diff options
Diffstat (limited to 'source/Piston.cpp')
| -rw-r--r-- | source/Piston.cpp | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/source/Piston.cpp b/source/Piston.cpp new file mode 100644 index 000000000..a4c014729 --- /dev/null +++ b/source/Piston.cpp @@ -0,0 +1,152 @@ + +#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules + +#include "Piston.h" +#include "Redstone.h" +#include "ChunkDef.h" +#include "Pickup.h" +#include "Item.h" +#include "Root.h" +#include "ClientHandle.h" +#include "World.h" +#include "BlockID.h" +#include "Server.h" +#include "blocks/BlockHandler.h" + +extern bool g_BlockPistonBreakable[]; + +#define AddDir( x, y, z, dir, amount ) switch(dir) { case 0: (y)-=(amount); break; case 1: (y)+=(amount); break;\ + case 2: (z)-=(amount); break; case 3: (z)+=(amount); break;\ + case 4: (x)-=(amount); break; case 5: (x)+=(amount); break; } + + + + + +cPiston::cPiston( cWorld* a_World ) + :m_World ( a_World ) +{ + +} + +unsigned short cPiston::FirstPassthroughBlock( int pistonX, int pistonY, int pistonZ, char pistonmeta ) { + unsigned short ret; + pistonmeta &= 7; + if(pistonmeta >= 6) { // just in case, it shouldn't happen but if it would, it'd case inf loop + printf("cPiston::FirstPassthroughBlock - piston has invalid meta data!\n"); + return 9001; + } + char currBlock; + for( ret = 0; ret < 24; ret++ ) { // push up to 24 blocks + AddDir( pistonX, pistonY, pistonZ, pistonmeta, 1 ) + currBlock = m_World->GetBlock( pistonX, pistonY, pistonZ ); + if(currBlock == E_BLOCK_BEDROCK || currBlock == E_BLOCK_OBSIDIAN || currBlock == E_BLOCK_PISTON_EXTENSION ) {return 9001;} + if(g_BlockPistonBreakable[currBlock]) {return ret;} + } + return 9001; +} + + + + + +void cPiston::ExtendPiston( int pistx, int pisty, int pistz ) +{ + char pistonBlock = m_World->GetBlock( pistx, pisty, pistz ); + char pistonMeta = m_World->GetBlockMeta( pistx, pisty, pistz ); + char isSticky = (char)(pistonBlock == E_BLOCK_STICKY_PISTON) * 8; + bool recalc = false; + if ( (pistonMeta & 0x8) == 0x0 ) // only extend if piston is not already extended + { + unsigned short dist = FirstPassthroughBlock(pistx, pisty, pistz, pistonMeta); + if (dist > 9000) return; // too many blocks + + AddDir( pistx, pisty, pistz, pistonMeta & 7, dist+1 ) + BLOCKTYPE currBlock = m_World->GetBlock (pistx, pisty, pistz); + NIBBLETYPE currMeta = m_World->GetBlockMeta(pistx, pisty, pistz); + if (currBlock != E_BLOCK_AIR) + { + cBlockHandler * Handler = BlockHandler(currBlock); + if(Handler->DropOnUnsuitable()) + { + Handler->DropBlock(m_World, pistx, pisty, pistz); + } + recalc = true; + } + int oldx = pistx, oldy = pisty, oldz = pistz; + char currBlockMeta; + for (int i = dist + 1; i>0; i--) + { + AddDir(pistx, pisty, pistz, pistonMeta & 7, -1) + currBlock = m_World->GetBlock(pistx, pisty, pistz); + currBlockMeta = m_World->GetBlockMeta(pistx, pisty, pistz); + m_World->SetBlock( oldx, oldy, oldz, currBlock, currBlockMeta); + oldx = pistx; + oldy = pisty; + oldz = pistz; + } + m_World->BroadcastBlockAction(pistx, pisty, pistz, 0, pistonMeta, E_BLOCK_PISTON); + m_World->FastSetBlock( pistx, pisty, pistz, pistonBlock, pistonMeta | 0x8 ); + + int extx = pistx; + int exty = pisty; + int extz = pistz; + + AddDir(extx, exty, extz, pistonMeta & 7, 1) + + m_World->SetBlock(extx, exty, extz, E_BLOCK_PISTON_EXTENSION, isSticky + pistonMeta & 7); + + if (recalc) + { + cRedstone Redstone(m_World); + Redstone.ChangeRedstone(extx, exty, extz, false); // recalculate redstone around current device + Redstone.ChangeRedstone(pistx, pisty, pistz, false); // recalculate redstone around current device + } + } +} + + + + + +void cPiston::RetractPiston( int pistx, int pisty, int pistz ) +{ + char pistonBlock = m_World->GetBlock( pistx, pisty, pistz ); + char pistonMeta = m_World->GetBlockMeta( pistx, pisty, pistz ); + if (pistonMeta <= 6) // only retract if piston is not already retracted + { + return; + } + m_World->BroadcastBlockAction(pistx, pisty, pistz, 1, pistonMeta & ~(8), E_BLOCK_PISTON); + m_World->FastSetBlock(pistx, pisty, pistz, pistonBlock, pistonMeta & ~(8)); + + AddDir(pistx, pisty, pistz, pistonMeta & 7, 1) + if (m_World->GetBlock(pistx, pisty, pistz) == E_BLOCK_PISTON_EXTENSION) + { + if (pistonBlock == E_BLOCK_STICKY_PISTON) + { + int tempx = pistx, tempy = pisty, tempz = pistz; + AddDir( tempx, tempy, tempz, pistonMeta & 7, 1 ) + char tempblock = m_World->GetBlock( tempx, tempy, tempz ); + if ( + (tempblock == E_BLOCK_OBSIDIAN) || + (tempblock == E_BLOCK_BEDROCK) || + (tempblock == E_BLOCK_PISTON_EXTENSION) + ) + { + // These cannot be moved by the sticky piston, bail out + return; + } + m_World->SetBlock( pistx, pisty, pistz, tempblock, m_World->GetBlockMeta( tempx, tempy, tempz ) ); + m_World->SetBlock( tempx, tempy, tempz, E_BLOCK_AIR, 0 ); + } + else + { + m_World->SetBlock( pistx, pisty, pistz, E_BLOCK_AIR, 0 ); + } + } +} + + + + |