* Added basic 3-5 level undo on prim position/rotation/scale.

* In the future this should be a config option...   and, hopefully this tides the builders over for a little while.

OpenSim/Region/Environment/Scenes/UndoState.cs

@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) Contributors, http://opensimulator.org/
+ * See CONTRIBUTORS.TXT for a full list of copyright holders.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *     * Redistributions of source code must retain the above copyright
+ *       notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above copyright
+ *       notice, this list of conditions and the following disclaimer in the
+ *       documentation and/or other materials provided with the distribution.
+ *     * Neither the name of the OpenSim Project nor the
+ *       names of its contributors may be used to endorse or promote products
+ *       derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+ * DISCLAIMED. IN NO EVENT SHALL THE CONTRIBUTORS BE LIABLE FOR ANY
+ * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+ * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+using System;
+using System.Collections.Generic;
+using libsecondlife;
+
+namespace OpenSim.Region.Environment.Scenes
+{
+    public class UndoState
+    {
+        public LLVector3 Position = LLVector3.Zero;
+        public LLVector3 Scale = LLVector3.Zero;
+        public LLQuaternion Rotation = LLQuaternion.Identity;
+
+        public UndoState(LLVector3 pos, LLQuaternion rot, LLVector3 scale)
+        {
+            Position = pos;
+            Rotation = rot;
+            Scale = scale;
+        }
+        
+        public UndoState(SceneObjectPart part)
+        {
+            if (part != null)
+            {
+                if (part.ParentID == 0)
+                {
+                    Position = part.AbsolutePosition;
+                    Rotation = part.RotationOffset;
+                    
+                }
+                else
+                {
+                    Position = part.GroupPosition;
+                    Rotation = part.RotationOffset;
+                    Scale = part.Shape.Scale;
+
+                }
+            }
+        }
+
+        public bool Compare(SceneObjectPart part)
+        {
+            if (part != null)
+            {
+                if (part.ParentID == 0)
+                {
+                    if (Position == part.AbsolutePosition && Rotation == part.RotationOffset)
+                        return true;
+                    else
+                        return false;
+                }
+                else
+                {
+                    if (Position == part.GroupPosition && Rotation == part.RotationOffset && Scale == part.Shape.Scale)
+                        return true;
+                    else
+                        return false;
+
+                }
+            }
+            return false;
+        }
+
+        public void PlaybackState(SceneObjectPart part)
+        {
+            if (part != null)
+            {
+                part.m_undoing = true;
+                
+                if (part.ParentID == 0)
+                {
+                    part.ParentGroup.AbsolutePosition = Position;
+                    part.UpdateRotation(Rotation);
+                    part.ParentGroup.ScheduleGroupForTerseUpdate();
+                }
+                else
+                {
+                    part.OffsetPosition = Position;
+                    part.UpdateRotation(Rotation);
+                    part.Resize(Scale);
+                    part.ScheduleTerseUpdate();
+                }
+                part.m_undoing = false;
+                
+            }
+        }
+
+        public UndoState()
+        {
+        }
+    }
+}