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Diffstat (limited to 'src/Blocks/BlockTorch.h')
| -rw-r--r-- | src/Blocks/BlockTorch.h | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/src/Blocks/BlockTorch.h b/src/Blocks/BlockTorch.h new file mode 100644 index 000000000..9e543dfd7 --- /dev/null +++ b/src/Blocks/BlockTorch.h @@ -0,0 +1,251 @@ +#pragma once + +#include "BlockHandler.h" +#include "../World.h" + + + + + +class cBlockTorchHandler : + public cBlockHandler +{ +public: + cBlockTorchHandler(BLOCKTYPE a_BlockType) + : cBlockHandler(a_BlockType) + { + } + + + virtual bool GetPlacementBlockTypeMeta( + cWorld * a_World, cPlayer * a_Player, + int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace, + int a_CursorX, int a_CursorY, int a_CursorZ, + BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta + ) override + { + // Find proper placement of torch + + if ((a_BlockFace == BLOCK_FACE_TOP) || (a_BlockFace == BLOCK_FACE_BOTTOM)) + { + a_BlockFace = FindSuitableFace(a_World, a_BlockX, a_BlockY, a_BlockZ); // Top or bottom faces clicked, find a suitable face + if (a_BlockFace == BLOCK_FACE_NONE) + { + // Client wouldn't have sent anything anyway, but whatever + return false; + } + } + else + { + // Not top or bottom faces, try to preserve whatever face was clicked + AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, true); + if (!CanBePlacedOn(a_World->GetBlock(a_BlockX, a_BlockY, a_BlockZ), a_BlockFace)) + { + // Torch couldn't be placed on whatever face was clicked, last ditch resort - find another face + a_BlockFace = FindSuitableFace(a_World, a_BlockX, a_BlockY, a_BlockZ); + if (a_BlockFace == BLOCK_FACE_NONE) + { + return false; + } + } + } + + a_BlockType = m_BlockType; + a_BlockMeta = DirectionToMetaData(a_BlockFace); + return true; + } + + + inline static NIBBLETYPE DirectionToMetaData(char a_Direction) + { + switch (a_Direction) + { + case BLOCK_FACE_BOTTOM: ASSERT(!"Shouldn't be getting this face"); return 0; + case BLOCK_FACE_TOP: return E_META_TORCH_FLOOR; + case BLOCK_FACE_EAST: return E_META_TORCH_EAST; + case BLOCK_FACE_WEST: return E_META_TORCH_WEST; + case BLOCK_FACE_NORTH: return E_META_TORCH_NORTH; + case BLOCK_FACE_SOUTH: return E_META_TORCH_SOUTH; + default: + { + ASSERT(!"Unhandled torch direction!"); + break; + } + }; + return 0x0; + } + + + inline static char MetaDataToDirection(NIBBLETYPE a_MetaData) + { + switch (a_MetaData) + { + case 0: return BLOCK_FACE_TOP; // By default, the torches stand on the ground + case E_META_TORCH_FLOOR: return BLOCK_FACE_TOP; + case E_META_TORCH_EAST: return BLOCK_FACE_EAST; + case E_META_TORCH_WEST: return BLOCK_FACE_WEST; + case E_META_TORCH_NORTH: return BLOCK_FACE_NORTH; + case E_META_TORCH_SOUTH: return BLOCK_FACE_SOUTH; + default: + { + ASSERT(!"Unhandled torch metadata"); + break; + } + } + return 0; + } + + + static bool CanBePlacedOn(BLOCKTYPE a_BlockType, char a_BlockFace) + { + if ( !g_BlockIsTorchPlaceable[a_BlockType] ) + { + return (a_BlockFace == BLOCK_FACE_TOP); // Allow placement only when torch upright (for glass, etc.); exceptions won't even be sent by client, no need to handle + } + else + { + return true; + } + } + + + /// Finds a suitable face to place the torch, returning BLOCK_FACE_NONE on failure + static char FindSuitableFace(cWorld * a_World, int a_BlockX, int a_BlockY, int a_BlockZ) + { + for (int i = BLOCK_FACE_YM; i <= BLOCK_FACE_XP; i++) // Loop through all directions + { + AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, i, true); + BLOCKTYPE BlockInQuestion = a_World->GetBlock(a_BlockX, a_BlockY, a_BlockZ); + + if ( // If on a block that can only hold a torch if torch is standing on it, return