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Diffstat (limited to 'src/Simulator/FloodyFluidSimulator.cpp')
| -rw-r--r-- | src/Simulator/FloodyFluidSimulator.cpp | 330 |
1 files changed, 330 insertions, 0 deletions
diff --git a/src/Simulator/FloodyFluidSimulator.cpp b/src/Simulator/FloodyFluidSimulator.cpp new file mode 100644 index 000000000..d204a1f8b --- /dev/null +++ b/src/Simulator/FloodyFluidSimulator.cpp @@ -0,0 +1,330 @@ + +// FloodyFluidSimulator.cpp + +// Interfaces to the cFloodyFluidSimulator that represents a fluid simulator that tries to flood everything :) +// http://forum.mc-server.org/showthread.php?tid=565 + +#include "Globals.h" + +#include "FloodyFluidSimulator.h" +#include "../World.h" +#include "../Chunk.h" +#include "../BlockArea.h" +#include "../Blocks/BlockHandler.h" + + + + + +// Enable or disable detailed logging +#if 0 + #define FLOG LOGD +#else + #define FLOG(...) +#endif + + + + + +cFloodyFluidSimulator::cFloodyFluidSimulator( + cWorld & a_World, + BLOCKTYPE a_Fluid, + BLOCKTYPE a_StationaryFluid, + NIBBLETYPE a_Falloff, + int a_TickDelay, + int a_NumNeighborsForSource +) : + super(a_World, a_Fluid, a_StationaryFluid, a_TickDelay), + m_Falloff(a_Falloff), + m_NumNeighborsForSource(a_NumNeighborsForSource) +{ +} + + + + + +void cFloodyFluidSimulator::SimulateBlock(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_RelZ) +{ + FLOG("Simulating block {%d, %d, %d}: block %d, meta %d", + a_Chunk->GetPosX() * cChunkDef::Width + a_RelX, a_RelY, a_Chunk->GetPosZ() * cChunkDef::Width + a_RelZ, + a_Chunk->GetBlock(a_RelX, a_RelY, a_RelZ), + a_Chunk->GetMeta(a_RelX, a_RelY, a_RelZ) + ); + + NIBBLETYPE MyMeta = a_Chunk->GetMeta(a_RelX, a_RelY, a_RelZ); + if (!IsAnyFluidBlock(a_Chunk->GetBlock(a_RelX, a_RelY, a_RelZ))) + { + // Can happen - if a block is scheduled for simulating and gets replaced in the meantime. + FLOG(" BadBlockType exit"); + return; + } + + if (MyMeta != 0) + { + // Source blocks aren't checked for tributaries, others are. + if (CheckTributaries(a_Chunk, a_RelX, a_RelY, a_RelZ, MyMeta)) + { + // Has no tributary, has been decreased (in CheckTributaries()), + // no more processing needed (neighbors have been scheduled by the decrease) + FLOG(" CheckTributaries exit"); + return; + } + } + + // New meta for the spreading to neighbors: + // If this is a source block or was falling, the new meta is just the falloff + // Otherwise it is the current meta plus falloff (may be larger than max height, will be checked later) + NIBBLETYPE NewMeta = ((MyMeta == 0) || ((MyMeta & 0x08) != 0)) ? m_Falloff : (MyMeta + m_Falloff); + bool SpreadFurther = true; + if (a_RelY > 0) + { + BLOCKTYPE Below = a_Chunk->GetBlock(a_RelX, a_RelY - 1, a_RelZ); + if (IsPassableForFluid(Below) || IsBlockLava(Below) || IsBlockWater(Below)) + { + // Spread only down, possibly washing away what's there or turning lava to stone / cobble / obsidian: + SpreadToNeighbor(a_Chunk, a_RelX, a_RelY - 1, a_RelZ, 8); + SpreadFurther = false; + } + // If source creation is on, check for it here: + else if ( + (m_NumNeighborsForSource > 0) && // Source creation is on + (MyMeta == m_Falloff) && // Only exactly one block away from a source (fast bail-out) + !IsPassableForFluid(Below) && // Only exactly 1 block deep + CheckNeighborsForSource(a_Chunk, a_RelX, a_RelY, a_RelZ) // Did we create a source? + ) + { + // We created a source, no more spreading is to be done now + // Also has been re-scheduled for ticking in the next wave, so no marking is needed + return; + } + } + + if (SpreadFurther && (NewMeta < 8)) + { + // Spread to the neighbors: + SpreadToNeighbor(a_Chunk, a_RelX - 1, a_RelY, a_RelZ, NewMeta); + SpreadToNeighbor(a_Chunk, a_RelX + 1, a_RelY, a_RelZ, NewMeta); + SpreadToNeighbor(a_Chunk, a_RelX, a_RelY, a_RelZ - 1, NewMeta); + SpreadToNeighbor(a_Chunk, a_RelX, a_RelY, a_RelZ + 1, NewMeta); + } + + // Mark as processed: + a_Chunk->FastSetBlock(a_RelX, a_RelY, a_RelZ, m_StationaryFluidBlock, MyMeta); +} + + + + + +bool cFloodyFluidSimulator::CheckTributaries(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_MyMeta) +{ + // If we have a section above, check if there's fluid above this block that would feed it: + if (a_RelY < cChunkDef::Height - 1) + { + if (IsAnyFluidBlock(a_Chunk->GetBlock(a_RelX, a_RelY + 1, a_RelZ))) + { + // This block is fed from above, no more processing needed + FLOG(" Fed from above"); + return false; + } + } + + // Not fed from above, check if there's a feed from the side (but not if it's a downward-flowing block): + if (a_MyMeta != 8) + { + BLOCKTYPE BlockType; + NIBBLETYPE BlockMeta; + static const Vector3i Coords[] = + { + Vector3i( 1, 0, 0), + Vector3i(-1, 0, 0), + Vector3i( 0, 0, 1), + Vector3i( 0, 0, -1), + } ; + for (int i = 0; i < ARRAYCOUNT(Coords); i++) + { + if (!a_Chunk->UnboundedRelGetBlock(a_RelX + Coords[i].x, a_RelY, a_RelZ + Coords[i].z, BlockType, BlockMeta)) + { + continue; + } + if (IsAllowedBlock(BlockType) && IsHigherMeta(BlockMeta, a_MyMeta)) + { + // This block is fed, no more processing needed + FLOG(" Fed from {%d, %d, %d}, type %d, meta %d", + a_Chunk->GetPosX() * cChunkDef::Width + a_RelX + Coords[i].x, + a_RelY, + a_Chunk->GetPosZ() * cChunkDef::Width + a_RelZ + Coords[i].z, + BlockType, BlockMeta + ); + return false; + } + } // for i - Coords[] + } // if not fed from above + + // Block is not fed, decrease by m_Falloff levels: + if (a_MyMeta >= 8) + { + FLOG(" Not fed and downwards, turning into non-downwards meta %d", m_Falloff); + a_Chunk->SetBlock(a_RelX, a_RelY, a_RelZ, m_StationaryFluidBlock, m_Falloff); + } + else + { + a_MyMeta += m_Falloff; + if (a_MyMeta < 8) + { + FLOG(" Not fed, decreasing from %d to %d", a_MyMeta - m_Falloff, a_MyMeta); + a_Chunk->SetBlock(a_RelX, a_RelY, a_RelZ, m_StationaryFluidBlock, a_MyMeta); + } + else + { + FLOG(" Not fed, meta %d, erasing altogether", a_MyMeta); + a_Chunk->SetBlock(a_RelX, a_RelY, a_RelZ, E_BLOCK_AIR, 0); + } + } + return true; +} + + + + + +void cFloodyFluidSimulator::SpreadToNeighbor(cChunk * a_NearChunk, int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_NewMeta) +{ + ASSERT(a_NewMeta <= 8); // Invalid meta values + ASSERT(a_NewMeta > 0); // Source blocks aren't spread + + BLOCKTYPE BlockType; + NIBBLETYPE BlockMeta; + if (!a_NearChunk->UnboundedRelGetBlock(a_RelX, a_RelY, a_RelZ, BlockType, BlockMeta)) + { + // Chunk not available + return; + } + + if (IsAllowedBlock(BlockType)) + { + if ((BlockMeta == a_NewMeta) || IsHigherMeta(BlockMeta, a_NewMeta)) + { + // Don't spread there, there's already a higher or same level there + return; + } + } + + // Check