More multiplayer fixes

core/src/mindustry/entities/comp/HitboxComp.java

@@ -1,6 +1,7 @@
 package mindustry.entities.comp;
 
 import arc.func.*;
+import arc.math.*;
 import arc.math.geom.QuadTree.*;
 import arc.math.geom.*;
 import mindustry.annotations.Annotations.*;
@@ -48,6 +49,14 @@ abstract class HitboxComp implements Posc, QuadTreeObject{
         return y - lastY;
     }
 
+    float deltaLen(){
+        return Mathf.len(deltaX(), deltaY());
+    }
+
+    float deltaAngle(){
+        return Mathf.angle(deltaX(), deltaY());
+    }
+
     boolean collides(Hitboxc other){
         return true;
     }

core/src/mindustry/entities/comp/MechComp.java

@@ -12,8 +12,8 @@ abstract class MechComp implements Posc, Flyingc, Hitboxc, Unitc, Mechc, Elevati
 
     @Override
     public void update(){
-        float len = vel().len();
-        baseRotation = Angles.moveToward(baseRotation, vel().angle(), type().baseRotateSpeed * Mathf.clamp(len / type().speed));
+        float len = deltaLen();
+        baseRotation = Angles.moveToward(baseRotation, deltaAngle(), type().baseRotateSpeed * Mathf.clamp(len / type().speed));
         walkTime += Time.delta()*len;
     }
 }