276 lines
7.5 KiB
C++
276 lines
7.5 KiB
C++
#pragma once
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#include "BlockHandler.h"
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#include "../World.h"
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class cBlockTorchHandler :
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public cBlockHandler
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{
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public:
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cBlockTorchHandler(BLOCKTYPE a_BlockType)
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: cBlockHandler(a_BlockType)
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{
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}
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virtual bool GetPlacementBlockTypeMeta(
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cWorld * a_World, cPlayer * a_Player,
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int a_BlockX, int a_BlockY, int a_BlockZ, char 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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// Find proper placement of torch
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if ((a_BlockFace == BLOCK_FACE_TOP) || (a_BlockFace == BLOCK_FACE_BOTTOM))
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{
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a_BlockFace = FindSuitableFace(a_World, a_BlockX, a_BlockY, a_BlockZ); // Top or bottom faces clicked, find a suitable face
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if (a_BlockFace == BLOCK_FACE_NONE)
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{
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// Client wouldn't have sent anything anyway, but whatever
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return false;
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}
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}
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else
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{
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// Not top or bottom faces, try to preserve whatever face was clicked
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if (!TorchCanBePlacedAt(a_World, a_BlockX, a_BlockY, a_BlockZ, a_BlockFace))
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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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a_BlockFace = FindSuitableFace(a_World, a_BlockX, a_BlockY, a_BlockZ);
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if (a_BlockFace == BLOCK_FACE_NONE)
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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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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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static NIBBLETYPE DirectionToMetaData(char a_Direction) // tolua_export
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{ // tolua_export
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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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default:
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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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} // tolua_export
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static char MetaDataToDirection(NIBBLETYPE a_MetaData) // tolua_export
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{ // tolua_export
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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 0;
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} // tolua_export
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static bool IsAttachedTo(const Vector3i & a_TorchPos, char a_TorchMeta, const Vector3i & a_BlockPos)
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{
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switch (a_TorchMeta)
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{
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case 0x0:
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case E_META_TORCH_FLOOR: return ((a_TorchPos - a_BlockPos).Equals(Vector3i(0, 1, 0)));
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case E_META_TORCH_EAST: return ((a_TorchPos - a_BlockPos).Equals(Vector3i(0, 0, -1)));
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case E_META_TORCH_WEST: return ((a_TorchPos - a_BlockPos).Equals(Vector3i(0, 0, 1)));
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case E_META_TORCH_NORTH: return ((a_TorchPos - a_BlockPos).Equals(Vector3i(-1, 0, 0)));
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case E_META_TORCH_SOUTH: return ((a_TorchPos - a_BlockPos).Equals(Vector3i(1, 0, 0)));
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default:
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{
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ASSERT(!"Unhandled torch meta!");
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break;
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}
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}
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return false;
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}
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static bool CanBePlacedOn(BLOCKTYPE a_BlockType, char a_BlockFace)
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{
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if ( !g_BlockIsTorchPlaceable[a_BlockType] )
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{
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return (a_BlockFace == BLOCK_FACE_TOP); // Allow placement only when torch upright
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}
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else
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{
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return true;
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}
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}
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static bool TorchCanBePlacedAt(cWorld * a_World, int a_BlockX, int a_BlockY, int a_BlockZ, char a_BlockFace)
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{
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AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, a_BlockFace, true);
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return CanBePlacedOn(a_World->GetBlock(a_BlockX, a_BlockY, a_BlockZ), a_BlockFace);
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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 char FindSuitableFace(cWorld * a_World, int a_BlockX, int a_BlockY, int a_BlockZ)
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{
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for (int i = 0; i <= 5; i++)
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{
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AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, i, true);
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BLOCKTYPE BlockInQuestion = a_World->GetBlock(a_BlockX, a_BlockY, a_BlockZ);
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if (
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((BlockInQuestion == E_BLOCK_GLASS) ||
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(BlockInQuestion == E_BLOCK_FENCE) ||
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(BlockInQuestion == E_BLOCK_NETHER_BRICK_FENCE) ||
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(BlockInQuestion == E_BLOCK_COBBLESTONE_WALL)) &&
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(i == BLOCK_FACE_TOP)
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)
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{
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return i;
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}
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else if ((g_BlockIsTorchPlaceable[BlockInQuestion]) && (i != BLOCK_FACE_BOTTOM))
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{
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return i;
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}
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else
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{
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AddFaceDirection(a_BlockX, a_BlockY, a_BlockZ, i, 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(int a_RelX, int a_RelY, int a_RelZ, const cChunk & a_Chunk) override
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{
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char 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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a_Chunk.UnboundedRelGetBlockType(a_RelX, a_RelY, a_RelZ, BlockInQuestion);
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if (
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(BlockInQuestion == E_BLOCK_GLASS) ||
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(BlockInQuestion == E_BLOCK_FENCE) ||
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(BlockInQuestion == E_BLOCK_NETHER_BRICK_FENCE) ||
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(BlockInQuestion == E_BLOCK_COBBLESTONE_WALL)
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)
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{
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// Torches can be placed on tops of glass and fences, despite them being 'untorcheable'
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// No need to check for upright orientation, it was done when the torch was placed
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return true;
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}
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else if ( !g_BlockIsTorchPlaceable[BlockInQuestion] )
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{
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return false;
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}
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else
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{
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return true;
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}
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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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virtual const char * GetStepSound(void) override
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{
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return "step.wood";
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}
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virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override
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{
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// Bit 4 stays, the rest is swapped around according to a table:
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NIBBLETYPE TopBits = (a_Meta & 0x08);
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switch (a_Meta & 0x07)
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{
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case 0x01: return TopBits | 0x04; // East -> North
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case 0x02: return TopBits | 0x03; // West -> South
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case 0x03: return TopBits | 0x01; // South -> East
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case 0x04: return TopBits | 0x02; // North -> West
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default: return a_Meta; // Floor -> Floor
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}
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}
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virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override
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{
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// Bit 4 stays, the rest is swapped around according to a table:
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NIBBLETYPE TopBits = (a_Meta & 0x08);
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switch (a_Meta & 0x07)
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{
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case 0x01: return TopBits | 0x03; // East -> South
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case 0x02: return TopBits | 0x04; // West -> North
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case 0x03: return TopBits | 0x02; // South -> West
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case 0x04: return TopBits | 0x01; // North -> East
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default: return a_Meta; // Floor -> Floor
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}
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}
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virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override
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{
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// Bit 4 stays, the rest is swapped around according to a table:
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NIBBLETYPE TopBits = (a_Meta & 0x08);
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switch (a_Meta & 0x07)
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{
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case 0x03: return TopBits | 0x04; // South -> North
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case 0x04: return TopBits | 0x03; // North -> South
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default: return a_Meta; // Keep the rest
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}
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}
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// Mirroring around the XZ plane doesn't make sense for floor torches,
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// the others stay the same, so let's keep all the metas the same.
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// The base class does tht for us, no need to override MetaMirrorXZ()
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virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override
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{
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// Bit 4 stays, the rest is swapped around according to a table:
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NIBBLETYPE TopBits = (a_Meta & 0x08);
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switch (a_Meta & 0x07)
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{
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case 0x01: return TopBits | 0x02; // East -> West
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case 0x02: return TopBits | 0x01; // West -> East
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default: return a_Meta; // Keep the rest
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}
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}
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} ;
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