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#include "cPiston.h"
#include "cRedstone.h"
#include "cChunk.h"
#include "cPickup.h"
#include "cBlockToPickup.h"
#include "cItem.h"
#include "cRoot.h"
#include "cClientHandle.h"
#include "cWorld.h"
#include "BlockID.h"
#include "packets/cPacket_BlockAction.h"
#include "cServer.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; }
#define FAST_FLOOR( x ) ( (x) < 0 ? ((int)x)-1 : ((int)x) )
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 < 6) {// 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 )
char currBlock = m_World->GetBlock( pistx, pisty, pistz );
if( currBlock != E_BLOCK_AIR ) {
cItem PickupItem;
PickupItem.m_ItemID = cBlockToPickup::ToPickup( (ENUM_BLOCK_ID) currBlock, E_ITEM_EMPTY );
PickupItem.m_ItemCount = 1;
cPickup* Pickup = new cPickup( pistx*32 + 16, pisty*32 + 16, pistz*32 + 16, PickupItem );
Pickup->Initialize( m_World );
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;
}
cPacket_BlockAction Action;
Action.m_PosX = (int)pistx;
Action.m_PosY = (short)pisty;
Action.m_PosZ = (int)pistz;
Action.m_Byte1 = 0;
Action.m_Byte2 = pistonMeta;
cChunk* Chunk = m_World->GetChunk( FAST_FLOOR(pistx/16), FAST_FLOOR(pisty/16), FAST_FLOOR(pistz/16) );
Chunk->Broadcast( Action );
m_World->FastSetBlock( pistx, pisty, pistz, pistonBlock, pistonMeta | 8 );
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
//send blockaction packet
cPacket_BlockAction Action;
Action.m_PosX = (int)pistx;
Action.m_PosY = (short)pisty;
Action.m_PosZ = (int)pistz;
Action.m_Byte1 = 1;
Action.m_Byte1 = pistonMeta & ~(8);
cChunk* Chunk = m_World->GetChunk( FAST_FLOOR(pistx/16), FAST_FLOOR(pisty/16), FAST_FLOOR(pistz/16) );
Chunk->Broadcast( Action );
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) {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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