1 files changed, 63 insertions, 0 deletions

diff --git a/src/Simulator/SandSimulator.h b/src/Simulator/SandSimulator.h
new file mode 100644
index 000000000..6e9ea15ac
--- /dev/null
+++ b/src/Simulator/SandSimulator.h
@@ -0,0 +1,63 @@
+
+#pragma once
+
+#include "Simulator.h"
+
+
+
+
+
+/// Despite the class name, this simulator takes care of all blocks that fall when suspended in the air.
+class cSandSimulator :
+	public cSimulator
+{
+public:
+	cSandSimulator(cWorld & a_World, cIniFile & a_IniFile);
+
+	// cSimulator overrides:
+	virtual void Simulate(float a_Dt) override {}  // Unused in this simulator
+	virtual void SimulateChunk(float a_Dt, int a_ChunkX, int a_ChunkZ, cChunk * a_Chunk) override;
+	virtual bool IsAllowedBlock(BLOCKTYPE a_BlockType) override;
+	
+	/// Returns true if a falling-able block can start falling through the specified block type
+	static bool CanStartFallingThrough(BLOCKTYPE a_BlockType);
+	
+	/// Returns true if an already-falling block can pass through the specified block type (e. g. torch)
+	static bool CanContinueFallThrough(BLOCKTYPE a_BlockType);
+	
+	/// Returns true if the falling block rematerializing will replace the specified block type (e. g. tall grass)
+	static bool IsReplacedOnRematerialization(BLOCKTYPE a_BlockType);
+	
+	/// Returns true if the specified block breaks falling blocks while they fall through it (e. g. halfslabs)
+	static bool DoesBreakFallingThrough(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta);
+	
+	/** Called when a block finishes falling at the specified coords, either by insta-fall,
+	or through cFallingBlock entity.
+	It either rematerializes the block (a_FallingBlockType) at the specified coords, or creates a pickup,
+	based on the block currently present in the world at the dest specified coords
+	*/
+	static void FinishFalling(
+		cWorld * a_World, int a_BlockX, int a_BlockY, int a_BlockZ, 
+		BLOCKTYPE a_FallingBlockType, NIBBLETYPE a_FallingBlockMeta
+	);
+
+protected:
+	bool m_IsInstantFall;  // If set to true, blocks don't fall using cFallingBlock entity, but instantly instead
+	
+	int  m_TotalBlocks;    // Total number of blocks currently in the queue for simulating
+	
+	virtual void AddBlock(int a_BlockX, int a_BlockY, int a_BlockZ, cChunk * a_Chunk) override;
+	
+	/// Performs the instant fall of the block - removes it from top, Finishes it at the bottom
+	void DoInstantFall(cChunk * a_Chunk, int a_RelX, int a_RelY, int a_RelZ);
+};
+
+
+
+
+/// Per-chunk data for the simulator, specified individual chunks to simulate; Data is not used
+typedef cCoordWithIntList cSandSimulatorChunkData;
+
+
+
+