BlockTripwireHook.h

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#pragma once

#include "BlockHandler.h"
#include "Mixins.h"





class cBlockTripwireHookHandler :
    public cMetaRotator<cClearMetaOnDrop<cBlockHandler>, 0x03, 0x02, 0x03, 0x00, 0x01>
{
    using super = cMetaRotator<cClearMetaOnDrop<cBlockHandler>, 0x03, 0x02, 0x03, 0x00, 0x01>;

public:

    cBlockTripwireHookHandler(BLOCKTYPE a_BlockType):
        super(a_BlockType)
    {
    }





    virtual bool GetPlacementBlockTypeMeta(
        cChunkInterface & a_ChunkInterface, cPlayer & a_Player,
        int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
        int a_CursorX, int a_CursorY, int a_CursorZ,
        BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
    ) override
    {
        a_BlockType = m_BlockType;
        a_BlockMeta = DirectionToMetadata(a_BlockFace);

        return true;
    }





    inline static NIBBLETYPE DirectionToMetadata(eBlockFace a_Direction)
    {
        switch (a_Direction)
        {
            case BLOCK_FACE_XM: return 0x1;
            case BLOCK_FACE_XP: return 0x3;
            case BLOCK_FACE_ZM: return 0x2;
            case BLOCK_FACE_ZP: return 0x0;
            case BLOCK_FACE_NONE:
            case BLOCK_FACE_YM:
            case BLOCK_FACE_YP:
            {
                ASSERT(!"Unhandled tripwire hook direction!");
                return 0x0;
            }
        }
        UNREACHABLE("Unsupported block face");
    }





    inline static eBlockFace MetadataToDirection(NIBBLETYPE a_Meta)
    {
        switch (a_Meta & 0x03)
        {
            case 0x1: return BLOCK_FACE_XM;
            case 0x3: return BLOCK_FACE_XP;
            case 0x2: return BLOCK_FACE_ZM;
            case 0x0: return BLOCK_FACE_ZP;
            default: ASSERT(!"Unhandled tripwire hook metadata!"); return BLOCK_FACE_NONE;
        }
    }





    virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
    {
        NIBBLETYPE Meta;
        a_Chunk.UnboundedRelGetBlockMeta(a_RelX, a_RelY, a_RelZ, Meta);

        AddFaceDirection(a_RelX, a_RelY, a_RelZ, MetadataToDirection(Meta), true);
        BLOCKTYPE BlockIsOn;
        a_Chunk.UnboundedRelGetBlockType(a_RelX, a_RelY, a_RelZ, BlockIsOn);

        return ((a_RelY > 0) && cBlockInfo::FullyOccupiesVoxel(BlockIsOn));
    }





    virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) override
    {
        UNUSED(a_Meta);
        return 0;
    }
};