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#pragma once
#include "BlockHandler.h"
#include "Mixins.h"
#include "../Item.h"
// fwd:
class cWorld;
class cBlockPistonHandler:
public cClearMetaOnDrop<cPitchYawRotator<cBlockHandler, 0x07, 0x03, 0x04, 0x02, 0x05, 0x01, 0x00>>
{
using Super = cClearMetaOnDrop<cPitchYawRotator<cBlockHandler, 0x07, 0x03, 0x04, 0x02, 0x05, 0x01, 0x00>>;
public:
using Super::Super;
static eBlockFace MetaDataToDirection(NIBBLETYPE a_MetaData)
{
switch (a_MetaData & 0x7) // We only want the bottom three bits (4th controls extended-ness))
{
case 0x0: return BLOCK_FACE_YM;
case 0x1: return BLOCK_FACE_YP;
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:
{
ASSERT(!"Invalid Metadata");
return BLOCK_FACE_NONE;
}
}
}
/** Converts piston block's metadata into a unit vector representing the direction in which the piston will extend. */
static Vector3i MetadataToOffset(NIBBLETYPE a_PistonMeta);
static void ExtendPiston(Vector3i a_BlockPos, cWorld & a_World);
static void RetractPiston(Vector3i a_BlockPos, cWorld & a_World);
/** Returns true if the piston (with the specified meta) is extended */
static inline bool IsExtended(NIBBLETYPE a_PistonMeta) { return ((a_PistonMeta & 0x8) != 0x0); }
private:
typedef std::unordered_set<Vector3i, VectorHasher<int>> Vector3iSet;
/** Piston extension block action */
static const Byte PistonExtendAction = 0U;
/** Piston retraction block action */
static const Byte PistonRetractAction = 1U;
/** Returns true if the piston (specified by blocktype) is a sticky piston */
static inline bool IsSticky(BLOCKTYPE a_BlockType) { return (a_BlockType == E_BLOCK_STICKY_PISTON); }
/** Returns true if the specified block can be pushed by a piston (and left intact) */
static inline bool CanPush(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
{
switch (a_BlockType)
{
case E_BLOCK_ANVIL:
case E_BLOCK_BARRIER:
case E_BLOCK_BEACON:
case E_BLOCK_BEDROCK:
case E_BLOCK_BREWING_STAND:
case E_BLOCK_CHAIN_COMMAND_BLOCK:
case E_BLOCK_CHEST:
case E_BLOCK_COMMAND_BLOCK:
case E_BLOCK_DAYLIGHT_SENSOR:
case E_BLOCK_DISPENSER:
case E_BLOCK_DROPPER:
case E_BLOCK_ENCHANTMENT_TABLE:
case E_BLOCK_END_GATEWAY:
case E_BLOCK_END_PORTAL:
case E_BLOCK_END_PORTAL_FRAME:
case E_BLOCK_ENDER_CHEST:
case E_BLOCK_FURNACE:
case E_BLOCK_LIT_FURNACE:
case E_BLOCK_INVERTED_DAYLIGHT_SENSOR:
case E_BLOCK_HOPPER:
case E_BLOCK_JUKEBOX:
case E_BLOCK_MOB_SPAWNER:
case E_BLOCK_NETHER_PORTAL:
case E_BLOCK_NOTE_BLOCK:
case E_BLOCK_OBSIDIAN:
case E_BLOCK_PISTON_EXTENSION:
case E_BLOCK_REPEATING_COMMAND_BLOCK:
case E_BLOCK_STANDING_BANNER:
case E_BLOCK_STRUCTURE_BLOCK:
case E_BLOCK_TRAPPED_CHEST:
case E_BLOCK_WALL_BANNER:
{
return false;
}
case E_BLOCK_STICKY_PISTON:
case E_BLOCK_PISTON:
{
// A piston can only be pushed if retracted:
return !IsExtended(a_BlockMeta);
}
}
return true;
}
/** Tries to push a block and increases the pushed blocks variable. Returns true if the block is pushable */
static bool CanPushBlock(
const Vector3i & a_BlockPos, cWorld & a_World, bool a_RequirePushable,
Vector3iSet & a_BlocksPushed, const Vector3i & a_PushDir
);
virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) const override
{
UNUSED(a_Meta);
return 11;
}
virtual void OnBroken(
cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface,
Vector3i a_BlockPos,
BLOCKTYPE a_OldBlockType, NIBBLETYPE a_OldBlockMeta
) const override;
/** Moves a list of blocks in a specific direction */
static void PushBlocks(const Vector3iSet & a_BlocksToPush,
cWorld & a_World, const Vector3i & a_PushDir
);
} ;
class cBlockPistonHeadHandler:
public cBlockHandler
{
using Super = cBlockHandler;
public:
constexpr cBlockPistonHeadHandler(void) :
Super(E_BLOCK_PISTON_EXTENSION)
{
}
virtual void OnBroken(
cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface,
Vector3i a_BlockPos,
BLOCKTYPE a_OldBlockType, NIBBLETYPE a_OldBlockMeta
) const override;
virtual cItems ConvertToPickups(NIBBLETYPE a_BlockMeta, cBlockEntity * a_BlockEntity, const cEntity * a_Digger, const cItem * a_Tool) const override;
} ;
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