Convert Observable Vector of Ranges into Vector of Observable Ranges

Specific Domains Visualization
1

I have an observable vector of ranges and I want a vector of observable ranges so I can call lines on them. How can I do that?

using WGLMakie, LinearAlgebra, Chain, Compat

c = Observable([5,6,7])
vertices = map(collect, Iterators.product(Iterators.repeated([-1,1],3)...))
edges =  @chain vertices begin
    Iterators.product(_, _)
    collect
    filter(Base.splat((v,w)->sort(abs.(v-w))==[0,0,2]), _)
    map(x->stack(x; dims=2), _)
end

screenposition((x,y,z)) = [x/z,y/z]
screenpoints = lift(c) do c
    map(v->screenposition(v-c), vertices)
end
screenedges = lift(c) do c
    map(edges) do e
        from, to = mapslices(screenposition, e .- c; dims=1)
        from:.01:to
    end
end