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-rw-r--r--src/Simulator/VanillaFluidSimulator.cpp150
1 files changed, 150 insertions, 0 deletions
diff --git a/src/Simulator/VanillaFluidSimulator.cpp b/src/Simulator/VanillaFluidSimulator.cpp
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+++ b/src/Simulator/VanillaFluidSimulator.cpp
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+
+// VanillaFluidSimulator.cpp
+
+#include "Globals.h"
+
+#include "VanillaFluidSimulator.h"
+#include "../World.h"
+#include "../Chunk.h"
+#include "../BlockArea.h"
+#include "../Blocks/BlockHandler.h"
+#include "../BlockInServerPluginInterface.h"
+
+
+
+
+
+static const int InfiniteCost = 100;
+
+
+
+
+
+cVanillaFluidSimulator::cVanillaFluidSimulator(
+ 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_Falloff, a_TickDelay, a_NumNeighborsForSource)
+{
+}
+
+
+
+
+
+void cVanillaFluidSimulator::Spread(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_RelZ, NIBBLETYPE a_NewMeta)
+{
+ int Cost[4];
+ Cost[0] = CalculateFlowCost(a_Chunk, a_RelX + 1, a_RelY, a_RelZ, X_PLUS);
+ Cost[1] = CalculateFlowCost(a_Chunk, a_RelX - 1, a_RelY, a_RelZ, X_MINUS);
+ Cost[2] = CalculateFlowCost(a_Chunk, a_RelX, a_RelY, a_RelZ + 1, Z_PLUS);
+ Cost[3] = CalculateFlowCost(a_Chunk, a_RelX, a_RelY, a_RelZ - 1, Z_MINUS);
+
+ int MinCost = InfiniteCost;
+ for (unsigned int i = 0; i < ARRAYCOUNT(Cost); ++i)
+ {
+ if (Cost[i] < MinCost)
+ {
+ MinCost = Cost[i];
+ }
+ }
+
+ if (Cost[0] == MinCost)
+ {
+ SpreadToNeighbor(a_Chunk, a_RelX + 1, a_RelY, a_RelZ, a_NewMeta);
+ }
+ if (Cost[1] == MinCost)
+ {
+ SpreadToNeighbor(a_Chunk, a_RelX - 1, a_RelY, a_RelZ, a_NewMeta);
+ }
+ if (Cost[2] == MinCost)
+ {
+ SpreadToNeighbor(a_Chunk, a_RelX, a_RelY, a_RelZ + 1, a_NewMeta);
+ }
+ if (Cost[3] == MinCost)
+ {
+ SpreadToNeighbor(a_Chunk, a_RelX, a_RelY, a_RelZ - 1, a_NewMeta);
+ }
+}
+
+
+
+
+
+int cVanillaFluidSimulator::CalculateFlowCost(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_RelZ, Direction a_Dir, unsigned a_Iteration)
+{
+ int Cost = InfiniteCost;
+
+ BLOCKTYPE BlockType;
+ NIBBLETYPE BlockMeta;
+
+ // Check if block is passable
+ if (!a_Chunk->UnboundedRelGetBlock(a_RelX, a_RelY, a_RelZ, BlockType, BlockMeta))
+ {
+ return Cost;
+ }
+ if (!IsPassableForFluid(BlockType))
+ {
+ return Cost;
+ }
+
+ // Check if block below is passable
+ if (!a_Chunk->UnboundedRelGetBlock(a_RelX, a_RelY - 1, a_RelZ, BlockType, BlockMeta))
+ {
+ return Cost;
+ }
+ if (IsPassableForFluid(BlockType))
+ {
+ // Path found, exit
+ return a_Iteration;
+ }
+
+ // 5 blocks away, bail out
+ if (a_Iteration > 3)
+ {
+ return Cost;
+ }
+
+ // Recurse
+ if (a_Dir != X_MINUS)
+ {
+ int NextCost = CalculateFlowCost(a_Chunk, a_RelX + 1, a_RelY, a_RelZ, X_PLUS, a_Iteration + 1);
+ if (NextCost < Cost)
+ {
+ Cost = NextCost;
+ }
+ }
+ if (a_Dir != X_PLUS)
+ {
+ int NextCost = CalculateFlowCost(a_Chunk, a_RelX - 1, a_RelY, a_RelZ, X_MINUS, a_Iteration + 1);
+ if (NextCost < Cost)
+ {
+ Cost = NextCost;
+ }
+ }
+ if (a_Dir != Z_MINUS)
+ {
+ int NextCost = CalculateFlowCost(a_Chunk, a_RelX, a_RelY, a_RelZ + 1, Z_PLUS, a_Iteration + 1);
+ if (NextCost < Cost)
+ {
+ Cost = NextCost;
+ }
+ }
+ if (a_Dir != Z_PLUS)
+ {
+ int NextCost = CalculateFlowCost(a_Chunk, a_RelX, a_RelY, a_RelZ - 1, Z_MINUS, a_Iteration + 1);
+ if (NextCost < Cost)
+ {
+ Cost = NextCost;
+ }
+ }
+
+ return Cost;
+}
+
+
+
+