ItemRedstoneDust.h

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#pragma once

#include "ItemHandler.h"





class cItemRedstoneDustHandler : public cItemHandler
{
public:
    cItemRedstoneDustHandler(int a_ItemType)
        : cItemHandler(a_ItemType)
    {
    }

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

    virtual bool GetPlacementBlockTypeMeta(
        cWorld * a_World, 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
    {
        // Check if coords are out of range:
        if ((a_BlockY <= 0) || (a_BlockY >= cChunkDef::Height))
        {
            return false;
        }

        // Check the block below, if it supports dust on top of it:
        BLOCKTYPE BlockType;
        NIBBLETYPE BlockMeta;
        if (!a_World->GetBlockTypeMeta(a_BlockX, a_BlockY - 1, a_BlockZ, BlockType, BlockMeta))
        {
            return false;
        }
        if (!IsBlockTypeUnderSuitable(BlockType, BlockMeta))
        {
            return false;
        }

        a_BlockType = E_BLOCK_REDSTONE_WIRE;
        a_BlockMeta = 0;
        return true;
    }


    static bool IsBlockTypeUnderSuitable(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
    {
        if (cBlockInfo::FullyOccupiesVoxel(a_BlockType))
        {
            return true;
        }

        switch (a_BlockType)
        {
            case E_BLOCK_RED_SANDSTONE_SLAB:
            case E_BLOCK_WOODEN_SLAB:
            case E_BLOCK_STONE_SLAB:
            {
                // Slabs can support redstone if they're upside down:
                return ((a_BlockMeta & 0x08) != 0);
            }
        }
        return false;
    }
} ;