fixed the bug where changing the rotation of a selection of prims in a linkset, made each of those prims rotate around its own centre rather than around the geometric centre of the selection like they should do (and like the client expects).

This involved adding a new OnUpdatePrimSingleRotationPosition event to IClientAPI so that we can get the changed position from the client. 
Btw adding new events to IClientAPI is really tedious where you have to copy the change across to at least 5 or 6 other files. 
[Note this doesn't fix the bug where any rotation changes to the root prim (but not the whole linkset) cause rotation errors on the child prims.]

3 files changed, 87 insertions, 3 deletions

diff --git a/OpenSim/Region/Framework/Scenes/Scene.cs b/OpenSim/Region/Framework/Scenes/Scene.cs
index 81d54e7..63cf9ce 100644
--- a/OpenSim/Region/Framework/Scenes/Scene.cs
+++ b/OpenSim/Region/Framework/Scenes/Scene.cs
@@ -1964,6 +1964,7 @@ namespace OpenSim.Region.Framework.Scenes
             client.OnUpdatePrimGroupRotation += m_sceneGraph.UpdatePrimRotation;
             client.OnUpdatePrimGroupMouseRotation += m_sceneGraph.UpdatePrimRotation;
             client.OnUpdatePrimSingleRotation += m_sceneGraph.UpdatePrimSingleRotation;
+            client.OnUpdatePrimSingleRotationPosition += m_sceneGraph.UpdatePrimSingleRotationPosition;
             client.OnUpdatePrimScale += m_sceneGraph.UpdatePrimScale;
             client.OnUpdatePrimGroupScale += m_sceneGraph.UpdatePrimGroupScale;
             client.OnUpdateExtraParams += m_sceneGraph.UpdateExtraParam;
diff --git a/OpenSim/Region/Framework/Scenes/SceneGraph.cs b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
index 62870d5..3f63481 100644
--- a/OpenSim/Region/Framework/Scenes/SceneGraph.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneGraph.cs
@@ -1207,6 +1207,25 @@ namespace OpenSim.Region.Framework.Scenes
         /// <param name="localID"></param>
         /// <param name="rot"></param>
         /// <param name="remoteClient"></param>
+        protected internal void UpdatePrimSingleRotationPosition(uint localID, Quaternion rot, Vector3 pos, IClientAPI remoteClient)
+        {
+            SceneObjectGroup group = GetGroupByPrim(localID);
+            if (group != null)
+            {
+                if (m_parentScene.Permissions.CanMoveObject(group.UUID, remoteClient.AgentId))
+                {
+                    group.UpdateSingleRotation(rot,pos, localID);
+                }
+            }
+        }
+
+
+        /// <summary>
+        ///
+        /// </summary>
+        /// <param name="localID"></param>
+        /// <param name="rot"></param>
+        /// <param name="remoteClient"></param>
         protected internal void UpdatePrimRotation(uint localID, Quaternion rot, IClientAPI remoteClient)
         {
             SceneObjectGroup group = GetGroupByPrim(localID);
diff --git a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
index e987445..00ae504 100644
--- a/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
+++ b/OpenSim/Region/Framework/Scenes/SceneObjectGroup.cs
@@ -625,6 +625,8 @@ namespace OpenSim.Region.Framework.Scenes
                     Vector3 backBottomLeft;
                     Vector3 backBottomRight;
 
+                   // Vector3[] corners = new Vector3[8];
+
                     Vector3 orig = Vector3.Zero;
 
                     frontTopLeft.X = orig.X - (part.Scale.X / 2);
@@ -660,6 +662,36 @@ namespace OpenSim.Region.Framework.Scenes
                     backBottomRight.Y = orig.Y + (part.Scale.Y / 2);
                     backBottomRight.Z = orig.Z - (part.Scale.Z / 2);
 
