33 lines
1.5 KiB
C#
33 lines
1.5 KiB
C#
using CultMath;
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using static CultMath.math;
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// The player's face-the-aim state, engine-free. Held follows the Face Aim hold input each frame; Latched is
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// flipped by the Caps Lock press. Either one faces the aim; neither leaves the hull to the turn axis.
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// Runtime only, never saved: Latched starts false each session.
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public class HelmInput
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{
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public bool Held;
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public bool Latched;
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public bool FaceAim => Held || Latched;
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public void Toggle() => Latched = !Latched;
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private float _turnAxis;
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// The turn axis as the helm reads it. A digital input (keys) ramps up while held and back down while released, both at
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// full scale per rampTime, so tapping at a rate holds a gentle turn; reversing cuts to zero and ramps the other way.
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// An analog input passes straight through.
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public float TurnAxis(float raw, bool digital, float dt, float rampTime)
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{
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if (!digital || rampTime <= 0) return _turnAxis = raw;
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var step = dt / rampTime;
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if (raw == 0) return _turnAxis = sign(_turnAxis) * max(0f, abs(_turnAxis) - step);
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if (sign(raw) != sign(_turnAxis)) _turnAxis = 0;
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return _turnAxis = sign(raw) * min(abs(raw), abs(_turnAxis) + step);
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}
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// The turn the player commands: the aim heading, resolved against the hull at each sim step, or the turn axis.
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public TurnCommand Demand(float2 aim, float turnAxis) =>
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FaceAim ? TurnCommand.Toward(aim) : TurnCommand.OfRate(clamp(turnAxis, -1f, 1f));
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}
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