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code/tools/Wheel.cs

@@ -0,0 +1,83 @@
+namespace Sandbox.Tools
+{
+	[Library( "tool_wheel", Title = "Wheel", Description = "A wheel that you can turn on and off (but actually can't yet)", Group = "construction" )]
+	public partial class WheelTool : BaseTool
+	{
+		PreviewEntity previewModel;
+
+		protected override bool IsPreviewTraceValid( TraceResult tr )
+		{
+			if ( !base.IsPreviewTraceValid( tr ) )
+				return false;
+
+			if ( tr.Entity is WheelEntity )
+				return false;
+
+			return true;
+		}
+
+		public override void CreatePreviews()
+		{
+			if ( TryCreatePreview( ref previewModel, "models/citizen_props/wheel01.vmdl" ) )
+			{
+				previewModel.RotationOffset = Rotation.FromAxis( Vector3.Up, 90 );
+			}
+		}
+
+		public override void Simulate()
+		{
+			if ( !Host.IsServer )
+				return;
+
+			using ( Prediction.Off() )
+			{
+				if ( !Input.Pressed( InputButton.Attack1 ) )
+					return;
+
+				var startPos = Owner.EyePos;
+				var dir = Owner.EyeRot.Forward;
+
+				var tr = Trace.Ray( startPos, startPos + dir * MaxTraceDistance )
+					.Ignore( Owner )
+					.Run();
+
+				if ( !tr.Hit )
+					return;
+
+				if ( !tr.Entity.IsValid() )
+					return;
+
+				var attached = !tr.Entity.IsWorld && tr.Body.IsValid() && tr.Body.PhysicsGroup != null && tr.Body.Entity.IsValid();
+
+				if ( attached && tr.Entity is not Prop )
+					return;
+
+				CreateHitEffects( tr.EndPos );
+
+				if ( tr.Entity is WheelEntity )
+				{
+					// TODO: Set properties
+
+					return;
+				}
+
+				var ent = new WheelEntity
+				{
+					Position = tr.EndPos,
+					Rotation = Rotation.LookAt( tr.Normal ) * Rotation.From( new Angles( 0, 90, 0 ) ),
+				};
+
+				ent.SetModel( "models/citizen_props/wheel01.vmdl" );
+
+				ent.PhysicsBody.Mass = tr.Body.Mass;
+
+				ent.Joint = PhysicsJoint.Revolute
+					.From( ent.PhysicsBody )
+					.To( tr.Body )
+					.WithPivot( tr.EndPos )
+					.WithBasis( Rotation.LookAt( tr.Normal ) * Rotation.From( new Angles( 90, 0, 0 ) ) )
+					.Create();
+			}
+		}
+	}
+}