RealisticWater: Option to set Rigidbody kinematic when outside water area (so they don't drop).

Buoyancy.cs.patch

diff --git a/Assets/RealisticWater/Scripts/Water/Buoyancy.cs b/Assets/RealisticWater/Scripts/Water/Buoyancy.cs
index ff7d8cd..3524578 100644
--- a/Assets/RealisticWater/Scripts/Water/Buoyancy.cs	
+++ b/Assets/RealisticWater/Scripts/Water/Buoyancy.cs	
@@ -1,3 +1,4 @@
+using System;
 using System.Collections.Generic;
 using UnityEngine;
 
@@ -8,6 +9,8 @@ public class Buoyancy : MonoBehaviour
     public bool IsConcave = false;
     public int VoxelsLimit = 16;
     public float WaveVelocity = 0.05f;
+    [SerializeField]
+    private bool disablePhysicsWhenNoRipples = false;
 
     private const float Dampfer = 0.1f;
     private const float WaterDensity = 1000;
@@ -18,6 +21,7 @@ public class Buoyancy : MonoBehaviour
     private bool isMeshCollider;
     private List<Vector3[]> forces;
     private WaterRipples waterRipples;
+    private Rigidbody rb;
 
 
     /// <summary>
@@ -52,22 +56,16 @@ public class Buoyancy : MonoBehaviour
         {
             voxelHalfHeight = bounds.size.z;
         }
-        voxelHalfHeight /= 2 * SlicesPerAxis;
 
-        // The object must have a RidigBody
-        if (GetComponent<Rigidbody>() == null)
-        {
-            gameObject.AddComponent<Rigidbody>();
-            Debug.LogWarning(string.Format("[Buoyancy.cs] Object \"{0}\" had no Rigidbody. Rigidbody has been added.", name));
-        }
-        GetComponent<Rigidbody>().centerOfMass = new Vector3(0, -bounds.extents.y * 0f, 0) + transform.InverseTransformPoint(bounds.center);
+        voxelHalfHeight /= 2 * SlicesPerAxis;
 
+        rb.centerOfMass = new Vector3(0, -bounds.extents.y * 0f, 0) + transform.InverseTransformPoint(bounds.center);
         voxels = SliceIntoVoxels(isMeshCollider && IsConcave);
 
         transform.rotation = originalRotation;
         transform.position = originalPosition;
 
-        float volume = GetComponent<Rigidbody>().mass / Density;
+        float volume = rb.mass / Density;
 
         WeldPoints(voxels, VoxelsLimit);
 
@@ -237,13 +235,13 @@ public class Buoyancy : MonoBehaviour
                     k = 0f;
                 }
 
-                var velocity = GetComponent<Rigidbody>().GetPointVelocity(wp);
-                var localDampingForce = -velocity*Dampfer*GetComponent<Rigidbody>().mass;
+                var velocity = rb.GetPointVelocity(wp);
+                var localDampingForce = -velocity*Dampfer*rb.mass;
 
                 Vector3 force = localDampingForce + Mathf.Sqrt(k)*(normal*localArchimedesForce);
                 //Debug.DrawRay(wp, Mathf.Sqrt(k)*(WaterHit.normal*localArchimedesForce), Color.blue);
 
-                GetComponent<Rigidbody>().AddForceAtPosition(force, wp);
+                rb.AddForceAtPosition(force, wp);
 
                 forces.Add(new[] {wp, force}); // For drawing force gizmos
             }
@@ -270,19 +268,57 @@ public class Buoyancy : MonoBehaviour
         foreach (var force in forces)
         {
             Gizmos.DrawCube(force[0], new Vector3(gizmoSize, gizmoSize, gizmoSize));
-            Gizmos.DrawLine(force[0], force[0] + force[1] / GetComponent<Rigidbody>().mass);
+            Gizmos.DrawLine(force[0], force[0] + force[1] / rb.mass);
         }
     }
 
     void OnTriggerEnter(Collider collidedObj)
     {
         var temp = collidedObj.GetComponent<WaterRipples>();
-        if (temp!=null)
+        if (temp!=null) {
             waterRipples=temp;
+            updateRigidbodyEnabled();
+        }
+    }
+
+    void OnTriggerExit(Collider collidedObj)
+    {
+        var temp = collidedObj.GetComponent<WaterRipples>();
+        if (temp != null) // was it the WaterRipples Collider we just exited?
+        {
+            waterRipples = null;
+            updateRigidbodyEnabled();
+        }
     }
 
     void OnEnable()
     {
+        // The object must have a RidigBody
+        rb = GetComponent<Rigidbody>();
+        if (rb == null)
+        {
+            rb = gameObject.AddComponent<Rigidbody>();
+            Debug.LogWarning(string.Format("[Buoyancy.cs] Object \"{0}\" had no Rigidbody. Rigidbody has been added.", name));
+        }
+        
         waterRipples = null;
+        updateRigidbodyEnabled();
+    }
+
+    void OnDisable()
+    {
+        waterRipples = null;
+        updateRigidbodyEnabled();
+    }
+
+    private void updateRigidbodyEnabled()
+    {
+        if (!disablePhysicsWhenNoRipples)
+        {
+            return;
+        }
+
+        rb.isKinematic = (null == waterRipples);
     }
-}
\ No newline at end of file
+
+}