164 lines
4.3 KiB
C++
164 lines
4.3 KiB
C++
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#pragma once
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#include "BlockHandler.h"
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#include "Mixins.h"
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#include "../Item.h"
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// fwd:
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class cWorld;
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class cBlockPistonHandler:
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public cClearMetaOnDrop<cPitchYawRotator<cBlockHandler, 0x07, 0x03, 0x04, 0x02, 0x05, 0x01, 0x00>>
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{
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using Super = cClearMetaOnDrop<cPitchYawRotator<cBlockHandler, 0x07, 0x03, 0x04, 0x02, 0x05, 0x01, 0x00>>;
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public:
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using Super::Super;
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static eBlockFace MetaDataToDirection(NIBBLETYPE a_MetaData)
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{
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switch (a_MetaData & 0x7) // We only want the bottom three bits (4th controls extended-ness))
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{
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case 0x0: return BLOCK_FACE_YM;
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case 0x1: return BLOCK_FACE_YP;
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case 0x2: return BLOCK_FACE_ZM;
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case 0x3: return BLOCK_FACE_ZP;
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case 0x4: return BLOCK_FACE_XM;
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case 0x5: return BLOCK_FACE_XP;
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default:
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{
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ASSERT(!"Invalid Metadata");
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return BLOCK_FACE_NONE;
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}
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}
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}
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/** Converts piston block's metadata into a unit vector representing the direction in which the piston will extend. */
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static Vector3i MetadataToOffset(NIBBLETYPE a_PistonMeta);
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static void ExtendPiston(Vector3i a_BlockPos, cWorld & a_World);
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static void RetractPiston(Vector3i a_BlockPos, cWorld & a_World);
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/** Returns true if the piston (with the specified meta) is extended */
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static inline bool IsExtended(NIBBLETYPE a_PistonMeta) { return ((a_PistonMeta & 0x8) != 0x0); }
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private:
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typedef std::unordered_set<Vector3i, VectorHasher<int>> Vector3iSet;
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/** Piston extension block action */
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static const Byte PistonExtendAction = 0U;
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/** Piston retraction block action */
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static const Byte PistonRetractAction = 1U;
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/** Returns true if the piston (specified by blocktype) is a sticky piston */
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static inline bool IsSticky(BLOCKTYPE a_BlockType) { return (a_BlockType == E_BLOCK_STICKY_PISTON); }
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/** Returns true if the specified block can be pushed by a piston (and left intact) */
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static inline bool CanPush(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
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{
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switch (a_BlockType)
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{
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case E_BLOCK_ANVIL:
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case E_BLOCK_BARRIER:
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case E_BLOCK_BEACON:
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case E_BLOCK_BEDROCK:
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case E_BLOCK_BREWING_STAND:
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case E_BLOCK_CHAIN_COMMAND_BLOCK:
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case E_BLOCK_CHEST:
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case E_BLOCK_COMMAND_BLOCK:
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case E_BLOCK_DAYLIGHT_SENSOR:
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case E_BLOCK_DISPENSER:
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case E_BLOCK_DROPPER:
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case E_BLOCK_ENCHANTMENT_TABLE:
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case E_BLOCK_END_GATEWAY:
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case E_BLOCK_END_PORTAL:
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case E_BLOCK_END_PORTAL_FRAME:
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case E_BLOCK_ENDER_CHEST:
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case E_BLOCK_FURNACE:
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case E_BLOCK_LIT_FURNACE:
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case E_BLOCK_INVERTED_DAYLIGHT_SENSOR:
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case E_BLOCK_HOPPER:
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case E_BLOCK_JUKEBOX:
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case E_BLOCK_MOB_SPAWNER:
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case E_BLOCK_NETHER_PORTAL:
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case E_BLOCK_NOTE_BLOCK:
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case E_BLOCK_OBSIDIAN:
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case E_BLOCK_PISTON_EXTENSION:
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case E_BLOCK_REPEATING_COMMAND_BLOCK:
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case E_BLOCK_STANDING_BANNER:
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case E_BLOCK_STRUCTURE_BLOCK:
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case E_BLOCK_TRAPPED_CHEST:
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case E_BLOCK_WALL_BANNER:
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{
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return false;
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}
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case E_BLOCK_STICKY_PISTON:
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case E_BLOCK_PISTON:
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{
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// A piston can only be pushed if retracted:
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return !IsExtended(a_BlockMeta);
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}
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}
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return true;
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}
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/** Tries to push a block and increases the pushed blocks variable. Returns true if the block is pushable */
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static bool CanPushBlock(
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const Vector3i & a_BlockPos, cWorld & a_World, bool a_RequirePushable,
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Vector3iSet & a_BlocksPushed, const Vector3i & a_PushDir
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);
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virtual ColourID GetMapBaseColourID(NIBBLETYPE a_Meta) const override
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{
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UNUSED(a_Meta);
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return 11;
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}
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virtual void OnBroken(
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cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface,
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Vector3i a_BlockPos,
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BLOCKTYPE a_OldBlockType, NIBBLETYPE a_OldBlockMeta
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) const override;
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/** Moves a list of blocks in a specific direction */
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static void PushBlocks(const Vector3iSet & a_BlocksToPush,
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cWorld & a_World, const Vector3i & a_PushDir
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);
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} ;
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class cBlockPistonHeadHandler:
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public cBlockHandler
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{
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using Super = cBlockHandler;
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public:
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constexpr cBlockPistonHeadHandler(void) :
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Super(E_BLOCK_PISTON_EXTENSION)
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{
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}
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virtual void OnBroken(
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cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface,
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Vector3i a_BlockPos,
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BLOCKTYPE a_OldBlockType, NIBBLETYPE a_OldBlockMeta
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) const override;
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virtual cItems ConvertToPickups(NIBBLETYPE a_BlockMeta, cBlockEntity * a_BlockEntity, const cEntity * a_Digger, const cItem * a_Tool) const override;
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} ;
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