BlockLever.h

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#pragma once
 
#include "BlockHandler.h"
#include "../Chunk.h"
#include "Blocks/BlockStairs.h"
#include "ChunkDef.h"
#include "Defines.h"
#include "Mixins.h"
#include "BlockSlab.h"
 
 
class cBlockLeverHandler final :
    public cMetaRotator<cBlockHandler, 0x07, 0x04, 0x01, 0x03, 0x02, false>
{
    using Super = cMetaRotator<cBlockHandler, 0x07, 0x04, 0x01, 0x03, 0x02, false>;
 
public:
 
    using Super::Super;
 
    static bool IsLeverOn(NIBBLETYPE a_BlockMeta)
    {
        return ((a_BlockMeta & 0x8) == 0x8);
    }
 
private:
 
    virtual bool OnUse(
        cChunkInterface & a_ChunkInterface,
        cWorldInterface & a_WorldInterface,
        cPlayer & a_Player,
        const Vector3i a_BlockPos,
        eBlockFace a_BlockFace,
        const Vector3i a_CursorPos
    ) const override
    {
        // Flip the ON bit on / off using the XOR bitwise operation
        NIBBLETYPE Meta = (a_ChunkInterface.GetBlockMeta(a_BlockPos) ^ 0x08);
 
        a_ChunkInterface.SetBlockMeta(a_BlockPos, Meta);
        a_WorldInterface.WakeUpSimulators(a_BlockPos);
        a_WorldInterface.GetBroadcastManager().BroadcastSoundEffect("block.lever.click", a_BlockPos, 0.5f, (Meta & 0x08) ? 0.6f : 0.5f);
        return true;
    }
 
 
 
 
 
    virtual cItems ConvertToPickups(const NIBBLETYPE a_BlockMeta, const cItem * const a_Tool) const override
    {
        // Reset meta to zero:
        return cItem(E_BLOCK_LEVER, 1, 0);
    }
 
 
 
 
 
    virtual bool IsUseable(void) const override
    {
        return true;
    }
 
 
 
 
 
    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(const cChunk & a_Chunk, const Vector3i a_Position, const NIBBLETYPE a_Meta) const override
    {
        // Find the type of block the lever is attached to:
        auto NeighborFace = BlockMetaDataToBlockFace(a_Meta);
        auto NeighborPos = AddFaceDirection(a_Position, NeighborFace, true);
        if (!cChunkDef::IsValidHeight(NeighborPos))
        {
            return false;
        }
        BLOCKTYPE NeighborBlockType;
        NIBBLETYPE NeighborMeta;
        if (!a_Chunk.UnboundedRelGetBlock(NeighborPos, NeighborBlockType, NeighborMeta))
        {
            return false;
        }
 
        // Allow any full block or the "good" side of a half-slab:
        if (cBlockInfo::FullyOccupiesVoxel(NeighborBlockType))
        {
            return true;
        }
        else if (cBlockSlabHandler::IsAnySlabType(NeighborBlockType))
        {
            return (
                (((NeighborMeta & 0x08) == 0x08) && (NeighborFace == BLOCK_FACE_TOP)) ||
                (((NeighborMeta & 0x08) == 0)    && (NeighborFace == BLOCK_FACE_BOTTOM))
            );
        }
        else if (cBlockStairsHandler::IsAnyStairType(NeighborBlockType))
        {
            switch (NeighborFace)
            {
                case eBlockFace::BLOCK_FACE_YM:
                    return !(NeighborMeta & E_BLOCK_STAIRS_UPSIDE_DOWN);
                case eBlockFace::BLOCK_FACE_YP:
                    return (NeighborMeta & E_BLOCK_STAIRS_UPSIDE_DOWN);
                case eBlockFace::BLOCK_FACE_XP:
                    return ((NeighborMeta & 0b11) == E_BLOCK_STAIRS_XP);
                case eBlockFace::BLOCK_FACE_XM:
                    return ((NeighborMeta & 0b11) == E_BLOCK_STAIRS_XM);
                case eBlockFace::BLOCK_FACE_ZP:
                    return ((NeighborMeta & 0b11) == E_BLOCK_STAIRS_ZP);
                case eBlockFace::BLOCK_FACE_ZM:
                    return ((NeighborMeta & 0b11) == E_BLOCK_STAIRS_ZM);
                default:
                {
                    return false;
                }
            }
        }
        return false;
    }
 
 
 
 
 
    virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) const 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) const 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) const override
    {
        UNUSED(a_Meta);
        return 0;
    }
} ;