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#pragma once
#include "../../Blocks/BlockComparator.h"
namespace RedstoneComparatorHandler
{
static unsigned char GetFrontPowerLevel(NIBBLETYPE a_Meta, unsigned char a_HighestSidePowerLevel, unsigned char a_HighestRearPowerLevel)
{
if (cBlockComparatorHandler::IsInSubtractionMode(a_Meta))
{
// Subtraction mode
return static_cast<unsigned char>(std::max(static_cast<char>(a_HighestRearPowerLevel) - a_HighestSidePowerLevel, 0));
}
else
{
// Comparison mode
return (a_HighestRearPowerLevel < a_HighestSidePowerLevel) ? 0 : a_HighestRearPowerLevel;
}
}
static PowerLevel GetPowerDeliveredToPosition(const cChunk & a_Chunk, Vector3i a_Position, BLOCKTYPE a_BlockType, Vector3i a_QueryPosition, BLOCKTYPE a_QueryBlockType, bool IsLinked)
{
UNUSED(a_QueryPosition);
UNUSED(a_QueryBlockType);
const auto Meta = a_Chunk.GetMeta(a_Position);
return (
(cBlockComparatorHandler::GetFrontCoordinate(a_Position, Meta & 0x3) == a_QueryPosition) ?
DataForChunk(a_Chunk).GetCachedPowerData(a_Position) : 0
);
}
static unsigned char GetPowerLevel(cChunk & a_Chunk, Vector3i Position, BLOCKTYPE BlockType, NIBBLETYPE Meta)
{
UInt8 SignalStrength = 0;
auto RearCoordinate = cBlockComparatorHandler::GetRearCoordinate(Position, Meta & 0x3);
auto RearChunk = a_Chunk.GetRelNeighborChunkAdjustCoords(RearCoordinate);
if ((RearChunk == nullptr) || !RearChunk->IsValid())
{
return SignalStrength;
}
RearChunk->DoWithBlockEntityAt(RearCoordinate, [&](cBlockEntity & a_BlockEntity)
{
// Skip BlockEntities that don't have slots
auto BlockEntityWithItems = dynamic_cast<cBlockEntityWithItems *>(&a_BlockEntity);
if (BlockEntityWithItems == nullptr)
{
return false;
}
// TODO: handle double chests
auto & Contents = BlockEntityWithItems->GetContents();
float Fullness = 0; // Is a floating-point type to allow later calculation to produce a non-truncated value
for (int Slot = 0; Slot != Contents.GetNumSlots(); ++Slot)
{
Fullness += static_cast<float>(Contents.GetSlot(Slot).m_ItemCount) / Contents.GetSlot(Slot).GetMaxStackSize();
}
SignalStrength = (Fullness < 0.001 /* container empty? */) ? 0 : static_cast<UInt8>(1 + (Fullness / Contents.GetNumSlots()) * 14);
return false;
});
const auto RearType = RearChunk->GetBlock(RearCoordinate);
return std::max(
SignalStrength,
RedstoneHandler::GetPowerDeliveredToPosition(
*RearChunk, RearCoordinate, RearType,
cIncrementalRedstoneSimulatorChunkData::RebaseRelativePosition(a_Chunk, *RearChunk, Position), BlockType, false
)
);
}
static void Update(cChunk & a_Chunk, cChunk & CurrentlyTicking, Vector3i a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta, const PowerLevel Power)
{
// Note that Power 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 = DataForChunk(a_Chunk);
auto DelayInfo = Data.GetMechanismDelayInfo(a_Position);
// Delay is used here to prevent an infinite loop (#3168)
if (DelayInfo == nullptr)
{
const auto RearPower = GetPowerLevel(a_Chunk, a_Position, a_BlockType, a_Meta);
const auto FrontPower = GetFrontPowerLevel(a_Meta, Power, RearPower);
const auto PreviousFrontPower = Data.GetCachedPowerData(a_Position);
const bool ShouldUpdate = (FrontPower != PreviousFrontPower); // "Business logic" (:P) - determined by side and rear power levels
if (ShouldUpdate)
{
Data.m_MechanismDelays[a_Position] = std::make_pair(1, bool());
}
return;
}
int DelayTicks;
std::tie(DelayTicks, std::ignore) = *DelayInfo;
if (DelayTicks != 0)
{
return;
}
const auto RearPower = GetPowerLevel(a_Chunk, a_Position, a_BlockType, a_Meta);
const auto FrontPower = GetFrontPowerLevel(a_Meta, Power, RearPower);
const NIBBLETYPE NewMeta = (FrontPower > 0) ? (a_Meta | 0x08u) : (a_Meta & 0x07u);
// Don't care about the previous power level so return value ignored
Data.ExchangeUpdateOncePowerData(a_Position, FrontPower);
a_Chunk.SetMeta(a_Position, NewMeta);
Data.m_MechanismDelays.erase(a_Position);
// Assume that an update (to front power) is needed:
UpdateAdjustedRelative(a_Chunk, CurrentlyTicking, a_Position, cBlockComparatorHandler::GetFrontCoordinate(a_Position, a_Meta & 0x3) - a_Position);
}
static void ForValidSourcePositions(const cChunk & a_Chunk, Vector3i a_Position, BLOCKTYPE a_BlockType, NIBBLETYPE a_Meta, ForEachSourceCallback & Callback)
{
UNUSED(a_Chunk);
UNUSED(a_BlockType);
Callback(cBlockComparatorHandler::GetSideCoordinate(a_Position, a_Meta & 0x3, false));
Callback(cBlockComparatorHandler::GetSideCoordinate(a_Position, a_Meta & 0x3, true));
}
};
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