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code/tools/Weld.cs

@@ -0,0 +1,96 @@
+namespace Sandbox.Tools
+{
+	[Library( "tool_weld", Title = "Weld", Description = "Weld stuff together", Group = "construction" )]
+	public partial class WeldTool : BaseTool
+	{
+		private Prop target;
+
+		public override void Simulate()
+		{
+			if ( !Host.IsServer )
+				return;
+
+			using ( Prediction.Off() )
+			{
+				var startPos = Owner.EyePos;
+				var dir = Owner.EyeRot.Forward;
+
+				var tr = Trace.Ray( startPos, startPos + dir * MaxTraceDistance )
+					.Ignore( Owner )
+					.Run();
+
+				if ( !tr.Hit || !tr.Body.IsValid() || !tr.Entity.IsValid() || tr.Entity.IsWorld )
+					return;
+
+				if ( tr.Entity.PhysicsGroup == null || tr.Entity.PhysicsGroup.BodyCount > 1 )
+					return;
+
+				if ( tr.Entity is not Prop prop )
+					return;
+
+				if ( Input.Pressed( InputButton.Attack1 ) )
+				{
+					if ( prop.Root is not Prop rootProp )
+					{
+						return;
+					}
+
+					if ( target == rootProp )
+						return;
+
+					if ( !target.IsValid() )
+					{
+						target = rootProp;
+					}
+					else
+					{
+						target.Weld( rootProp );
+						target = null;
+					}
+				}
+				else if ( Input.Pressed( InputButton.Attack2 ) )
+				{
+					prop.Unweld( true );
+
+					Reset();
+				}
+				else if ( Input.Pressed( InputButton.Reload ) )
+				{
+					if ( prop.Root is not Prop rootProp )
+					{
+						return;
+					}
+
+					rootProp.Unweld();
+
+					Reset();
+				}
+				else
+				{
+					return;
+				}
+
+				CreateHitEffects( tr.EndPos );
+			}
+		}
+
+		private void Reset()
+		{
+			target = null;
+		}
+
+		public override void Activate()
+		{
+			base.Activate();
+
+			Reset();
+		}
+
+		public override void Deactivate()
+		{
+			base.Deactivate();
+
+			Reset();
+		}
+	}
+}