186 lines
5.2 KiB
C++
186 lines
5.2 KiB
C++
#pragma once
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#include "BlockHandler.h"
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#include "../Chunk.h"
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#include "ChunkInterface.h"
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#include "MetaRotator.h"
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class cBlockTorchHandler :
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public cMetaRotator<cBlockHandler, 0x7, 0x4, 0x1, 0x3, 0x2>
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{
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public:
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cBlockTorchHandler(BLOCKTYPE a_BlockType)
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: cMetaRotator<cBlockHandler, 0x7, 0x4, 0x1, 0x3, 0x2>(a_BlockType)
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{
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}
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virtual bool GetPlacementBlockTypeMeta(
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cChunkInterface & a_ChunkInterface, cPlayer * a_Player,
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int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
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int a_CursorX, int a_CursorY, int a_CursorZ,
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BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
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) override
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{
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BLOCKTYPE Block;
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NIBBLETYPE Meta;
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AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, true); // Set to clicked block
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a_ChunkInterface.GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, Block, Meta);
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if (!CanBePlacedOn(Block, Meta, a_BlockFace)) // Try to preserve original direction
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{
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// Torch couldn't be placed on whatever face was clicked, last ditch resort - find another face
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AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, false); // Reset to torch block
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a_BlockFace = FindSuitableFace(a_ChunkInterface, a_BlockX, a_BlockY, a_BlockZ); // Set a_BlockFace to a valid direction which will be converted later to a metadata
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if (a_BlockFace == BLOCK_FACE_NONE)
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{
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// No attachable face found - don't place the torch
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return false;
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}
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}
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a_BlockType = m_BlockType;
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a_BlockMeta = DirectionToMetaData(a_BlockFace);
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return true;
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}
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inline static NIBBLETYPE DirectionToMetaData(eBlockFace a_Direction)
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{
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switch (a_Direction)
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{
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case BLOCK_FACE_BOTTOM: ASSERT(!"Shouldn't be getting this face"); return 0;
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case BLOCK_FACE_TOP: return E_META_TORCH_FLOOR;
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case BLOCK_FACE_EAST: return E_META_TORCH_EAST;
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case BLOCK_FACE_WEST: return E_META_TORCH_WEST;
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case BLOCK_FACE_NORTH: return E_META_TORCH_NORTH;
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case BLOCK_FACE_SOUTH: return E_META_TORCH_SOUTH;
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case BLOCK_FACE_NONE:
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{
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ASSERT(!"Unhandled torch direction!");
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break;
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}
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};
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return 0x0;
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}
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inline static eBlockFace MetaDataToDirection(NIBBLETYPE a_MetaData)
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{
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switch (a_MetaData)
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{
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case 0: return BLOCK_FACE_TOP; // By default, the torches stand on the ground
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case E_META_TORCH_FLOOR: return BLOCK_FACE_TOP;
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case E_META_TORCH_EAST: return BLOCK_FACE_EAST;
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case E_META_TORCH_WEST: return BLOCK_FACE_WEST;
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case E_META_TORCH_NORTH: return BLOCK_FACE_NORTH;
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case E_META_TORCH_SOUTH: return BLOCK_FACE_SOUTH;
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default:
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{
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ASSERT(!"Unhandled torch metadata");
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break;
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}
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}
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return BLOCK_FACE_TOP;
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}
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static bool CanBePlacedOn(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta, eBlockFace a_BlockFace)
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{
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switch (a_BlockType)
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{
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case E_BLOCK_END_PORTAL_FRAME:
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case E_BLOCK_SOULSAND:
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{
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// Exceptional vanilla behaviour
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return true;
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}
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case E_BLOCK_GLASS:
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case E_BLOCK_STAINED_GLASS:
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case E_BLOCK_FENCE:
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case E_BLOCK_NETHER_BRICK_FENCE:
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case E_BLOCK_SPRUCE_FENCE:
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case E_BLOCK_BIRCH_FENCE:
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case E_BLOCK_JUNGLE_FENCE:
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case E_BLOCK_DARK_OAK_FENCE:
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case E_BLOCK_ACACIA_FENCE:
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case E_BLOCK_COBBLESTONE_WALL:
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{
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// Torches can only be placed on top of these blocks
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return (a_BlockFace == BLOCK_FACE_YP);
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}
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case E_BLOCK_STONE_SLAB:
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case E_BLOCK_WOODEN_SLAB:
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{
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// Toches can be placed on the top of these slabs only if the occupy the top half of the voxel
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return ((a_BlockFace == BLOCK_FACE_YP) && ((a_BlockMeta & 0x08) == 0x08));
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}
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default:
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{
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if (cBlockInfo::FullyOccupiesVoxel(a_BlockType))
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{
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// Torches can be placed on all sides of full blocks except the bottom
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return (a_BlockFace != BLOCK_FACE_YM);
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}
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return false;
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}
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}
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}
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/** Finds a suitable face to place the torch, returning BLOCK_FACE_NONE on failure */
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static eBlockFace FindSuitableFace(cChunkInterface & a_ChunkInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
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{
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for (int i = BLOCK_FACE_YM; i <= BLOCK_FACE_XP; i++) // Loop through all directions
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{
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eBlockFace Face = static_cast<eBlockFace>(i);
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AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, Face, true);
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BLOCKTYPE BlockInQuestion;
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NIBBLETYPE BlockInQuestionMeta;
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a_ChunkInterface.GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, BlockInQuestion, BlockInQuestionMeta);
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if (CanBePlacedOn(BlockInQuestion, BlockInQuestionMeta, Face))
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{
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return Face;
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}
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else
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{
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// Reset coords in preparation for next iteration
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AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, Face, false);
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}
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}
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return BLOCK_FACE_NONE;
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}
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virtual bool CanBeAt(cChunkInterface & a_ChunkInterface, int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
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{
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eBlockFace Face = MetaDataToDirection(a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ));
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AddFaceDirection(a_RelX, a_RelY, a_RelZ, Face, true);
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BLOCKTYPE BlockInQuestion;
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NIBBLETYPE BlockInQuestionMeta;
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if (!a_Chunk.UnboundedRelGetBlock(a_RelX, a_RelY, a_RelZ, BlockInQuestion, BlockInQuestionMeta))
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{
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return false;
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}
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return CanBePlacedOn(BlockInQuestion, BlockInQuestionMeta, Face);
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}
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virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override
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{
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// Always drop meta = 0
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a_Pickups.push_back(cItem(m_BlockType, 1, 0));
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}
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} ;
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