Implement special cases for block drops

This does not include things that require certain tools, such as
cobblestone.

README.md

@@ -39,7 +39,7 @@ SharpDevelop or something equally idiot-proof.
 ## Get Involved
 
 If you want to keep up with development or contribute, join #truecraft on
-irc.esper.net. Pull request will be rejected from authors who have read any
+irc.esper.net. Pull requests will be rejected from authors who have read any
 decompiled official Minecraft code.
 
 ## Roadmap

TrueCraft.API/Entities/IEntity.cs

@@ -12,6 +12,8 @@ namespace TrueCraft.API.Entities
         Vector3 Position { get; set; }
         float Yaw { get; set; }
         float Pitch { get; set; }
+        bool Despawned { get; set; }
+        DateTime SpawnTime { get; set; }
         MetadataDictionary Metadata { get; }
         Size Size { get; }
         bool SendMetadataToClients { get; }

TrueCraft.Core/Entities/Entity.cs

@@ -19,7 +19,7 @@ namespace TrueCraft.Core.Entities
             SpawnTime = DateTime.Now;
         }
 
-        protected DateTime SpawnTime { get; set; }
+        public DateTime SpawnTime { get; set; }
 
         public int EntityID { get; set; }
 
@@ -67,6 +67,8 @@ namespace TrueCraft.Core.Entities
             }
         }
 
+        public bool Despawned { get; set; }
+
         public abstract Size Size { get; }
 
         public abstract IPacket SpawnPacket { get; }

TrueCraft.Core/Entities/ItemEntity.cs

@@ -19,13 +19,10 @@ namespace TrueCraft.Core.Entities
         {
             Position = position;
             Item = item;
-            SpawnTime = DateTime.Now;
         }
 
         public ItemStack Item { get; set; }
 
-        private DateTime SpawnTime { get; set; }
-
         public override IPacket SpawnPacket
         {
             get
@@ -109,6 +106,7 @@ namespace TrueCraft.Core.Entities
                     playerEntity.OnPickUpItem(this);
                     entityManager.DespawnEntity(this);
                 }
+                /* TODO: Merging item entities (this code behaves strangely
                 var item = nearbyEntities.FirstOrDefault(e => e is ItemEntity
                     && e != this
                     && (DateTime.Now - (e as ItemEntity).SpawnTime).TotalSeconds > 1
@@ -123,7 +121,7 @@ namespace TrueCraft.Core.Entities
                     newItem.Count += (item as ItemEntity).Item.Count;
                     Item = newItem;
                     OnPropertyChanged("Metadata");
-                }
+                }*/
             }
         }
 

TrueCraft.Core/Logic/BlockProvider.cs

@@ -25,8 +25,11 @@ namespace TrueCraft.Core.Logic
         public virtual void BlockMined(BlockDescriptor descriptor, BlockFace face, IWorld world, IRemoteClient user)
         {
             var entityManager = user.Server.GetEntityManagerForWorld(world);
-            entityManager.SpawnEntity(new ItemEntity(new Vector3(descriptor.Coordinates) + new Vector3(0.5),
-                new ItemStack(descriptor.ID, 1, descriptor.Metadata)));
+            var items = GetDrop(descriptor);
+            foreach (var item in items)
+            {
+                entityManager.SpawnEntity(new ItemEntity(new Vector3(descriptor.Coordinates) + new Vector3(0.5), item));
+            }
             world.SetBlockID(descriptor.Coordinates, 0);
         }
 
@@ -40,6 +43,11 @@ namespace TrueCraft.Core.Logic
             // This space intentionally left blank
         }
 
+        protected virtual ItemStack[] GetDrop(BlockDescriptor descriptor) // TODO: Include tools
+        {
+            return new[] { new ItemStack(descriptor.ID, 1, descriptor.Metadata) };
+        }
+
         short IItemProvider.ID
         {
             get

TrueCraft.Core/Logic/Blocks/GrassBlock.cs

@@ -1,5 +1,7 @@
 using System;
 using TrueCraft.API.Logic;
+using TrueCraft.API;
+using TrueCraft.API.World;
 
 namespace TrueCraft.Core.Logic.Blocks
 {
@@ -23,5 +25,10 @@ namespace TrueCraft.Core.Logic.Blocks
         {
             return new Tuple<int, int>(3, 0);
         }
+
+        protected override ItemStack[] GetDrop(BlockDescriptor descriptor)
+        {
+            return new[] { new ItemStack(DirtBlock.BlockID, 1) };
+        }
     }
 }

TrueCraft/EntityManager.cs

@@ -145,7 +145,7 @@ namespace TrueCraft
 
         public void SpawnEntity(IEntity entity)
         {
-            
+            entity.SpawnTime = DateTime.Now;
             entity.EntityID = NextEntityID++;
             entity.PropertyChanged -= HandlePropertyChanged;
             entity.PropertyChanged += HandlePropertyChanged;
@@ -168,6 +168,7 @@ namespace TrueCraft
         public void DespawnEntity(IEntity entity)
         {
             PendingDespawns.Add(entity);
+            entity.Despawned = true;
         }
 
         public IEntity GetEntityByID(int id)
@@ -184,6 +185,7 @@ namespace TrueCraft
                 {
                     foreach (var e in Entities)
                     {
+                        if (!e.Despawned)
                             e.Update(this);
                     }
                 }