#include "Globals.h"
#include "BlockPiston.h"
#include "../Item.h"
#include "../World.h"
#include "../Entities/Player.h"
#include "BlockInServerPluginInterface.h"
#include "ChunkInterface.h"
#include <vector>
#include <array>
#define AddPistonDir(x, y, z, dir, amount) \
switch (dir & 0x07) \
{ \
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; \
default: \
{ \
LOGWARNING("%s: invalid direction %d, ignoring", __FUNCTION__, dir & 0x07); \
break; \
} \
}
#define PISTON_MAX_PUSH_DISTANCE 12
cBlockPistonHandler::cBlockPistonHandler(BLOCKTYPE a_BlockType)
: cBlockHandler(a_BlockType)
{
}
void cBlockPistonHandler::OnDestroyed(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, int a_BlockX, int a_BlockY, int a_BlockZ)
{
NIBBLETYPE OldMeta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
int newX = a_BlockX;
int newY = a_BlockY;
int newZ = a_BlockZ;
AddPistonDir(newX, newY, newZ, OldMeta, 1);
if (a_ChunkInterface.GetBlock(newX, newY, newZ) == E_BLOCK_PISTON_EXTENSION)
{
a_ChunkInterface.SetBlock(newX, newY, newZ, E_BLOCK_AIR, 0);
}
}
void cBlockPistonHandler::ConvertToPickups(cItems & a_Pickups, NIBBLETYPE a_BlockMeta)
{
// Returning Piston Item without Direction-Metavalue
a_Pickups.push_back(cItem(m_BlockType, 1));
}
bool cBlockPistonHandler::GetPlacementBlockTypeMeta(
cChunkInterface & a_ChunkInterface, cPlayer * a_Player,
int a_BlockX, int a_BlockY, int a_BlockZ, eBlockFace a_BlockFace,
int a_CursorX, int a_CursorY, int a_CursorZ,
BLOCKTYPE & a_BlockType, NIBBLETYPE & a_BlockMeta
)
{
a_BlockType = m_BlockType;
a_BlockMeta = RotationPitchToMetaData(a_Player->GetYaw(), a_Player->GetPitch());
return true;
}
bool cBlockPistonHandler::CanPushBlock(
int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World, bool a_RequirePushable,
std::unordered_set<Vector3i, VectorHasher<int>> & a_BlocksPushed, NIBBLETYPE a_PistonMeta
)
{
const static std::array<Vector3i, 6> pushingDirs = {{ Vector3i(-1, 0, 0), Vector3i(1, 0, 0), Vector3i(0, -1, 0), Vector3i(0, 1, 0),
Vector3i(0, 0, -1), Vector3i(0, 0, 1) }};
BLOCKTYPE currBlock;
NIBBLETYPE currMeta;
a_World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, currBlock, currMeta);
if (currBlock == E_BLOCK_AIR)
{
// Air can be pushed
return true;
}
if (!CanPush(currBlock, currMeta))
{
return !a_RequirePushable;
}
if (a_BlocksPushed.size() >= PISTON_MAX_PUSH_DISTANCE)
{
return false;
}
if (!a_BlocksPushed.emplace(a_BlockX, a_BlockY, a_BlockZ).second || cBlockInfo::IsPistonBreakable(currBlock))
{
return true; // Element exist already
}
if(currBlock == E_BLOCK_SLIME_BLOCK)
{
// Try to push the other directions
for(const Vector3i & testDir : pushingDirs)
{
if(!CanPushBlock(a_BlockX + testDir.x, a_BlockY + testDir.y, a_BlockZ + testDir.z, a_World, false, a_BlocksPushed, a_PistonMeta))
{
return false;
}
}
}
AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, a_PistonMeta, 1);
return CanPushBlock(a_BlockX, a_BlockY, a_BlockZ, a_World, true, a_BlocksPushed, a_PistonMeta);
}
void cBlockPistonHandler::ExtendPiston(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World)
{
BLOCKTYPE pistonBlock;
NIBBLETYPE pistonMeta;
a_World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, pistonBlock, pistonMeta);
if (IsExtended(pistonMeta))
{
// Already extended, bail out
return;
}
int moveX = a_BlockX;
int moveY = a_BlockY;
int moveZ = a_BlockZ;
AddPistonDir(moveX, moveY, moveZ, pistonMeta, 1);
std::unordered_set<Vector3i, VectorHasher<int>> blocksPushed;
if (!CanPushBlock(moveX, moveY, moveZ, a_World, true, blocksPushed, pistonMeta))
{
// Can't push anything, bail out
return;
}
Vector3i pistonMoveVec;
AddPistonDir(pistonMoveVec.x, pistonMoveVec.y, pistonMoveVec.z, pistonMeta, 1);
std::vector<Vector3i> sortedBlocks(blocksPushed.begin(), blocksPushed.end());
std::sort(sortedBlocks.begin(), sortedBlocks.end(), [pistonMoveVec](const Vector3i & a, const Vector3i & b)
{
return a.Dot(pistonMoveVec) > b.Dot(pistonMoveVec);
});
