Simulation doesn't read values from input slider on start

[dokato]

Describe the bug

When I manipulate the value of the slider during the simulation everything is fine, but when I set the value and then press the play button afterwards, it doesn't react to the input.

To reproduce

1. Take this model:

model = nengo.Network()
with model:
    a = nengo.Ensemble(n_neurons=10, dimensions = 1,
                       neuron_type=nengo.LIF())
    stim = nengo.Node(0)
    nengo.Connection(stim, a)

2. Add the slider to the stim. Set stim to 1.

3. Add graph showing the value of a.

4. Run simulation.

Expected behavior

It should show value 1 on the a graph, it shows 0 instead.

Screenshots

Versions

• OS: MacOS El Captain
• Browser: chrome
• Nengo GUI: 0.4.3

[astoeckel]

Interesting! The current behaviour is that the value is reset at the begin of the simulation to whatever the initial value of the Node is. In this case you explicitly specified "0" as initial value.

I honestly don't know how this behaviour could be fixed without breaking other functionality.