that face + ((BlockInQuestion == E_BLOCK_GLASS) || + (BlockInQuestion == E_BLOCK_FENCE) || + (BlockInQuestion == E_BLOCK_NETHER_BRICK_FENCE) || + (BlockInQuestion == E_BLOCK_COBBLESTONE_WALL)) && + (i == BLOCK_FACE_TOP) + ) + { + return i; + } + else if ((g_BlockIsTorchPlaceable[BlockInQuestion]) && (i != BLOCK_FACE_BOTTOM)) + { + // Otherwise, if block in that direction is torch placeable and we haven't gotten to it via the bottom face, return that face + return i; + } + else + { + // Reset coords in preparation for next iteration + AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, i, false); + } + } + return BLOCK_FACE_NONE; + } + + + virtual bool CanBeAt(int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override + { + char Face = MetaDataToDirection(a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ)); + + AddFaceDirection(a_RelX, a_RelY, a_RelZ, Face, true); + BLOCKTYPE BlockInQuestion; + a_Chunk.UnboundedRelGetBlockType(a_RelX, a_RelY, a_RelZ, BlockInQuestion); + + if ( + (BlockInQuestion == E_BLOCK_GLASS) || + (BlockInQuestion == E_BLOCK_FENCE) || + (BlockInQuestion == E_BLOCK_NETHER_BRICK_FENCE) || + (BlockInQuestion == E_BLOCK_COBBLESTONE_WALL) + ) + { + // Torches can be placed on tops of glass and fences, despite them being 'untorcheable' + // No need to check for upright orientation, it was done when the torch was placed + return true; + } + else if ( !g_BlockIsTorchPlaceable[BlockInQuestion] ) + { + return false; + } + else + { + return true; + } + } + + + virtual void ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta) override + { + // Always drop meta = 0 + a_Pickups.push_back(cItem(m_BlockType, 1, 0)); + } + + + virtual const char * GetStepSound(void) override + { + return "step.wood"; + } + + + virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override + { + // Bit 4 stays, the rest is swapped around according to a table: + NIBBLETYPE TopBits = (a_Meta & 0x08); + switch (a_Meta & 0x07) + { + case 0x01: return TopBits | 0x04; // East -> North + case 0x02: return TopBits | 0x03; // West -> South + case 0x03: return TopBits | 0x01; // South -> East + case 0x04: return TopBits | 0x02; // North -> West + default: return a_Meta; // Floor -> Floor + } + } + + + virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override + { + // Bit 4 stays, the rest is swapped around according to a table: + NIBBLETYPE TopBits = (a_Meta & 0x08); + switch (a_Meta & 0x07) + { + case 0x01: return TopBits | 0x03; // East -> South + case 0x02: return TopBits | 0x04; // West -> North + case 0x03: return TopBits | 0x02; // South -> West + case 0x04: return TopBits | 0x01; // North -> East + default: return a_Meta; // Floor -> Floor + } + } + + + virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override + { + // Bit 4 stays, the rest is swapped around according to a table: + NIBBLETYPE TopBits = (a_Meta & 0x08); + switch (a_Meta & 0x07) + { + case 0x03: return TopBits | 0x04; // South -> North + case 0x04: return TopBits | 0x03; // North -> South + default: return a_Meta; // Keep the rest + } + } + + + // Mirroring around the XZ plane doesn't make sense for floor torches, + // the others stay the same, so let's keep all the metas the same. + // The base class does tht for us, no need to override MetaMirrorXZ() + + + virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override + { + // Bit 4 stays, the rest is swapped around according to a table: + NIBBLETYPE TopBits = (a_Meta & 0x08); + switch (a_Meta & 0x07) + { + case 0x01: return TopBits | 0x02; // East -> West + case 0x02: return TopBits | 0x01; // West -> East + default: return a_Meta; // Keep the rest + } + } +} ; + + + + |