75 lines
2.6 KiB
C++
75 lines
2.6 KiB
C++
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#pragma once
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#include "Simulator.h"
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#include "../IniFile.h"
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/** The fire simulator takes care of the fire blocks.
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It periodically increases their meta ("steps") until they "burn out"; it also supports the forever burning netherrack.
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Each individual fire block gets stored in per-chunk data; that list is then used for fast retrieval.
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The data value associated with each coord is used as the number of msec that the fire takes until
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it progresses to the next step (blockmeta++). This value is updated if a neighbor is changed.
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The simulator reads its parameters from the ini file given to the constructor.
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*/
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class cFireSimulator :
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public cSimulator
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{
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public:
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cFireSimulator(cWorld & a_World, cIniFile & a_IniFile);
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static bool IsFuel (BLOCKTYPE a_BlockType);
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static bool DoesBurnForever(BLOCKTYPE a_BlockType);
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private:
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virtual void Simulate(float a_Dt) override { UNUSED(a_Dt);} // not used
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virtual void SimulateChunk(std::chrono::milliseconds a_Dt, int a_ChunkX, int a_ChunkZ, cChunk * a_Chunk) override;
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static bool IsAllowedBlock(BLOCKTYPE a_BlockType);
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/** Time (in msec) that a fire block takes to burn with a fuel block into the next step */
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unsigned m_BurnStepTimeFuel;
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/** Time (in msec) that a fire block takes to burn without a fuel block into the next step */
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unsigned m_BurnStepTimeNonfuel;
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/** Chance [0..100000] of an adjacent fuel to catch fire on each tick */
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int m_Flammability;
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/** Chance [0..100000] of a fuel burning out being replaced by a new fire block instead of an air block */
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int m_ReplaceFuelChance;
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virtual void AddBlock(cChunk & a_Chunk, Vector3i a_Position, BLOCKTYPE a_Block) override;
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/** Returns the time [msec] after which the specified fire block is stepped again; based on surrounding fuels */
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int GetBurnStepTime(cChunk * a_Chunk, Vector3i a_RelPos);
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/** Tries to spread fire to a neighborhood of the specified block */
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void TrySpreadFire(cChunk * a_Chunk, Vector3i a_RelPos);
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/** Removes all burnable blocks neighboring the specified block */
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void RemoveFuelNeighbors(cChunk * a_Chunk, Vector3i a_RelPos);
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/** Returns true if a fire can be started in the specified block,
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that is, it is an air block and has fuel next to it.
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Note that a_NearChunk may be a chunk neighbor to the block specified!
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The coords are relative to a_NearChunk but not necessarily in it. */
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bool CanStartFireInBlock(cChunk * a_NearChunk, Vector3i a_RelPos);
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} ;
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/** Stores individual fire blocks in the chunk; the int data is used as the time [msec] the fire takes to step to another stage (blockmeta++) */
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typedef cCoordWithIntList cFireSimulatorChunkData;
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