ItemTrapdoor.h

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#pragma once
 
#include "ItemHandler.h"
#include "Blocks/BlockTrapdoor.h"
 
 
 
 
 
class cItemTrapdoorHandler final  :
    public cItemHandler
{
    using Super = cItemHandler;
 
public:
 
    using Super::Super;
 
private:
 
    inline static NIBBLETYPE BlockFaceToMetaData(eBlockFace a_BlockFace)
    {
        switch (a_BlockFace)
        {
            case BLOCK_FACE_ZP: return 0x1;
            case BLOCK_FACE_ZM: return 0x0;
            case BLOCK_FACE_XP: return 0x3;
            case BLOCK_FACE_XM: return 0x2;
            default: UNREACHABLE("Unsupported block face");
        }
    }
 
 
    virtual bool CommitPlacement(cPlayer & a_Player, const cItem & a_HeldItem, const Vector3i a_PlacePosition, const eBlockFace a_ClickedBlockFace, const Vector3i a_CursorPosition) const override
    {
        NIBBLETYPE Meta;
 
        if (a_ClickedBlockFace == BLOCK_FACE_YP)
        {
            // Trapdoor is placed on top of a block.
            // Engage yaw rotation to determine hinge direction:
            Meta = cBlockTrapdoorHandler::YawToMetaData(a_Player.GetYaw());
        }
        else if (a_ClickedBlockFace == BLOCK_FACE_YM)
        {
            // Trapdoor is placed on bottom of a block.
            // Engage yaw rotation to determine hinge direction, and toggle 'Move up half-block' bit on:
            Meta = cBlockTrapdoorHandler::YawToMetaData(a_Player.GetYaw()) | 0x8;
        }
        else
        {
            // Placement on block sides; hinge direction is determined by which side was clicked:
            Meta = BlockFaceToMetaData(a_ClickedBlockFace);
 
            if (a_CursorPosition.y > 7)
            {
                // Trapdoor is placed on a higher half of a vertical block.
                // Toggle 'Move up half-block' bit on:
                Meta |= 0x8;
            }
        }
 
        return a_Player.PlaceBlock(a_PlacePosition, static_cast<BLOCKTYPE>(a_HeldItem.m_ItemType), Meta);
    }
};