diff options
Diffstat (limited to 'src/Blocks/BlockVine.h')
| -rw-r--r-- | src/Blocks/BlockVine.h | 201 |
1 files changed, 201 insertions, 0 deletions
diff --git a/src/Blocks/BlockVine.h b/src/Blocks/BlockVine.h new file mode 100644 index 000000000..2c9f67cab --- /dev/null +++ b/src/Blocks/BlockVine.h @@ -0,0 +1,201 @@ + +#pragma once + +#include "BlockHandler.h" + + + + + +class cBlockVineHandler : + public cBlockHandler +{ +public: + cBlockVineHandler(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 + { + // TODO: Disallow placement where the vine doesn't attach to something properly + BLOCKTYPE BlockType = 0; + NIBBLETYPE BlockMeta; + a_World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, BlockType, BlockMeta); + if (BlockType == m_BlockType) + { + a_BlockMeta = BlockMeta | DirectionToMetaData(a_BlockFace); + } + else + { + a_BlockMeta = DirectionToMetaData(a_BlockFace); + } + a_BlockType = m_BlockType; + return true; + } + + + static NIBBLETYPE DirectionToMetaData(char a_BlockFace) + { + switch (a_BlockFace) + { + case BLOCK_FACE_NORTH: return 0x1; + case BLOCK_FACE_SOUTH: return 0x4; + case BLOCK_FACE_WEST: return 0x8; + case BLOCK_FACE_EAST: return 0x2; + default: return 0x0; + } + } + + + static char MetaDataToDirection(NIBBLETYPE a_MetaData) + { + switch(a_MetaData) + { + case 0x1: return BLOCK_FACE_NORTH; + case 0x4: return BLOCK_FACE_SOUTH; + case 0x8: return BLOCK_FACE_WEST; + case 0x2: return BLOCK_FACE_EAST; + default: return BLOCK_FACE_TOP; + } + } + + + /// Returns true if the specified block type is good for vines to attach to + static bool IsBlockAttachable(BLOCKTYPE a_BlockType) + { + return (a_BlockType == E_BLOCK_LEAVES) || g_BlockIsSolid[a_BlockType]; + } + + + /// Returns the meta that has the maximum allowable sides of the vine, given the surroundings + NIBBLETYPE GetMaxMeta(cChunk & a_Chunk, int a_RelX, int a_RelY, int a_RelZ) + { + static const struct + { + int x, z; + int Bit; + } Coords[] = + { + { 0, 1, 1}, // south, ZP + {-1, 0, 2}, // west, XM + { 0, -1, 4}, // north, ZM + { 1, 0, 8}, // east, XP + } ; + int res = 0; + for (int i = 0; i < ARRAYCOUNT(Coords); i++) + { + BLOCKTYPE BlockType; + NIBBLETYPE BlockMeta; + if ( + a_Chunk.UnboundedRelGetBlock(a_RelX + Coords[i].x, a_RelY, a_RelZ + Coords[i].z, BlockType, BlockMeta) && + IsBlockAttachable(BlockType) + ) + { + res |= Coords[i].Bit; + } + } + return res; + } + + + void Check(int a_RelX, int a_RelY, int a_RelZ, cChunk & a_Chunk) override + { + NIBBLETYPE CurMeta = a_Chunk.GetMeta(a_RelX, a_RelY, a_RelZ); + NIBBLETYPE MaxMeta = GetMaxMeta(a_Chunk, a_RelX, a_RelY, a_RelZ); + + // Check if vine above us, add its meta to MaxMeta + if ((a_RelY < cChunkDef::Height - 1) && (a_Chunk.GetBlock(a_RelX, a_RelY + 1, a_RelZ) == m_BlockType)) + { + MaxMeta |= a_Chunk.GetMeta(a_RelX, a_RelY + 1, a_RelZ); + } + + NIBBLETYPE Common = CurMeta & MaxMeta; // Neighbors that we have and are legal + if (Common != CurMeta) + { + // There is a neighbor missing, need to update the meta or even destroy the block + bool HasTop = (a_RelY < cChunkDef::Height - 1) && IsBlockAttachable(a_Chunk.GetBlock(a_RelX, a_RelY + 1, a_RelZ)); + if ((Common == 0) && !HasTop) + { + // The vine just lost all its support, destroy the block: + if (DoesDropOnUnsuitable()) + { + int BlockX = a_RelX + a_Chunk.GetPosX() * cChunkDef::Width; + int BlockZ = a_RelZ + a_Chunk.GetPosZ() * cChunkDef::Width; + DropBlock(a_Chunk.GetWorld(), NULL, BlockX, a_RelY, BlockZ); + } + a_Chunk.SetBlock(a_RelX, a_RelY, a_RelZ, E_BLOCK_AIR, 0); + return; + } + a_Chunk.SetBlock(a_RelX, a_RelY, a_RelZ, m_BlockType, Common); + } + else + { + // Wake up the simulators for this block: + int BlockX = a_RelX + a_Chunk.GetPosX() * cChunkDef::Width; + int BlockZ = a_RelZ + a_Chunk.GetPosZ() * cChunkDef::Width; + a_Chunk.GetWorld()->GetSimulatorManager()->WakeUp(BlockX, a_RelY, BlockZ, &a_Chunk); + } + } + + + virtual bool DoesIgnoreBuildCollision(void) override + { + return true; + } + + + virtual const char * GetStepSound(void) override + { + return "step.grass"; + } + + + virtual bool DoesDropOnUnsuitable(void) override + { + return false; + } + + virtual void OnUpdate(cWorld * a_World, int X, int Y, int Z) + { + if (a_World->GetBlock(X, Y - 1, Z) == E_BLOCK_AIR) + { + a_World->SetBlock(X, Y - 1, Z, E_BLOCK_VINES, a_World->GetBlockMeta(X, Y, Z)); + } + } + + virtual NIBBLETYPE MetaRotateCCW(NIBBLETYPE a_Meta) override + { + return ((a_Meta >> 1) | (a_Meta << 3)) & 0x0f; // Rotate bits to the right + } + + + virtual NIBBLETYPE MetaRotateCW(NIBBLETYPE a_Meta) override + { + return ((a_Meta << 1) | (a_Meta >> 3)) & 0x0f; // Rotate bits to the left + } + + + virtual NIBBLETYPE MetaMirrorXY(NIBBLETYPE a_Meta) override + { + // Bits 2 and 4 stay, bits 1 and 3 swap + return ((a_Meta & 0x0a) | ((a_Meta & 0x01) << 2) | ((a_Meta & 0x04) >> 2)); + } + + + virtual NIBBLETYPE MetaMirrorYZ(NIBBLETYPE a_Meta) override + { + // Bits 1 and 3 stay, bits 2 and 4 swap + return ((a_Meta & 0x05) | ((a_Meta & 0x02) << 2) | ((a_Meta & 0x08) >> 2)); + } +} ; + + + + |