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-rw-r--r--src/Blocks/BlockPiston.cpp177
1 files changed, 172 insertions, 5 deletions
diff --git a/src/Blocks/BlockPiston.cpp b/src/Blocks/BlockPiston.cpp
index 542eb33b5..faf639312 100644
--- a/src/Blocks/BlockPiston.cpp
+++ b/src/Blocks/BlockPiston.cpp
@@ -4,14 +4,14 @@
#include "../Item.h"
#include "../World.h"
#include "../Entities/Player.h"
-#include "../Piston.h"
+#include "BlockInServerPluginInterface.h"
#define AddPistonDir(x, y, z, dir, amount) \
- switch (dir) \
+ switch (dir & 0x07) \
{ \
case 0: (y) -= (amount); break; \
case 1: (y) += (amount); break; \
@@ -19,8 +19,16 @@
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
+
@@ -40,7 +48,7 @@ void cBlockPistonHandler::OnDestroyed(cChunkInterface & a_ChunkInterface, cWorld
int newX = a_BlockX;
int newY = a_BlockY;
int newZ = a_BlockZ;
- AddPistonDir(newX, newY, newZ, OldMeta & ~(8), 1);
+ AddPistonDir(newX, newY, newZ, OldMeta, 1);
if (a_ChunkInterface.GetBlock(newX, newY, newZ) == E_BLOCK_PISTON_EXTENSION)
{
@@ -60,7 +68,7 @@ bool cBlockPistonHandler::GetPlacementBlockTypeMeta(
)
{
a_BlockType = m_BlockType;
- a_BlockMeta = cPiston::RotationPitchToMetaData(a_Player->GetYaw(), a_Player->GetPitch());
+ a_BlockMeta = RotationPitchToMetaData(a_Player->GetYaw(), a_Player->GetPitch());
return true;
}
@@ -68,6 +76,165 @@ bool cBlockPistonHandler::GetPlacementBlockTypeMeta(
+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 (CanBreakPush(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", a_BlockX * 8, a_BlockY * 8, a_BlockZ * 8, 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, NULL, 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", a_BlockX * 8, a_BlockY * 8, a_BlockZ * 8, 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:
@@ -87,7 +254,7 @@ void cBlockPistonHeadHandler::OnDestroyedByPlayer(cChunkInterface & a_ChunkInter
int newX = a_BlockX;
int newY = a_BlockY;
int newZ = a_BlockZ;
- AddPistonDir(newX, newY, newZ, OldMeta & ~(8), -1);
+ AddPistonDir(newX, newY, newZ, OldMeta, -1);
BLOCKTYPE Block = a_ChunkInterface.GetBlock(newX, newY, newZ);
if ((Block == E_BLOCK_STICKY_PISTON) || (Block == E_BLOCK_PISTON))