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#include "Globals.h" // NOTE: MSVC stupidness requires this to be the same across all modules
#include "Piston.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[];
//Replace AddDir (...) with the switch cases that, sets coords in direction of piston face
#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 cause inf loop
LOGD("cPiston::FirstPassthroughBlock - piston has invalid meta data!\n");
return 9001;
}
BLOCKTYPE currBlock;
NIBBLETYPE currMeta;
for (ret = 0; ret < 24; ret++) //Push up to 24 blocks
{
AddDir( pistonX, pistonY, pistonZ, pistonmeta, 1) //Set the coords one further from the piston direction
m_World->GetBlockTypeMeta(pistonX, pistonY, pistonZ, currBlock, currMeta);
if ((currBlock == E_BLOCK_BEDROCK) || (currBlock == E_BLOCK_OBSIDIAN) || (currBlock == E_BLOCK_PISTON_EXTENSION) || ( (currMeta & 0x8) != 0x0 ))
{
return 9001;
}
if (g_BlockPistonBreakable[currBlock]) //If it's a breakable block (air, torch, etc.) then the line of blocks can be pushed
{
return ret;
}
}
return 9001; //There is no space for the blocks to move within 24 spaces, piston can't push
}
void cPiston::ExtendPiston( int pistx, int pisty, int pistz )
{
BLOCKTYPE pistonBlock;
NIBBLETYPE pistonMeta;
m_World->GetBlockTypeMeta(pistx, pisty, pistz, pistonBlock, pistonMeta);
char isSticky = (char)(pistonBlock == E_BLOCK_STICKY_PISTON) * 8;
if ( (pistonMeta & 0x8) != 0x0 )
{
// Piston already extended, bail out
return;
}
unsigned short dist = FirstPassthroughBlock(pistx, pisty, pistz, pistonMeta);
if (dist > 9000) return; // FirstPassthroughBlock says piston can't push anything, bail out
AddDir(pistx, pisty, pistz, pistonMeta & 7, dist + 1) //Get the coords of the air / breakable block in the line, dist+1 because of coords
BLOCKTYPE currBlock;
NIBBLETYPE currMeta;
m_World->GetBlockTypeMeta(pistx, pisty, pistz, currBlock, currMeta);
if (currBlock != E_BLOCK_AIR)
{
cBlockHandler * Handler = BlockHandler(currBlock);
if (Handler->DoesDropOnUnsuitable())
{
Handler->DropBlock(m_World, NULL, pistx, pisty, pistz); //If block is breakable, drop it
}
}
int oldx = pistx, oldy = pisty, oldz = pistz; //Make a second set of coord vars along with the originals
NIBBLETYPE currBlockMeta;
if (dist != 0) //Check for single block being pushed - for loop doesn't catch it in time and breaks stuffz
{
for (int i = dist + 1; i > 1; i--) //Decrement from the dropped breakable block to two further than the piston (one further will be future extension)
{
AddDir(pistx, pisty, pistz, pistonMeta & 7, -1) //Move one set of coords one back from breakable dropped block
m_World->GetBlockTypeMeta(pistx, pisty, pistz, currBlock, currBlockMeta); //Get the block
m_World->SetBlock( oldx, oldy, oldz, currBlock, currBlockMeta); //Set the block at the location of the original coords
oldx = pistx; //Shift the selectors down a block and repeat
oldy = pisty;
oldz = pistz;
}
}
int extx = pistx;
int exty = pisty;
int extz = pistz;
AddDir(pistx, pisty, pistz, pistonMeta & 7, -1) //Move back one block to the piston base
m_World->BroadcastBlockAction(pistx, pisty, pistz, 0, pistonMeta, E_BLOCK_PISTON); //Set the base
m_World->BroadcastSoundEffect("tile.piston.out", pistx * 8, pisty * 8, pistz * 8, 0.5f, 0.7f);
m_World->FastSetBlock( pistx, pisty, pistz, pistonBlock, pistonMeta | 0x8 );
m_World->SetBlock(extx, exty, extz, E_BLOCK_PISTON_EXTENSION, isSticky + pistonMeta); //Set the arm
}
void cPiston::RetractPiston( int pistx, int pisty, int pistz )
{
BLOCKTYPE pistonBlock;
NIBBLETYPE pistonMeta;
m_World->GetBlockTypeMeta(pistx, pisty, pistz, pistonBlock, pistonMeta);
if (pistonMeta <= 6)
{
// Already retracted, bail out
return;
}
m_World->BroadcastBlockAction(pistx, pisty, pistz, 1, pistonMeta & ~(8), E_BLOCK_PISTON);
m_World->BroadcastSoundEffect("tile.piston.in", pistx * 8, pisty * 8, pistz * 8, 0.5f, 0.7f);
m_World->FastSetBlock(pistx, pisty, pistz, pistonBlock, pistonMeta & ~(8)); //Set the base
AddDir(pistx, pisty, pistz, pistonMeta & 7, 1) //Move forwards to the extension coord
if (m_World->GetBlock(pistx, pisty, pistz) != E_BLOCK_PISTON_EXTENSION)
{
LOGD("%s: Piston without an extension?", __FUNCTION__);
return;
}
if (pistonBlock == E_BLOCK_STICKY_PISTON)
{
int tempx = pistx, tempy = pisty, tempz = pistz;
AddDir( tempx, tempy, tempz, pistonMeta & 7, 1 ) //Move forward to the block being pulled
BLOCKTYPE tempblock;
NIBBLETYPE tempmeta;
m_World->GetBlockTypeMeta(tempx, tempy, tempz, tempblock, tempmeta); //Check for pullable-ness
if (
(tempblock == E_BLOCK_OBSIDIAN) ||
(tempblock == E_BLOCK_BEDROCK) ||
(tempblock == E_BLOCK_PISTON_EXTENSION) ||
(g_BlockPistonBreakable[tempblock]) ||
((tempmeta & 0x8) != 0x0 )
)
{
// These cannot be moved by the sticky piston, bail out
return;
}
m_World->SetBlock(pistx, pisty, pistz, tempblock, tempmeta);
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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