In your case the plane rotates about Y axis. Hence importing Rotations.jl and rotating the normal about yaxis, you can define a new plane from the origin and the new normal. If you want to rotate progresively from the normal n₀=Vec(0.0,0.0,1.0) to the normal nₜ =Vec(1.0, 0.0, 0.0), t=π/2, then this code should work (I have not installed Meshes.jl):
using Meshes, Rotations
O = Point(0.0, 0.0, 0.0)
n₀ = Vec(0.0, 0.0, 1.0)
θ=range(0, π/2, 10)
for t ∈ θ
pₜ=Plane(O, RotY(t)*n₀)
"do something with the new plane"
end
It would be nice to add a method to rotate Plane specifically that simply returns another plane object as an optimization. Would you like to submit a PR?