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#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 );
}
}
}
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