flewkey/cuberite-2a
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Comparators and pistons no longer update instantly

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* Fixes #3168.
This commit is contained in:
Tiger Wang 2016-06-05 16:08:47 +01:00
parent a2a9341c24
commit 04cc8aa0f5
4 changed files with 63 additions and 15 deletions
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5
src/Blocks/BlockComparator.h
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@ -60,6 +60,11 @@ public:
return true;
}
inline static bool IsOn(NIBBLETYPE a_Meta)
{
return ((a_Meta & 0x8) == 0x8);
}
inline static Vector3i GetSideCoordinate(const Vector3i & a_Position, NIBBLETYPE a_Meta, bool a_bInverse)
{
auto Position = a_Position;

6
src/Blocks/BlockPiston.h
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@ -93,6 +93,9 @@ public:
return 11;
}
/** Returns true if the piston (with the specified meta) is extended */
static inline bool IsExtended(NIBBLETYPE a_PistonMeta) { return ((a_PistonMeta & 0x8) != 0x0); }
private:
typedef std::unordered_set<Vector3i, VectorHasher<int>> Vector3iSet;
@ -100,9 +103,6 @@ private:
/** Returns true if the piston (specified by blocktype) is a sticky piston */
static inline bool IsSticky(BLOCKTYPE a_BlockType) { return (a_BlockType == E_BLOCK_STICKY_PISTON); }
/** Returns true if the piston (with the specified meta) is extended */
static inline bool IsExtended(NIBBLETYPE a_PistonMeta) { return ((a_PistonMeta & 0x8) != 0x0); }
/** Returns true if the specified block can be pushed by a piston (and left intact) */
static inline bool CanPush(BLOCKTYPE a_BlockType, NIBBLETYPE a_BlockMeta)
{

29
src/Simulator/IncrementalRedstoneSimulator/PistonHandler.h
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@ -39,14 +39,37 @@ public:
virtual cVector3iArray Update(const Vector3i & a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta, PoweringData a_PoweringData) override
{
// LOGD("Evaluating pisty the piston (%d %d %d)", a_Position.x, a_Position.y, a_Position.z);
auto Data = static_cast<cIncrementalRedstoneSimulator *>(m_World.GetRedstoneSimulator())->GetChunkData();
auto DelayInfo = Data->GetMechanismDelayInfo(a_Position);
if (a_PoweringData.PowerLevel > 0)
// Delay is used here to prevent an infinite loop (#3168)
if (DelayInfo == nullptr)
{
cBlockPistonHandler::ExtendPiston(a_Position, &m_World);
bool ShouldBeExtended = (a_PoweringData.PowerLevel != 0);
if (ShouldBeExtended != cBlockPistonHandler::IsExtended(a_Meta))
{
Data->m_MechanismDelays[a_Position] = std::make_pair(1, ShouldBeExtended);
}
}
else
{
cBlockPistonHandler::RetractPiston(a_Position, &m_World);
int DelayTicks;
bool ShouldBeExtended;
std::tie(DelayTicks, ShouldBeExtended) = *DelayInfo;
if (DelayTicks == 0)
{
if (ShouldBeExtended)
{
cBlockPistonHandler::ExtendPiston(a_Position, &m_World);
}
else
{
cBlockPistonHandler::RetractPiston(a_Position, &m_World);
}
Data->m_MechanismDelays.erase(a_Position);
}
}
return {};

38
src/Simulator/IncrementalRedstoneSimulator/RedstoneComparatorHandler.h
View File

@ -99,22 +99,42 @@ public:
virtual cVector3iArray Update(const Vector3i & a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta, PoweringData a_PoweringData) override
{
// Note that a_PoweringData here contains the maximum *side* power level, as specified by GetValidSourcePositions
// LOGD("Evaluating ALU the comparator (%d %d %d)", a_Position.x, a_Position.y, a_Position.z);
auto Data = static_cast<cIncrementalRedstoneSimulator *>(m_World.GetRedstoneSimulator())->GetChunkData();
auto DelayInfo = Data->GetMechanismDelayInfo(a_Position);
if (GetPowerLevel(a_Position, a_BlockType, a_Meta) > 0)
// Delay is used here to prevent an infinite loop (#3168)
if (DelayInfo == nullptr)
{
m_World.SetBlockMeta(a_Position, a_Meta | 0x8);
auto Power = GetFrontPowerLevel(a_Position, a_BlockType, a_Meta, a_PoweringData.PowerLevel);
auto PreviousFrontPower = static_cast<cIncrementalRedstoneSimulator *>(m_World.GetRedstoneSimulator())->GetChunkData()->ExchangeUpdateOncePowerData(a_Position, PoweringData(a_PoweringData.PoweringBlock, Power));
bool ShouldBeOn = (GetPowerLevel(a_Position, a_BlockType, a_Meta) > 0); // Provide visual indication by examining *rear* power level
bool ShouldUpdate = (Power != PreviousFrontPower.PowerLevel); // "Business logic" (:P) - determine by examining *side* power levels
if (ShouldUpdate || (ShouldBeOn != cBlockComparatorHandler::IsOn(a_Meta)))
{
Data->m_MechanismDelays[a_Position] = std::make_pair(1, ShouldBeOn);
}
}
else
{
m_World.SetBlockMeta(a_Position, a_Meta & 0x7);
}
int DelayTicks;
bool ShouldPowerOn;
std::tie(DelayTicks, ShouldPowerOn) = *DelayInfo;
auto Power = GetFrontPowerLevel(a_Position, a_BlockType, a_Meta, a_PoweringData.PowerLevel);
auto PreviousFrontPower = static_cast<cIncrementalRedstoneSimulator *>(m_World.GetRedstoneSimulator())->GetChunkData()->ExchangeUpdateOncePowerData(a_Position, PoweringData(a_PoweringData.PoweringBlock, Power));
if (Power != PreviousFrontPower.PowerLevel)
{
return GetAdjustedRelatives(a_Position, GetRelativeLaterals());
if (DelayTicks == 0)
{
m_World.SetBlockMeta(a_Position, ShouldPowerOn ? (a_Meta | 0x8) : (a_Meta & 0x7));
Data->m_MechanismDelays.erase(a_Position);
// Assume that an update (to front power) is needed.
// Note: potential inconsistencies will arise as power data is updated before-delay due to limitations of the power data caching functionality (only stores one bool)
// This means that other mechanisms like wires may get our new power data before our delay has finished
// This also means that we have to manually update ourselves to be aware of any changes that happened in the previous redstone tick
return StaticAppend(GetAdjustedRelatives(a_Position, GetRelativeLaterals()), { a_Position });
}
}
return {};