s&box

PlayerControllerPlus/Modes/Sit.cs

Move mode that puts the player into a sitting state. It detects an ISitTarget on parent entities, disables the physics body and collider while sitting, delegates animator and eye transform updates to the chair, and asks the chair to make the player leave when failing a press.

namespace Sandbox.MovementPlus;

public sealed class SitMoveModePlus : MoveModePlus
{
	public override int Score( PlayerControllerPlus controller )
	{
		if ( controller.GetComponentInParent<ISitTarget>() is ISitTarget chair )
		{
			return 10000;
		}

		return -1;
	}

	public override void UpdateAnimator( SkinnedModelRenderer renderer )
	{
		if ( Controller.GetComponentInParent<ISitTarget>() is not ISitTarget chair )
			return;

		OnUpdateAnimatorVelocity( renderer );
		chair.UpdatePlayerAnimator( Controller, renderer );
	}

	public override void OnModeBegin()
	{
		base.OnModeBegin();

		Controller.Body.Enabled = false;
		Controller.ColliderObject.Enabled = false;
		Controller.EyeAngles = default;
	}

	public override void OnModeEnd( MoveModePlus next )
	{
		Controller.Body.Enabled = true;
		Controller.ColliderObject.Enabled = true;

		Controller.WorldRotation = Rotation.LookAt( Controller.EyeTransform.Forward.WithZ( 0 ), Vector3.Up );

		base.OnModeEnd( next );
	}

	public override Vector3 UpdateMove( Rotation eyes, Vector3 input )
	{
		return 0;
	}

	public override Transform CalculateEyeTransform()
	{
		if ( Controller.GetComponentInParent<ISitTarget>() is not ISitTarget chair )
		{
			return base.CalculateEyeTransform();
		}

		return chair.CalculateEyeTransform( Controller );
	}

	public void OnFailPressing()
	{
		if ( Controller.GetComponentInParent<ISitTarget>() is not ISitTarget chair )
			return;

		chair.AskToLeave( Controller );
	}
}

/// <summary>
/// A component that can be sat in by a player. If the player is parented to an object with this component, they will be sitting in it.
/// </summary>
public interface ISitTarget
{
	void UpdatePlayerAnimator( PlayerControllerPlus controller, SkinnedModelRenderer renderer );
	Transform CalculateEyeTransform( PlayerControllerPlus controller );
	void AskToLeave( PlayerControllerPlus controller );
}