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code/entities/ThrusterEntity.Effects.cs

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+using Sandbox;
+
+public partial class ThrusterEntity
+{
+	private Particles effects;
+
+	[Event.Frame]
+	public void OnFrame()
+	{
+		UpdateEffects();
+	}
+
+	protected void CreateEffects()
+	{
+		if ( effects != null )
+			return;
+
+		effects = Particles.Create( "particles/physgun_end_nohit.vpcf" );
+	}
+
+	protected virtual void KillEffects()
+	{
+		if ( effects == null )
+			return;
+
+		effects.Destroy( false );
+		effects = null;
+	}
+
+	protected virtual void UpdateEffects()
+	{
+		if ( Enabled )
+		{
+			CreateEffects();
+		}
+		else
+		{
+			KillEffects();
+		}
+
+		if ( effects == null )
+			return;
+
+		effects.SetPosition( 0, Position + Rotation.Up * 20 );
+	}
+}