg(s), es), ahead)