nothing in newtracewalk

[zenna]

maybedown in newtracewalk.jl can return nothing instead of pair of arrow and port

function test_raytrace_inv(batch_size=2, width=5, height=5)
  rtarr = rayintersect_arr(batch_size, width, height)
  invert(rtarr)
end

test_raytrace_inv()