feat(NetworkTranformBase): Provide velocity and angular velocity (#3909)

* feat(NetworkTranformBase): Provide velocity and angular velocity

* Update NetworkTransformBase.cs

---------

Co-authored-by: mischa <[email protected]>

Assets/Mirror/Components/NetworkTransform/NetworkTransformBase.cs

@@ -119,6 +119,11 @@ public uint sendIntervalMultiplier
         protected double timeStampAdjustment => NetworkServer.sendInterval * (sendIntervalMultiplier - 1);
         protected double offset => timelineOffset ? NetworkServer.sendInterval * sendIntervalMultiplier : 0;
 
+        // velocity for covenience (animators etc.)
+        // this isn't technically NetworkTransforms job, but it's needed by so many projects that we just provide it anyway.
+        public Vector3 velocity { get; private set; }
+        public Vector3 angularVelocity { get; private set; }
+
         // debugging ///////////////////////////////////////////////////////////
         [Header("Debug")]
         public bool showGizmos;
@@ -263,6 +268,14 @@ protected virtual void Apply(TransformSnapshot interpolated, TransformSnapshot e
             // -> but simply don't apply it. if the user doesn't want to sync
             //    scale, then we should not touch scale etc.
 
+            // calculate the velocity and angular velocity for the object
+            // these can be used to drive animations or other behaviours
+            if (!isOwned && Time.deltaTime > 0)
+            {
+                velocity = (transform.position - interpolated.position) / Time.deltaTime;
+                angularVelocity = (transform.rotation.eulerAngles - interpolated.rotation.eulerAngles) / Time.deltaTime;
+            }
+
             // interpolate parts
             if (syncPosition) SetPosition(interpolatePosition ? interpolated.position : endGoal.position);
             if (syncRotation) SetRotation(interpolateRotation ? interpolated.rotation : endGoal.rotation);