BlockLadder.h

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#pragma once

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





class cBlockLadderHandler :
    public cClearMetaOnDrop<cMetaRotator<cBlockHandler, 0x07, 0x02, 0x05, 0x03, 0x04> >
{
    using super = cClearMetaOnDrop<cMetaRotator<cBlockHandler, 0x07, 0x02, 0x05, 0x03, 0x04>>;

public:

    cBlockLadderHandler(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
    {
        if (!LadderCanBePlacedAt(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace))
        {
            a_BlockFace = FindSuitableBlockFace(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ);

            if (a_BlockFace == BLOCK_FACE_BOTTOM)
            {
                return false;
            }
        }

        a_BlockType = m_BlockType;
        a_BlockMeta = DirectionToMetaData(a_BlockFace);
        return true;
    }





    static NIBBLETYPE DirectionToMetaData(eBlockFace a_Direction)
    {
        switch (a_Direction)
        {
            case BLOCK_FACE_ZM: return 0x2;
            case BLOCK_FACE_ZP: return 0x3;
            case BLOCK_FACE_XM: return 0x4;
            case BLOCK_FACE_XP: return 0x5;
            case BLOCK_FACE_NONE:
            case BLOCK_FACE_YM:
            case BLOCK_FACE_YP:
            {
                return 0x2;
            }
        }
        UNREACHABLE("Unsupported block face");
    }





    static eBlockFace MetaDataToDirection(NIBBLETYPE a_MetaData)
    {
        switch (a_MetaData)
        {
            case 0x2: return BLOCK_FACE_ZM;
            case 0x3: return BLOCK_FACE_ZP;
            case 0x4: return BLOCK_FACE_XM;
            case 0x5: return BLOCK_FACE_XP;
            default:  return BLOCK_FACE_ZM;
        }
    }





    static eBlockFace FindSuitableBlockFace(cChunkInterface & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
    {
        for (int FaceInt = BLOCK_FACE_ZM; FaceInt <= BLOCK_FACE_XP; FaceInt++)
        {
            eBlockFace Face = static_cast<eBlockFace>(FaceInt);
            if (LadderCanBePlacedAt(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ, Face))
            {
                return Face;
            }
        }
        return BLOCK_FACE_BOTTOM;
    }





    static bool LadderCanBePlacedAt(cChunkInterface & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace)
    {
        if ((a_BlockFace == BLOCK_FACE_BOTTOM) || (a_BlockFace == BLOCK_FACE_TOP))
        {
            return false;
        }

        AddFaceDirection( a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, true);

        return cBlockInfo::IsSolid(a_ChunkInterface.GetBlock({a_BlockX, a_BlockY, a_BlockZ}));
    }





    virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
    {
        // TODO: Use AdjustCoordsByMeta(), then cChunk::UnboundedRelGetBlock() and finally some comparison
        eBlockFace BlockFace = MetaDataToDirection(a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ));
        int BlockX = a_RelX + a_Chunk.GetPosX() * cChunkDef::Width;
        int BlockZ = a_RelZ + a_Chunk.GetPosZ() * cChunkDef::Width;
        return LadderCanBePlacedAt(a_ChunkInterface, BlockX, a_RelY, BlockZ, BlockFace);
    }





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