BlockLever.h

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#pragma once

#include "BlockHandler.h"
#include "../Chunk.h"
#include "Mixins.h"
#include "BlockSlab.h"


class cBlockLeverHandler :
    public cMetaRotator<cBlockHandler, 0x07, 0x04, 0x01, 0x03, 0x02, false>
{
    using super = cMetaRotator<cBlockHandler, 0x07, 0x04, 0x01, 0x03, 0x02, false>;

public:

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





    virtual bool OnUse(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer & a_Player, int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace, int a_CursorX, int a_CursorY, int a_CursorZ) override
    {
        Vector3i Coords(a_BlockX, a_BlockY, a_BlockZ);
        // Flip the ON bit on / off using the XOR bitwise operation
        NIBBLETYPE Meta = (a_ChunkInterface.GetBlockMeta(Coords) ^ 0x08);

        a_ChunkInterface.SetBlockMeta(Coords.x, Coords.y, Coords.z, Meta);
        a_WorldInterface.WakeUpSimulators(Coords);
        a_WorldInterface.GetBroadcastManager().BroadcastSoundEffect("block.lever.click", Vector3d(Coords), 0.5f, (Meta & 0x08) ? 0.6f : 0.5f);
        return true;
    }





    virtual cItems ConvertToPickups(NIBBLETYPE a_BlockMeta, cBlockEntity * a_BlockEntity, const cEntity * a_Digger, const cItem * a_Tool) override
    {
        // Reset meta to zero:
        return cItem(E_BLOCK_LEVER, 1, 0);
    }





    virtual bool IsUseable(void) override
    {
        return true;
    }





    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 = LeverDirectionToMetaData(a_BlockFace);
        return true;
    }





    inline static NIBBLETYPE LeverDirectionToMetaData(eBlockFace a_Dir)
    {
        // Determine lever direction:
        switch (a_Dir)
        {
            case BLOCK_FACE_YP:   return 0x6;
            case BLOCK_FACE_XP:   return 0x1;
            case BLOCK_FACE_XM:   return 0x2;
            case BLOCK_FACE_ZP:   return 0x3;
            case BLOCK_FACE_ZM:   return 0x4;
            case BLOCK_FACE_YM:   return 0x0;
            case BLOCK_FACE_NONE: return 0x6;
        }
        UNREACHABLE("Unsupported block face");
    }





    inline static eBlockFace BlockMetaDataToBlockFace(NIBBLETYPE a_Meta)
    {
        switch (a_Meta & 0x7)
        {
            case 0x1: return BLOCK_FACE_XP;
            case 0x2: return BLOCK_FACE_XM;
            case 0x3: return BLOCK_FACE_ZP;
            case 0x4: return BLOCK_FACE_ZM;
            case 0x5:
            case 0x6: return BLOCK_FACE_YP;
            case 0x7:
            case 0x0: return BLOCK_FACE_YM;
            default:
            {
                ASSERT(!"Unhandled block meta!");
                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.GetMeta(a_RelX, a_RelY, a_RelZ);

        eBlockFace Face = BlockMetaDataToBlockFace(Meta);

        AddFaceDirection(a_RelX, a_RelY, a_RelZ, Face, true);

        if ((a_RelY < 0) || (a_RelY >= cChunkDef::Height -1))
        {
            return false;
        }

        BLOCKTYPE BlockIsOn;
        a_Chunk.UnboundedRelGetBlock(a_RelX, a_RelY, a_RelZ, BlockIsOn, Meta);


        if (cBlockInfo::FullyOccupiesVoxel(BlockIsOn))
        {
            return true;
        }
        else if (cBlockSlabHandler::IsAnySlabType(BlockIsOn))
        {
            // Check if the slab is turned up side down
            if (((Meta & 0x08) == 0x08) && (Face == BLOCK_FACE_TOP))
            {
                return true;
            }
        }

        return false;
    }





    virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override
    {
        switch (a_Meta)
        {
            case 0x00: return 0x07;  // Ceiling rotation
            case 0x07: return 0x00;

            case 0x05: return 0x06;  // Ground rotation
            case 0x06: return 0x05;

            default:  return super::MetaRotateCCW(a_Meta);  // Wall Rotation
        }
    }





    virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override
    {
        switch (a_Meta)
        {
            case 0x00: return 0x07;  // Ceiling rotation
            case 0x07: return 0x00;

            case 0x05: return 0x06;  // Ground rotation
            case 0x06: return 0x05;

            default:  return super::MetaRotateCW(a_Meta);  // Wall Rotation
        }
    }





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





    static bool IsLeverOn(NIBBLETYPE a_BlockMeta)
    {
        return ((a_BlockMeta & 0x8) == 0x8);
    }
} ;