Anim tweaking, simplified (+ non-broken) water drag logic

Subsurface/Source/Physics/PhysicsBody.cs

@@ -382,24 +382,16 @@ namespace Barotrauma
             //buoyancy
             Vector2 buoyancy = new Vector2(0, Mass * 9.6f);
 
-            //drag
-            Vector2 velDir = Vector2.Normalize(LinearVelocity);
-
-            Vector2 line = new Vector2((float)Math.Cos(body.Rotation), (float)Math.Sin(body.Rotation));
-            line *= Math.Max(height + radius*2, height);
-
-            Vector2 normal = new Vector2(-line.Y, line.X);
-            normal = Vector2.Normalize(-normal);
-
-            float dragDot = Math.Abs(Vector2.Dot(normal, velDir));
             Vector2 dragForce = Vector2.Zero;
-            if (dragDot > 0)
+
+            if (LinearVelocity.LengthSquared() > 0.00001f)
             {
+                //drag
+                Vector2 velDir = Vector2.Normalize(LinearVelocity);
+
                 float vel = LinearVelocity.Length() * 2.0f;
-                float drag = dragDot * vel * vel
-                    * Math.Max(height + radius * 2, height);
-                dragForce = Math.Min(drag, Mass * 1000.0f) * -velDir;
-                //if (dragForce.Length() > 100.0f) { }
+                float drag = vel * vel * Math.Max(height + radius * 2, height);
+                dragForce = Math.Min(drag, Mass * 500.0f) * -velDir;                
             }
 
             body.ApplyForce(dragForce + buoyancy);