148 lines
3.5 KiB
Julia
148 lines
3.5 KiB
Julia
using GLMakie, Observables
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using .AnimalFurFHN
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# Parameters and initial conditions
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N = 128
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dx = 1.0
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Du, Dv = Observable(0.16), Observable(0.08)
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F, k = Observable(0.060), Observable(0.062)
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dt = 1.0
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params_obs = Observable(AnimalFurFHN.GSParams(N, dx, 0.16, 0.08, 0.08, 0.06))
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function update_params!(params_obs, u, v, feed, kill)
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old = params_obs[]
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params_obs[] = AnimalFurFHN.GSParams(old.N, old.dx, u, v, feed, kill)
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end
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lift(Du, Dv, F, k) do u, v, F, k
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update_params!(params_obs, u, v, F, k)
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end
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U = ones(N, N)
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V = zeros(N, N)
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center = N ÷ 2
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radius = 10
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U[center-radius:center+radius, center-radius:center+radius] .= 0.50
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V[center-radius:center+radius, center-radius:center+radius] .= 0.25
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# Observable holding current U for heatmap
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heat_obs = Observable(U)
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function laplacian5(f)
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h2 = dx^2
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left = f[2:end-1, 1:end-2]
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right = f[2:end-1, 3:end]
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down = f[3:end, 2:end-1]
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up = f[1:end-2, 2:end-1]
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center = f[2:end-1, 2:end-1]
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return (left .+ right .+ down .+ up .- 4 .* center) ./ h2
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end
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function step!(U, V)
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lap_u = laplacian5(U)
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lap_v = laplacian5(V)
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u = U[2:end-1, 2:end-1]
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v = V[2:end-1, 2:end-1]
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uvv = u .* v .* v
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u_new = u .+ (Du[] .* lap_u .- uvv .+ F[] .* (1 .- u)) .* dt
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v_new = v .+ (Dv[] .* lap_v .+ uvv .- (F[] .+ k[]) .* v) .* dt
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# Update with new values
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U[2:end-1, 2:end-1] .= u_new
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V[2:end-1, 2:end-1] .= v_new
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# Periodic boundary conditions
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U[1, :] .= U[end-1, :]
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U[end, :] .= U[2, :]
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U[:, 1] .= U[:, end-1]
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U[:, end] .= U[:, 2]
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V[1, :] .= V[end-1, :]
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V[end, :] .= V[2, :]
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V[:, 1] .= V[:, end-1]
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V[:, end] .= V[:, 2]
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# Update heatmap observable
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heat_obs[] = copy(U)
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end
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function multi_step!(state, n_steps)
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for _ in 1:n_steps
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step!(state[1], state[2])
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end
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end
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# Build GUI
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fig = Figure(size=(600, 600))
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ax = Axis(fig[1, 1])
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hm = Makie.heatmap!(ax, heat_obs, colormap=:magma)
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ax.aspect = DataAspect()
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# # Controls
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fig[2, 1] = buttongrid = GridLayout(tellwidth=false)
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btn_step = Button(buttongrid[1, 1], label="Step")
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btn_start = Button(buttongrid[1, 2], label="Start")
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btn_stop = Button(buttongrid[1, 3], label="Stop")
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btn_reset = Button(buttongrid[1, 4], label="Reset")
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fig[3, 1] = textboxgrid = GridLayout(tellwidth=false)
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box_u = Textbox(textboxgrid[1, 1], validator=Float64, placeholder="word")
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# box_v = Textbox(textboxgrid[1, 2], validator=Float64, placeholder="word")
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# box_feed = Textbox(textboxgrid[1, 3], validator=Float64, placeholder="word")
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# box_kill = Textbox(textboxgrid[1, 4], validator=Float64, placeholder="word")
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# Timer and state for animation
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running = Observable(false)
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function reset!(U, V, heat_obs)
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U .= 1.0
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V .= 0.0
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center = size(U, 1) ÷ 2
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radius = 10
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U[center-radius:center+radius, center-radius:center+radius] .= 0.50
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V[center-radius:center+radius, center-radius:center+radius] .= 0.25
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heat_obs[] = copy(U)
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end
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function animation_loop()
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while running[]
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# step!(U, V)
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multi_step!((U, V), 30)
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sleep(0.05) # ~20 FPS
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end
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end
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on(box_u.stored_string) do s
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try
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Du[] = parse(Float64, s)
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println("Change Du ", Du[])
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catch
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@warn "Invalid input for Du: $s"
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end
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end
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on(btn_step.clicks) do _
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multi_step!((U, V), 30)
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end
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on(btn_start.clicks) do _
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if !running[]
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running[] = true
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@async animation_loop()
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end
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end
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on(btn_stop.clicks) do _
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running[] = false
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end
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on(btn_reset.clicks) do _
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running[] = false
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reset!(U, V, heat_obs)
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end
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display(fig)
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