water - lava interaction: + if (m_FluidBlock == E_BLOCK_LAVA) + { + if (IsBlockWater(BlockType)) + { + // Lava flowing into water, change to stone / cobblestone based on direction: + BLOCKTYPE NewBlock = (a_NewMeta == 8) ? E_BLOCK_STONE : E_BLOCK_COBBLESTONE; + FLOG(" Lava flowing into water, turning water at rel {%d, %d, %d} into stone", + a_RelX, a_RelY, a_RelZ, + ItemTypeToString(NewBlock).c_str() + ); + a_NearChunk->UnboundedRelSetBlock(a_RelX, a_RelY, a_RelZ, NewBlock, 0); + m_World.BroadcastSoundEffect("random.fizz", a_RelX * 8, a_RelY * 8, a_RelZ * 8, 0.5f, 1.5f); + return; + } + } + else if (m_FluidBlock == E_BLOCK_WATER) + { + if (IsBlockLava(BlockType)) + { + // Water flowing into lava, change to cobblestone / obsidian based on dest block: + BLOCKTYPE NewBlock = (BlockMeta == 0) ? E_BLOCK_OBSIDIAN : E_BLOCK_COBBLESTONE; + FLOG(" Water flowing into lava, turning lava at rel {%d, %d, %d} into %s", + a_RelX, a_RelY, a_RelZ, ItemTypeToString(NewBlock).c_str() + ); + a_NearChunk->UnboundedRelSetBlock(a_RelX, a_RelY, a_RelZ, NewBlock, 0); + m_World.BroadcastSoundEffect("random.fizz", a_RelX * 8, a_RelY * 8, a_RelZ * 8, 0.5f, 1.5f); + return; + } + } + else + { + ASSERT(!"Unknown fluid!"); + } + + if (!IsPassableForFluid(BlockType)) + { + // Can't spread there + return; + } + + // Wash away the block there, if possible: + if (CanWashAway(BlockType)) + { + cBlockHandler * Handler = BlockHandler(BlockType); + if (Handler->DoesDropOnUnsuitable()) + { + Handler->DropBlock( + &m_World, NULL, + a_NearChunk->GetPosX() * cChunkDef::Width + a_RelX, + a_RelY, + a_NearChunk->GetPosZ() * cChunkDef::Width + a_RelZ + ); + } + } // if (CanWashAway) + + // Spread: + FLOG(" Spreading to {%d, %d, %d} with meta %d", + a_NearChunk->GetPosX() * cChunkDef::Width + a_RelX, + a_RelY, + a_NearChunk->GetPosZ() * cChunkDef::Width + a_RelZ, + a_NewMeta + ); + a_NearChunk->UnboundedRelSetBlock(a_RelX, a_RelY, a_RelZ, m_FluidBlock, a_NewMeta); +} + + + + + +bool cFloodyFluidSimulator::CheckNeighborsForSource(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_RelZ) +{ + FLOG(" Checking neighbors for source creation"); + + static const Vector3i NeighborCoords[] = + { + Vector3i(-1, 0, 0), + Vector3i( 1, 0, 0), + Vector3i( 0, 0, -1), + Vector3i( 0, 0, 1), + } ; + + int NumNeeded = m_NumNeighborsForSource; + for (int i = 0; i < ARRAYCOUNT(NeighborCoords); i++) + { + int x = a_RelX + NeighborCoords[i].x; + int y = a_RelY + NeighborCoords[i].y; + int z = a_RelZ + NeighborCoords[i].z; + BLOCKTYPE BlockType; + NIBBLETYPE BlockMeta; + if (!a_Chunk->UnboundedRelGetBlock(x, y, z, BlockType, BlockMeta)) + { + // Neighbor not available, skip it + continue; + } + // FLOG(" Neighbor at {%d, %d, %d}: %s", x, y, z, ItemToFullString(cItem(BlockType, 1, BlockMeta)).c_str()); + if ((BlockMeta == 0) && IsAnyFluidBlock(BlockType)) + { + NumNeeded--; + // FLOG(" Found a neighbor source at {%d, %d, %d}, NumNeeded := %d", x, y, z, NumNeeded); + if (NumNeeded == 0) + { + // Found enough, turn into a source and bail out + // FLOG(" Found enough neighbor sources, turning into a source"); + a_Chunk->SetBlock(a_RelX, a_RelY, a_RelZ, m_FluidBlock, 0); + return true; + } + } + } + // FLOG(" Not enough neighbors for turning into a source, NumNeeded = %d", NumNeeded); + return false; +} + + + + |