Simian: Added Animation struct and AnimationSet class (adapted from OpenSim) to track avatar animations

git-svn-id: http://libopenmetaverse.googlecode.com/svn/trunk@2157 52acb1d6-8a22-11de-b505-999d5b087335

Programs/Simian/AnimationSet.cs

@@ -0,0 +1,157 @@
+using System;
+using System.Collections.Generic;
+using System.Threading;
+using OpenMetaverse;
+
+namespace Simian
+{
+    public struct Animation
+    {
+        public UUID ID;
+        public int SequenceNum;
+
+        public Animation(UUID id, int sequenceNum)
+        {
+            ID = id;
+            SequenceNum = sequenceNum;
+        }
+    }
+
+    public class AnimationSet
+    {
+        private Animation defaultAnimation;
+        private List<Animation> animations = new List<Animation>();
+
+        public AnimationSet()
+        {
+            ResetDefaultAnimation();
+        }
+
+        public bool HasAnimation(UUID animID)
+        {
+            if (defaultAnimation.ID == animID)
+                return true;
+
+            lock (animations)
+            {
+                for (int i = 0; i < animations.Count; ++i)
+                {
+                    if (animations[i].ID == animID)
+                        return true;
+                }
+            }
+
+            return false;
+        }
+
+        public bool Add(UUID animID, ref int sequenceCounter)
+        {
+            lock (animations)
+            {
+                if (!HasAnimation(animID))
+                {
+                    int sequenceNum = Interlocked.Increment(ref sequenceCounter);
+                    animations.Add(new Animation(animID, sequenceNum));
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        public bool Add(UUID animID, int sequenceNum)
+        {
+            lock (animations)
+            {
+                if (!HasAnimation(animID))
+                {
+                    animations.Add(new Animation(animID, sequenceNum));
+                    return true;
+                }
+            }
+
+            return false;
+        }
+
+        public bool Remove(UUID animID)
+        {
+            if (defaultAnimation.ID == animID)
+            {
+                ResetDefaultAnimation();
+                return true;
+            }
+            else if (HasAnimation(animID))
+            {
+                lock (animations)
+                {
+                    for (int i = 0; i < animations.Count; i++)
+                    {
+                        if (animations[i].ID == animID)
+                        {
+                            animations.RemoveAt(i);
+                            return true;
+                        }
+                    }
+                }
+            }
+
+            return false;
+        }
+
+        public void Clear()
+        {
+            ResetDefaultAnimation();
+            lock (animations) animations.Clear();
+        }
+
+        public bool SetDefaultAnimation(UUID animID, ref int sequenceCounter)
+        {
+            if (defaultAnimation.ID != animID)
+            {
+                int sequenceNum = Interlocked.Increment(ref sequenceCounter);
+                defaultAnimation = new Animation(animID, sequenceNum);
+                return true;
+            }
+            else
+            {
+                return false;
+            }
+        }
+
+        public bool SetDefaultAnimation(UUID animID, int sequenceNum)
+        {
+            if (defaultAnimation.ID != animID)
+            {
+                defaultAnimation = new Animation(animID, sequenceNum);
+                return true;
+            }
+            else
+            {
+                return false;
+            }
+        }
+
+        public void GetArrays(out UUID[] animIDs, out int[] sequenceNums)
+        {
+            lock (animations)
+            {
+                animIDs = new UUID[animations.Count + 1];
+                sequenceNums = new int[animations.Count + 1];
+
+                animIDs[0] = defaultAnimation.ID;
+                sequenceNums[0] = defaultAnimation.SequenceNum;
+
+                for (int i = 0; i < animations.Count; ++i)
+                {
+                    animIDs[i + 1] = animations[i].ID;
+                    sequenceNums[i + 1] = animations[i].SequenceNum;
+                }
+            }
+        }
+
+        protected bool ResetDefaultAnimation()
+        {
+            return SetDefaultAnimation(Animations.STAND, 1);
+        }
+    }
+}