// placeBlock attempts to place a block. This is called by PlayerBlockInteract
// in the situation where the player interacts with an attachable block
// (potentially in a different chunk to the one where the block gets placed).
func (chunk *Chunk) reqPlaceItem(player gamerules.IPlayerClient, target *BlockXyz, slot *gamerules.Slot) {
// TODO defer a check for remaining items in slot, and do something with them
// (send to player or drop on the ground).
// TODO more flexible item checking for block placement (e.g placing seed
// items on farmland doesn't fit this current simplistic model). The block
// type for the block being placed against should probably contain this logic
// (i.e farmland block should know about the seed item).
heldBlockType, ok := slot.ItemTypeId.ToBlockId()
if !ok || slot.Count < 1 {
// Not a placeable item.
return
}
index, subLoc, ok := chunk.getBlockIndexByBlockXyz(target)
if !ok {
return
}
// Blocks can only replace certain blocks.
blockTypeId := index.BlockId(chunk.blocks)
blockType, ok := gamerules.Blocks.Get(blockTypeId)
if !ok || !blockType.Replaceable {
return
}
// Safe to replace block.
chunk.setBlock(target, subLoc, index, heldBlockType, byte(slot.Data))
// Allow this block to tick once
chunk.AddActiveBlockIndex(index)
slot.Decrement()
}
// Implementing IInventorySubscriber - relays inventory changes to the viewer
// of the window.
func (iv *inventoryView) SlotUpdate(slot *gamerules.Slot, slotId SlotId) {
buf := new(bytes.Buffer)
slot.SendUpdate(buf, iv.window.windowId, iv.startSlot+slotId)
iv.window.viewer.TransmitPacket(buf.Bytes())
}