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cuberite-2a/src/Blocks/BlockPiston.cpp
2014-10-22 20:12:49 -07:00

279 lines
8.0 KiB
C++

#include "Globals.h"
#include "BlockPiston.h"
#include "../Item.h"
#include "../World.h"
#include "../Entities/Player.h"
#include "BlockInServerPluginInterface.h"
#include "ChunkInterface.h"
#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_TICK_DELAY 1
#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);
}
}
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;
}
int cBlockPistonHandler::FirstPassthroughBlock(int a_PistonX, int a_PistonY, int a_PistonZ, NIBBLETYPE pistonmeta, cWorld * a_World)
{
// Examine each of the 12 blocks ahead of the piston:
for (int ret = 0; ret < PISTON_MAX_PUSH_DISTANCE; ret++)
{
BLOCKTYPE currBlock;
NIBBLETYPE currMeta;
AddPistonDir(a_PistonX, a_PistonY, a_PistonZ, pistonmeta, 1);
a_World->GetBlockTypeMeta(a_PistonX, a_PistonY, a_PistonZ, currBlock, currMeta);
if (cBlockInfo::IsPistonBreakable(currBlock))
{
// This block breaks when pushed, extend up to here
return ret;
}
if (!CanPush(currBlock, currMeta))
{
// This block cannot be pushed at all, the piston can't extend
return -1;
}
}
// There is no space for the blocks to move, piston can't extend
return -1;
}
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 dist = FirstPassthroughBlock(a_BlockX, a_BlockY, a_BlockZ, pistonMeta, a_World);
if (dist < 0)
{
// FirstPassthroughBlock says piston can't push anything, bail out
return;
}
a_World->BroadcastBlockAction(a_BlockX, a_BlockY, a_BlockZ, 0, pistonMeta, pistonBlock);
a_World->BroadcastSoundEffect("tile.piston.out", (double)a_BlockX, (double)a_BlockY, (double)a_BlockZ, 0.5f, 0.7f);
// Drop the breakable block in the line, if appropriate:
AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, pistonMeta, dist + 1); // "a_Block" now at the breakable / empty block
BLOCKTYPE currBlock;
NIBBLETYPE currMeta;
a_World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, currBlock, currMeta);
if (currBlock != E_BLOCK_AIR)
{
cBlockHandler * Handler = BlockHandler(currBlock);
if (Handler->DoesDropOnUnsuitable())
{
cChunkInterface ChunkInterface(a_World->GetChunkMap());
cBlockInServerPluginInterface PluginInterface(*a_World);
Handler->DropBlock(ChunkInterface, *a_World, PluginInterface, nullptr, a_BlockX, a_BlockY, a_BlockZ);
}
}
// Push blocks, from the furthest to the nearest:
int oldx = a_BlockX, oldy = a_BlockY, oldz = a_BlockZ;
NIBBLETYPE currBlockMeta;
std::vector<Vector3i> ScheduledBlocks;
ScheduledBlocks.reserve(PISTON_MAX_PUSH_DISTANCE);
for (int i = dist + 1; i > 1; i--)
{
AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, pistonMeta, -1);
a_World->GetBlockTypeMeta(a_BlockX, a_BlockY, a_BlockZ, currBlock, currBlockMeta);
a_World->SetBlock(oldx, oldy, oldz, currBlock, currBlockMeta, false);
ScheduledBlocks.push_back(Vector3i(oldx, oldy, oldz));
oldx = a_BlockX;
oldy = a_BlockY;
oldz = a_BlockZ;
}
int extx = a_BlockX;
int exty = a_BlockY;
int extz = a_BlockZ;
ScheduledBlocks.push_back(Vector3i(extx, exty, extz));
AddPistonDir(a_BlockX, a_BlockY, a_BlockZ, pistonMeta, -1);
// "a_Block" now at piston body, "ext" at future extension
a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, pistonBlock, pistonMeta | 0x8);
a_World->SetBlock(extx, exty, extz, E_BLOCK_PISTON_EXTENSION, pistonMeta | (IsSticky(pistonBlock) ? 8 : 0), false);
a_World->ScheduleTask(PISTON_TICK_DELAY, new cWorld::cTaskSendBlockToAllPlayers(ScheduledBlocks));
}
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", (double)a_BlockX, (double)a_BlockY, (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, false);
a_World->SetBlock(tempx, tempy, tempz, E_BLOCK_AIR, 0, false);
std::vector<Vector3i> ScheduledBlocks;
ScheduledBlocks.push_back(Vector3i(a_BlockX, a_BlockY, a_BlockZ));
ScheduledBlocks.push_back(Vector3i(tempx, tempy, tempz));
a_World->ScheduleTask(PISTON_TICK_DELAY + 1, new cWorld::cTaskSendBlockToAllPlayers(ScheduledBlocks));
return;
}
}
// Retract without pulling
a_World->SetBlock(a_BlockX, a_BlockY, a_BlockZ, E_BLOCK_AIR, 0, false);
std::vector<Vector3i> ScheduledBlocks;
ScheduledBlocks.push_back(Vector3i(a_BlockX, a_BlockY, a_BlockZ));
a_World->ScheduleTask(PISTON_TICK_DELAY + 1, new cWorld::cTaskSendBlockToAllPlayers(ScheduledBlocks));
}
////////////////////////////////////////////////////////////////////////////////
// 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);
}
}