BlockBigFlower.h

Go to the documentation of this file.

 
#pragma once
 
#include "BlockHandler.h"
#include "ChunkInterface.h"
#include "../BlockInfo.h"
#include "../Items/ItemHandler.h"
 
 
 
 
class cBlockBigFlowerHandler final :
    public cBlockHandler
{
    using Super = cBlockHandler;
 
public:
 
    using Super::Super;
 
private:
 
    virtual bool DoesIgnoreBuildCollision(const cWorld & a_World, const cItem & a_HeldItem, const Vector3i a_Position, NIBBLETYPE a_Meta, const eBlockFace a_ClickedBlockFace, const bool a_ClickedDirectly) const override
    {
        if (IsMetaTopPart(a_Meta))
        {
            BLOCKTYPE BottomType;
            if (
                (a_Position.y < 1) ||
                !a_World.GetBlockTypeMeta(a_Position - Vector3i(0, 1, 0), BottomType, a_Meta) ||
                (BottomType != E_BLOCK_BIG_FLOWER)
            )
            {
                // Can't find the flower meta so assume grass
                return true;
            }
        }
 
        NIBBLETYPE FlowerMeta = a_Meta & 0x07;
        return (
            (FlowerMeta == E_META_BIG_FLOWER_DOUBLE_TALL_GRASS) ||
            (FlowerMeta == E_META_BIG_FLOWER_LARGE_FERN)
        );
    }
 
 
 
 
 
    virtual cItems ConvertToPickups(const NIBBLETYPE a_BlockMeta, const cItem * const a_Tool) const override
    {
        if (IsMetaTopPart(a_BlockMeta))
        {
            return {};
        }
 
        // With shears, drop self (even tall grass and fern):
        if ((a_Tool != nullptr) && (a_Tool->m_ItemType == E_ITEM_SHEARS))
        {
            // Bit 0x08 specifies whether this is a top part or bottom; cut it off from the pickup:
            return cItem(m_BlockType, 1, a_BlockMeta & 0x07);
        }
 
        // Tall grass drops seeds, large fern drops nothing, others drop self:
        auto flowerType = a_BlockMeta & 0x07;
        if (flowerType == E_META_BIG_FLOWER_DOUBLE_TALL_GRASS)
        {
 
            // Drop seeds, depending on bernoulli trial result:
            if (GetRandomProvider().RandBool(0.875))
            {
                // 87.5% chance of dropping nothing:
                return {};
            }
 
            // 12.5% chance of dropping some seeds.
            const auto DropNum = FortuneDiscreteRandom(1, 1, 2 * ToolFortuneLevel(a_Tool));
            return cItem(E_ITEM_SEEDS, DropNum);
        }
        else if (flowerType != E_META_BIG_FLOWER_LARGE_FERN)
        {
            return cItem(m_BlockType, 1, static_cast<short>(flowerType));
        }
 
        return {};
    }
 
 
 
 
 
    static bool IsMetaTopPart(NIBBLETYPE a_Meta)
    {
        return ((a_Meta & 0x08) != 0);
    }
 
 
 
 
 
    virtual bool CanBeAt(const cChunk & a_Chunk, const Vector3i a_Position, const NIBBLETYPE a_Meta) const override
    {
        // CanBeAt is also called on placement, so the top part can't check for the bottom part.
        // Both parts can only that they're rooted in grass.
 
        const auto RootPosition = a_Position.addedY(IsMetaTopPart(a_Meta) ? -2 : -1);
        return (RootPosition.y >= 0) && IsBlockTypeOfDirt(a_Chunk.GetBlock(RootPosition));
    }
 
 
 
 
 
    virtual void OnBroken(
        cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface,
        const Vector3i a_BlockPos,
        BLOCKTYPE a_OldBlockType, NIBBLETYPE a_OldBlockMeta,
        const cEntity * a_Digger
    ) const override
    {
        if (IsMetaTopPart(a_OldBlockMeta))
        {
            const auto LowerPart = a_BlockPos.addedY(-1);
            if (a_ChunkInterface.GetBlock(LowerPart) == a_OldBlockType)
            {
                // Prevent creative punches from dropping pickups.
                // TODO: Simplify to SetBlock and remove the IsMetaTopPart check in DropBlockAsPickups when 1.13 blockstates arrive.
                if ((a_Digger != nullptr) && a_Digger->IsPlayer() && static_cast<const cPlayer *>(a_Digger)->IsGameModeCreative())
                {
                    a_ChunkInterface.SetBlock(LowerPart, E_BLOCK_AIR, 0);
                }
                else
                {
                    a_ChunkInterface.DropBlockAsPickups(LowerPart);
                }
            }
        }
        else
        {
            const auto UpperPart = a_BlockPos.addedY(1);
            if (a_ChunkInterface.GetBlock(UpperPart) == a_OldBlockType)
            {
                a_ChunkInterface.SetBlock(UpperPart, E_BLOCK_AIR, 0);
            }
        }
    }
 
 
 
 
 
    virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) const override
    {
        UNUSED(a_Meta);
        return 7;
    }
} ;