DelayedFluidSimulator.cpp

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// DelayedFluidSimulator.cpp

// Interfaces to the cDelayedFluidSimulator class representing a fluid simulator that has a configurable delay
// before simulating a block. Each tick it takes a consecutive delay "slot" and simulates only blocks in that slot.

#include "Globals.h"

#include "DelayedFluidSimulator.h"
#include "../World.h"
#include "../Chunk.h"





// cDelayedFluidSimulatorChunkData::cSlot

bool cDelayedFluidSimulatorChunkData::cSlot::Add(int a_RelX, int a_RelY, int a_RelZ)
{
    ASSERT(a_RelZ >= 0);
    ASSERT(a_RelZ < static_cast<int>(ARRAYCOUNT(m_Blocks)));

    cCoordWithIntVector & Blocks = m_Blocks[a_RelZ];
    int Index = cChunkDef::MakeIndexNoCheck(a_RelX, a_RelY, a_RelZ);
    for (cCoordWithIntVector::const_iterator itr = Blocks.begin(), end = Blocks.end(); itr != end; ++itr)
    {
        if (itr->Data == Index)
        {
            // Already present
            return false;
        }
    }  // for itr - Blocks[]
    Blocks.push_back(cCoordWithInt(a_RelX, a_RelY, a_RelZ, Index));
    return true;
}





// cDelayedFluidSimulatorChunkData:

cDelayedFluidSimulatorChunkData::cDelayedFluidSimulatorChunkData(int a_TickDelay) :
    m_Slots(new cSlot[a_TickDelay])
{
}





cDelayedFluidSimulatorChunkData::~cDelayedFluidSimulatorChunkData()
{
    delete[] m_Slots;
    m_Slots = nullptr;
}





// cDelayedFluidSimulator:

cDelayedFluidSimulator::cDelayedFluidSimulator(cWorld & a_World, BLOCKTYPE a_Fluid, BLOCKTYPE a_StationaryFluid, int a_TickDelay) :
    super(a_World, a_Fluid, a_StationaryFluid),
    m_TickDelay(a_TickDelay),
    m_AddSlotNum(a_TickDelay - 1),
    m_SimSlotNum(0),
    m_TotalBlocks(0)
{
}





void cDelayedFluidSimulator::AddBlock(Vector3i a_Block, cChunk * a_Chunk)
{
    if ((a_Block.y < 0) || (a_Block.y >= cChunkDef::Height))
    {
        // Not inside the world (may happen when rclk with a full bucket - the client sends Y = -1)
        return;
    }

    if ((a_Chunk == nullptr) || !a_Chunk->IsValid())
    {
        return;
    }

    int RelX = a_Block.x - a_Chunk->GetPosX() * cChunkDef::Width;
    int RelZ = a_Block.z - a_Chunk->GetPosZ() * cChunkDef::Width;
    BLOCKTYPE BlockType = a_Chunk->GetBlock(RelX, a_Block.y, RelZ);
    if (BlockType != m_FluidBlock)
    {
        return;
    }

    auto ChunkDataRaw = (m_FluidBlock == E_BLOCK_WATER) ? a_Chunk->GetWaterSimulatorData() : a_Chunk->GetLavaSimulatorData();
    cDelayedFluidSimulatorChunkData * ChunkData = static_cast<cDelayedFluidSimulatorChunkData *>(ChunkDataRaw);
    cDelayedFluidSimulatorChunkData::cSlot & Slot = ChunkData->m_Slots[m_AddSlotNum];

    // Add, if not already present:
    if (!Slot.Add(RelX, a_Block.y, RelZ))
    {
        return;
    }

    ++m_TotalBlocks;
}





void cDelayedFluidSimulator::Simulate(float a_Dt)
{
    m_AddSlotNum = m_SimSlotNum;
    m_SimSlotNum += 1;
    if (m_SimSlotNum >= m_TickDelay)
    {
        m_SimSlotNum = 0;
    }
}





void cDelayedFluidSimulator::SimulateChunk(std::chrono::milliseconds a_Dt, int a_ChunkX, int a_ChunkZ, cChunk * a_Chunk)
{
    auto ChunkDataRaw = (m_FluidBlock == E_BLOCK_WATER) ? a_Chunk->GetWaterSimulatorData() : a_Chunk->GetLavaSimulatorData();
    cDelayedFluidSimulatorChunkData * ChunkData = static_cast<cDelayedFluidSimulatorChunkData *>(ChunkDataRaw);
    cDelayedFluidSimulatorChunkData::cSlot & Slot = ChunkData->m_Slots[m_SimSlotNum];

    // Simulate all the blocks in the scheduled slot:
    for (size_t i = 0; i < ARRAYCOUNT(Slot.m_Blocks); i++)
    {
        cCoordWithIntVector & Blocks = Slot.m_Blocks[i];
        if (Blocks.empty())
        {
            continue;
        }
        for (cCoordWithIntVector::iterator itr = Blocks.begin(), end = Blocks.end(); itr != end; ++itr)
        {
            SimulateBlock(a_Chunk, itr->x, itr->y, itr->z);
        }
        m_TotalBlocks -= static_cast<int>(Blocks.size());
        Blocks.clear();
    }
}