File size: 2,060 Bytes
18a519f | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 | namespace Unity.VisualScripting
{
/// <summary>
/// Executes an action only once, and a different action afterwards.
/// </summary>
[UnitCategory("Control")]
[UnitOrder(14)]
public sealed class Once : Unit, IGraphElementWithData
{
public sealed class Data : IGraphElementData
{
public bool executed;
}
/// <summary>
/// The entry point for the action.
/// </summary>
[DoNotSerialize]
[PortLabelHidden]
public ControlInput enter { get; private set; }
/// <summary>
/// Trigger to reset the once check.
/// </summary>
[DoNotSerialize]
public ControlInput reset { get; private set; }
/// <summary>
/// The action to execute the first time the node is entered.
/// </summary>
[DoNotSerialize]
public ControlOutput once { get; private set; }
/// <summary>
/// The action to execute subsequently.
/// </summary>
[DoNotSerialize]
public ControlOutput after { get; private set; }
protected override void Definition()
{
enter = ControlInput(nameof(enter), Enter);
reset = ControlInput(nameof(reset), Reset);
once = ControlOutput(nameof(once));
after = ControlOutput(nameof(after));
Succession(enter, once);
Succession(enter, after);
}
public IGraphElementData CreateData()
{
return new Data();
}
public ControlOutput Enter(Flow flow)
{
var data = flow.stack.GetElementData<Data>(this);
if (!data.executed)
{
data.executed = true;
return once;
}
else
{
return after;
}
}
public ControlOutput Reset(Flow flow)
{
flow.stack.GetElementData<Data>(this).executed = false;
return null;
}
}
}
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