Adds grappling gun (#16662)

Content.Shared/Physics/JointVisualsComponent.cs

@@ -0,0 +1,29 @@
+using Robust.Shared.GameStates;
+using Robust.Shared.Utility;
+
+namespace Content.Shared.Physics;
+
+/// <summary>
+/// Just draws a generic line between this entity and the target.
+/// </summary>
+[RegisterComponent, NetworkedComponent, AutoGenerateComponentState]
+public sealed partial class JointVisualsComponent : Component
+{
+    [ViewVariables(VVAccess.ReadWrite), DataField("sprite", required: true), AutoNetworkedField]
+    public SpriteSpecifier Sprite = default!;
+
+    [ViewVariables(VVAccess.ReadWrite), DataField("target"), AutoNetworkedField]
+    public EntityUid? Target;
+
+    /// <summary>
+    /// Offset from Body A.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite), DataField("offsetA"), AutoNetworkedField]
+    public Vector2 OffsetA;
+
+    /// <summary>
+    /// Offset from Body B.
+    /// </summary>
+    [ViewVariables(VVAccess.ReadWrite), DataField("offsetB"), AutoNetworkedField]
+    public Vector2 OffsetB;
+}