+                    //m_log.InfoFormat("pre corner 1 is {0} {1} {2}", frontTopLeft.X, frontTopLeft.Y, frontTopLeft.Z);
+                    //m_log.InfoFormat("pre corner 2 is {0} {1} {2}", frontTopRight.X, frontTopRight.Y, frontTopRight.Z);
+                    //m_log.InfoFormat("pre corner 3 is {0} {1} {2}", frontBottomRight.X, frontBottomRight.Y, frontBottomRight.Z);
+                    //m_log.InfoFormat("pre corner 4 is {0} {1} {2}", frontBottomLeft.X, frontBottomLeft.Y, frontBottomLeft.Z);
+                    //m_log.InfoFormat("pre corner 5 is {0} {1} {2}", backTopLeft.X, backTopLeft.Y, backTopLeft.Z);
+                    //m_log.InfoFormat("pre corner 6 is {0} {1} {2}", backTopRight.X, backTopRight.Y, backTopRight.Z);
+                    //m_log.InfoFormat("pre corner 7 is {0} {1} {2}", backBottomRight.X, backBottomRight.Y, backBottomRight.Z);
+                    //m_log.InfoFormat("pre corner 8 is {0} {1} {2}", backBottomLeft.X, backBottomLeft.Y, backBottomLeft.Z);
+
+                    //for (int i = 0; i < 8; i++)
+                    //{
+                    //    corners[i] = corners[i] * worldRot;
+                    //    corners[i] += offset;
+
+                    //    if (corners[i].X > maxX)
+                    //        maxX = corners[i].X;
+                    //    if (corners[i].X < minX)
+                    //        minX = corners[i].X;
+
+                    //    if (corners[i].Y > maxY)
+                    //        maxY = corners[i].Y;
+                    //    if (corners[i].Y < minY)
+                    //        minY = corners[i].Y;
+
+                    //    if (corners[i].Z > maxZ)
+                    //        maxZ = corners[i].Y;
+                    //    if (corners[i].Z < minZ)
+                    //        minZ = corners[i].Z;
+                    //}
+
                     frontTopLeft = frontTopLeft * worldRot;
                     frontTopRight = frontTopRight * worldRot;
                     frontBottomLeft = frontBottomLeft * worldRot;
@@ -681,6 +713,15 @@ namespace OpenSim.Region.Framework.Scenes
                     backTopLeft += offset;
                     backTopRight += offset;
 
+                    //m_log.InfoFormat("corner 1 is {0} {1} {2}", frontTopLeft.X, frontTopLeft.Y, frontTopLeft.Z);
+                    //m_log.InfoFormat("corner 2 is {0} {1} {2}", frontTopRight.X, frontTopRight.Y, frontTopRight.Z);
+                    //m_log.InfoFormat("corner 3 is {0} {1} {2}", frontBottomRight.X, frontBottomRight.Y, frontBottomRight.Z);
+                    //m_log.InfoFormat("corner 4 is {0} {1} {2}", frontBottomLeft.X, frontBottomLeft.Y, frontBottomLeft.Z);
+                    //m_log.InfoFormat("corner 5 is {0} {1} {2}", backTopLeft.X, backTopLeft.Y, backTopLeft.Z);
+                    //m_log.InfoFormat("corner 6 is {0} {1} {2}", backTopRight.X, backTopRight.Y, backTopRight.Z);
+                    //m_log.InfoFormat("corner 7 is {0} {1} {2}", backBottomRight.X, backBottomRight.Y, backBottomRight.Z);
+                    //m_log.InfoFormat("corner 8 is {0} {1} {2}", backBottomLeft.X, backBottomLeft.Y, backBottomLeft.Z);
+
                     if (frontTopRight.X > maxX)
                         maxX = frontTopRight.X;
                     if (frontTopLeft.X > maxX)
@@ -801,15 +842,15 @@ namespace OpenSim.Region.Framework.Scenes
             if (lower > maxZ)
             {
                 offsetHeight = lower - (boundingBox.Z / 2);
-                
+
             }
             else if (maxZ > lower)
             {
                 offsetHeight = maxZ - (boundingBox.Z / 2);
                 offsetHeight *= -1;
             }
-            
-          //  m_log.InfoFormat("BoundingBox is {0} , {1} , {2} ", boundingBox.X, boundingBox.Y, boundingBox.Z);
+
+           // m_log.InfoFormat("BoundingBox is {0} , {1} , {2} ", boundingBox.X, boundingBox.Y, boundingBox.Z);
             return boundingBox;
         }
         #endregion
@@ -3017,6 +3058,29 @@ namespace OpenSim.Region.Framework.Scenes
         ///
         /// </summary>
         /// <param name="rot"></param>
+        /// <param name="localID"></param>
+        public void UpdateSingleRotation(Quaternion rot, Vector3 pos, uint localID)
+        {
+            SceneObjectPart part = GetChildPart(localID);
+            if (part != null)
+            {
+                if (part.UUID == m_rootPart.UUID)
+                {
+                    UpdateRootRotation(rot);
+                    AbsolutePosition = pos;
+                }
+                else
+                {
+                    part.UpdateRotation(rot);
+                    part.OffsetPosition = pos;
+                }
+            }
+        }
+
+        /// <summary>
+        ///
+        /// </summary>
+        /// <param name="rot"></param>
         private void UpdateRootRotation(Quaternion rot)
         {
             Quaternion axRot = rot;