func (item *Item) UnmarshalNbt(tag *nbt.Compound) (err os.Error) {
if err = item.PointObject.UnmarshalNbt(tag); err != nil {
return
}
itemInfo, ok := tag.Lookup("Item").(*nbt.Compound)
if !ok {
return os.NewError("bad item data")
}
// Grab the basic item data
id, idOk := itemInfo.Lookup("id").(*nbt.Short)
count, countOk := itemInfo.Lookup("Count").(*nbt.Byte)
data, dataOk := itemInfo.Lookup("Damage").(*nbt.Short)
if !idOk || !countOk || !dataOk {
return os.NewError("bad item data")
}
item.Slot = Slot{
ItemTypeId: types.ItemTypeId(id.Value),
Count: types.ItemCount(count.Value),
Data: types.ItemData(data.Value),
}
return nil
}
// MergeBlockItems creates default item types from a defined list of block
// types. It does not override any pre-existing items types.
func (btl *BlockTypeList) CreateBlockItemTypes(itemTypes ItemTypeMap) {
for id := range *btl {
blockType := &(*btl)[id]
if !blockType.defined {
continue
}
if itemType, exists := itemTypes[types.ItemTypeId(id)]; exists {
if len(itemType.Name) == 0 {
itemType.Name = blockType.Name
}
if itemType.MaxStack == 0 {
itemType.MaxStack = MaxStackDefault
}
continue
}
itemTypes[types.ItemTypeId(id)] = &ItemType{
Id: types.ItemTypeId(id),
Name: blockType.Name,
MaxStack: MaxStackDefault,
}
}
}