From 386d58b5862d8b76925c6523721594887606e82a Mon Sep 17 00:00:00 2001 From: faketruth Date: Mon, 3 Oct 2011 18:41:19 +0000 Subject: MCServer c++ source files git-svn-id: http://mc-server.googlecode.com/svn/trunk@3 0a769ca7-a7f5-676a-18bf-c427514a06d6 --- source/cWaterSimulator.cpp | 216 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 216 insertions(+) create mode 100644 source/cWaterSimulator.cpp (limited to 'source/cWaterSimulator.cpp') diff --git a/source/cWaterSimulator.cpp b/source/cWaterSimulator.cpp new file mode 100644 index 000000000..888ff69c4 --- /dev/null +++ b/source/cWaterSimulator.cpp @@ -0,0 +1,216 @@ +#include "cWaterSimulator.h" +#include "cWorld.h" +#include "Vector3i.h" +#include "BlockID.h" +#include + +class cWaterSimulator::WaterData +{ +public: + WaterData( cWorld* a_World ) + : m_ActiveWater( new std::vector< Vector3i >() ) + , m_Buffer( new std::vector< Vector3i >() ) + , m_World( a_World ) + {} + + std::vector< Vector3i > GetLowestPoints( int a_X, int a_Y, int a_Z ) + { + std::vector< Vector3i > Points; + if( m_World->GetBlock(a_X, a_Y-1, a_Z) == E_BLOCK_AIR ) + { + Points.push_back( Vector3i( a_X, a_Y-1, a_Z ) ); + return Points; + } + + Vector3i LowerPoints [] = { + Vector3i( a_X-1, a_Y-1, a_Z ), + Vector3i( a_X+1, a_Y-1, a_Z ), + Vector3i( a_X, a_Y-1, a_Z-1 ), + Vector3i( a_X, a_Y-1, a_Z+1 ), + }; + bool bWaterFound = false; + for( int i = 0; i < 4; ++i ) + { + char Block1 = m_World->GetBlock( LowerPoints[i].x, LowerPoints[i].y, LowerPoints[i].z ); + char Block2 = m_World->GetBlock( LowerPoints[i].x, a_Y, LowerPoints[i].z ); + if( Block1 == E_BLOCK_AIR && Block2 == E_BLOCK_AIR ) + { + Points.push_back( LowerPoints[i] ); + LowerPoints[i].y = a_Y; + Points.push_back( LowerPoints[i] ); + } + else if( (Block2 == E_BLOCK_WATER || Block2 == E_BLOCK_STATIONARY_WATER ) && ( Block1 == E_BLOCK_AIR || Block1 == E_BLOCK_WATER || Block1 == E_BLOCK_STATIONARY_WATER ) ) + { + bWaterFound = true; + } + } + + if( Points.size() == 0 && !bWaterFound ) + { + Vector3i LevelPoints [] = { + Vector3i( a_X-1, a_Y, a_Z ), + Vector3i( a_X+1, a_Y, a_Z ), + Vector3i( a_X, a_Y, a_Z-1 ), + Vector3i( a_X, a_Y, a_Z+1 ), + }; + for( int i = 0; i < 4; ++i ) + { + char Block = m_World->GetBlock( LevelPoints[i].x, a_Y, LevelPoints[i].z ); + if( Block == E_BLOCK_AIR || Block == E_BLOCK_WATER || Block == E_BLOCK_STATIONARY_WATER ) + Points.push_back( LevelPoints[i] ); + } + } + return Points; + } + + std::vector< Vector3i >* m_ActiveWater; + std::vector< Vector3i >* m_Buffer; + cWorld* m_World; +}; + +cWaterSimulator::cWaterSimulator( cWorld* a_World ) + : m_World( a_World ) + , m_Data( new WaterData( a_World ) ) +{ +} + +cWaterSimulator::~cWaterSimulator() +{ +} + +void cWaterSimulator::WakeUp( int a_X, int a_Y, int a_Z ) +{ + AddBlock( a_X, a_Y, a_Z ); + AddBlock( a_X-1, a_Y, a_Z ); + AddBlock( a_X+1, a_Y, a_Z ); + AddBlock( a_X, a_Y-1, a_Z ); + AddBlock( a_X, a_Y+1, a_Z ); + AddBlock( a_X, a_Y, a_Z-1 ); + AddBlock( a_X, a_Y, a_Z+1 ); +} + +void cWaterSimulator::AddBlock( int a_X, int a_Y, int a_Z ) +{ + // Check for duplicates + std::vector< Vector3i > & ActiveWater = *m_Data->m_ActiveWater; + for( std::vector< Vector3i >::iterator itr = ActiveWater.begin(); itr != ActiveWater.end(); ++itr ) + { + Vector3i & pos = *itr; + if( pos.x == a_X && pos.y == a_Y && pos.z == a_Z ) + return; + } + + ActiveWater.push_back( Vector3i( a_X, a_Y, a_Z ) ); +} + +char cWaterSimulator::GetHighestLevelAround( int a_X, int a_Y, int a_Z ) +{ + char Max = 8; +#define __HIGHLEVEL_CHECK__( x, y, z ) \ + if( IsWaterBlock( m_World->GetBlock( x, y, z ) ) ) \ + { \ + char Meta; \ + if( (Meta = m_World->GetBlockMeta( x, y, z ) ) < Max ) Max = Meta; \ + else if( Meta == 8 ) Max = 0; \ + if( Max == 0 ) return 0; \ + } + + __HIGHLEVEL_CHECK__( a_X-1, a_Y, a_Z ); + __HIGHLEVEL_CHECK__( a_X+1, a_Y, a_Z ); + __HIGHLEVEL_CHECK__( a_X, a_Y, a_Z-1 ); + __HIGHLEVEL_CHECK__( a_X, a_Y, a_Z+1 ); + + return Max; +} + +void cWaterSimulator::Simulate( float a_Dt ) +{ + m_Timer += a_Dt; + + std::swap( m_Data->m_ActiveWater, m_Data->m_Buffer ); // Swap so blocks can be added to empty ActiveWater array + m_Data->m_ActiveWater->clear(); + + std::vector< Vector3i > & WaterBlocks = *m_Data->m_Buffer; + for( std::vector< Vector3i >::iterator itr = WaterBlocks.begin(); itr != WaterBlocks.end(); ++itr ) + { + Vector3i & pos = *itr; + char BlockID = m_World->GetBlock( pos.x, pos.y, pos.z ); + if( IsWaterBlock( BlockID ) ) // only care about water + { + bool bIsFed = false; + char Meta = m_World->GetBlockMeta( pos.x, pos.y, pos.z ); + char Feed = Meta; + if( Meta == 8 ) // Falling water + { + if( IsWaterBlock( m_World->GetBlock(pos.x, pos.y+1, pos.z) ) ) // Block above is water + { + bIsFed = true; + Meta = 0; // Make it a full block + } + } + else if( Meta == 0 ) // It's a full block, so it's always fed + { + bIsFed = true; + } + else + { + if( (Feed = GetHighestLevelAround( pos.x, pos.y, pos.z )) < Meta ) + bIsFed = true; + } + + + if( bIsFed ) + { + char DownID = m_World->GetBlock( pos.x, pos.y-1, pos.z ); + if( DownID == E_BLOCK_AIR || IsWaterBlock( DownID ) ) // free for water + { + m_World->FastSetBlock( pos.x, pos.y-1, pos.z, E_BLOCK_WATER, 8 ); // falling + AddBlock( pos.x, pos.y-1, pos.z ); + } + else // Not falling water + { + if( Feed+1 < Meta ) + { + m_World->FastSetBlock( pos.x, pos.y, pos.z, E_BLOCK_WATER, Feed+1 ); + AddBlock( pos.x, pos.y, pos.z ); + } + else if( Meta < 7 ) // 7 is only 1 unit high, so it cannot spread, lower than 7 can though. + { + std::vector< Vector3i > Points = m_Data->GetLowestPoints( pos.x, pos.y, pos.z ); + for( std::vector< Vector3i >::iterator itr = Points.begin(); itr != Points.end(); ++itr ) + { + Vector3i & p = *itr; + char BlockID = m_World->GetBlock( p.x, p.y, p.z ); + if( !IsWaterBlock( BlockID ) ) + { + if( p.y == pos.y ) + m_World->FastSetBlock(p.x, p.y, p.z, E_BLOCK_WATER, Meta+1); + else + m_World->FastSetBlock(p.x, p.y, p.z, E_BLOCK_WATER, 8); + AddBlock( p.x, p.y, p.z ); + } + else // it's water + { + char PointMeta = m_World->GetBlockMeta( p.x, p.y, p.z ); + if( PointMeta > Meta+1 ) + { + AddBlock( p.x, p.y, p.z ); + } + } + } + } + } + } + else // not fed + { + m_World->FastSetBlock( pos.x, pos.y, pos.z, E_BLOCK_AIR, 0 ); + WakeUp( pos.x, pos.y, pos.z ); + } + } + } +} + +bool cWaterSimulator::IsWaterBlock( char a_BlockID ) +{ + return a_BlockID == E_BLOCK_WATER || a_BlockID == E_BLOCK_STATIONARY_WATER; +} \ No newline at end of file -- cgit v1.2.3