def color_at(world, ray, remaining=LIMIT):
xs = intersect_world(world, ray)
if len(xs) == 0:
return color(0, 0, 0)
else:
for i in xs:
if i.t > 0:
comps = prepare_computations(i, ray, xs)
return shade_hit(world, comps, remaining)
return color(0, 0, 0)
def step_impl(context):
context.comps = prepare_computations(context.i, context.r)
def step_impl(context):
context.comps = prepare_computations(context.xs[5], context.r, context.xs)