a_World->BroadcastBlockAction(a_BlockX, a_BlockY, a_BlockZ, 0, pistonMeta, pistonBlock);
a_World->BroadcastSoundEffect("tile.piston.out", static_cast<double>(a_BlockX), static_cast<double>(a_BlockY), static_cast<double>(a_BlockZ), 0.5f, 0.7f);
BLOCKTYPE moveBlock;
NIBBLETYPE moveMeta;
for (const Vector3i & moveBlockVec : sortedBlocks)
{
moveX = moveBlockVec.x;
moveY = moveBlockVec.y;
moveZ = moveBlockVec.z;
a_World->GetBlockTypeMeta(moveX, moveY, moveZ, moveBlock, moveMeta);
a_World->SetBlock(moveX, moveY, moveZ, E_BLOCK_AIR, 0);
AddPistonDir(moveX, moveY, moveZ, pistonMeta, 1);
if (cBlockInfo::IsPistonBreakable(moveBlock))
{
cBlockHandler * Handler = BlockHandler(moveBlock);
if (Handler->DoesDropOnUnsuitable())
{
cChunkInterface ChunkInterface(a_World->GetChunkMap());
cBlockInServerPluginInterface PluginInterface(*a_World);
Handler->DropBlock(ChunkInterface, *a_World, PluginInterface, nullptr, moveX, moveY, moveZ);
}
} else
{
a_World->SetBlock(moveX, moveY, moveZ, moveBlock, moveMeta);
}
}
a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, pistonBlock, pistonMeta | 0x8);
AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, pistonMeta, 1);
a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_PISTON_EXTENSION, pistonMeta | (IsSticky(pistonBlock) ? 8 : 0));
}
void cBlockPistonHandler::RetractPiston(int a_BlockX, int a_BlockY, int a_BlockZ, cWorld * a_World)
{
BLOCKTYPE pistonBlock;
NIBBLETYPE pistonMeta;
a_World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, pistonBlock, pistonMeta);
if (!IsExtended(pistonMeta))
{
// Already retracted, bail out
return;
}
// Check the extension:
AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, pistonMeta, 1);
if (a_World->GetBlock(a_BlockX, a_BlockY, a_BlockZ) != E_BLOCK_PISTON_EXTENSION)
{
LOGD("%s: Piston without an extension - still extending, or just in an invalid state?", __FUNCTION__);
return;
}
AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, pistonMeta, -1);
a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, pistonBlock, pistonMeta & ~(8));
a_World->BroadcastBlockAction(a_BlockX, a_BlockY, a_BlockZ, 1, pistonMeta & ~(8), pistonBlock);
a_World->BroadcastSoundEffect("tile.piston.in", static_cast<double>(a_BlockX), static_cast<double>(a_BlockY), static_cast<double>(a_BlockZ), 0.5f, 0.7f);
AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, pistonMeta, 1);
// Retract the extension, pull block if appropriate
if (IsSticky(pistonBlock))
{
int tempx = a_BlockX, tempy = a_BlockY, tempz = a_BlockZ;
AddPistonDir(tempx, tempy, tempz, pistonMeta, 1);
BLOCKTYPE tempBlock;
NIBBLETYPE tempMeta;
a_World->GetBlockTypeMeta(tempx, tempy, tempz, tempBlock, tempMeta);
if (CanPull(tempBlock, tempMeta))
{
// Pull the block
a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, tempBlock, tempMeta);
a_World->SetBlock(tempx, tempy, tempz, E_BLOCK_AIR, 0);
return;
}
}
// Retract without pulling
a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_AIR, 0);
}
////////////////////////////////////////////////////////////////////////////////
// cBlockPistonHeadHandler:
cBlockPistonHeadHandler::cBlockPistonHeadHandler(void) :
super(E_BLOCK_PISTON_EXTENSION)
{
}
void cBlockPistonHeadHandler::OnDestroyedByPlayer(cChunkInterface & a_ChunkInterface, cWorldInterface & a_WorldInterface, cPlayer * a_Player, int a_BlockX, int a_BlockY, int a_BlockZ)
{
NIBBLETYPE OldMeta = a_ChunkInterface.GetBlockMeta(a_BlockX, a_BlockY, a_BlockZ);
int newX = a_BlockX;
int newY = a_BlockY;
int newZ = a_BlockZ;
AddPistonDir(newX, newY, newZ, OldMeta, -1);
BLOCKTYPE Block = a_ChunkInterface.GetBlock(newX, newY, newZ);
if ((Block == E_BLOCK_STICKY_PISTON) || (Block == E_BLOCK_PISTON))
{
a_ChunkInterface.DigBlock(a_WorldInterface, newX, newY, newZ);
if (a_Player->IsGameModeCreative())
{
return; // No pickups if creative
}
cItems Pickups;
Pickups.push_back(cItem(Block, 1));
a_WorldInterface.SpawnItemPickups(Pickups, a_BlockX + 0.5, a_BlockY + 0.5, a_BlockZ + 0.5);
}
}
