4jcraft/Minecraft.World/WorldGen/Features/VillageFeature.cpp

#include "../../Platform/stdafx.h"
#include "VillageFeature.h"
#include "../Structures/VillagePieces.h"
#include "../../Headers/net.minecraft.world.level.h"
#include "../../Headers/net.minecraft.world.level.biome.h"
#include "../../Headers/net.minecraft.world.level.dimension.h"

std::vector<Biome*> VillageFeature::allowedBiomes;

void VillageFeature::staticCtor() {
    allowedBiomes.push_back(Biome::plains);
    allowedBiomes.push_back(Biome::desert);
}

VillageFeature::VillageFeature(int villageSizeModifier, int iXZSize)
    : StructureFeature(), villageSizeModifier(villageSizeModifier) {
    m_iXZSize = iXZSize;
}

bool VillageFeature::isFeatureChunk(int x, int z, bool bIsSuperflat) {
    int townSpacing;

#ifdef _LARGE_WORLDS
    if (level->dimension->getXZSize() > 128) {
        townSpacing = 32;
    } else
#endif
        if (bIsSuperflat) {
        townSpacing = 32;
    } else {
        townSpacing = 16;  // 4J change 32;
    }

    int minTownSeparation = 8;

    int xx = x;
    int zz = z;
    if (x < 0) x -= townSpacing - 1;
    if (z < 0) z -= townSpacing - 1;

    int xCenterTownChunk = x / townSpacing;
    int zCenterTownChunk = z / townSpacing;
    Random* r =
        level->getRandomFor(xCenterTownChunk, zCenterTownChunk, 10387312);
    xCenterTownChunk *= townSpacing;
    zCenterTownChunk *= townSpacing;
    xCenterTownChunk += r->nextInt(townSpacing - minTownSeparation);
    zCenterTownChunk += r->nextInt(townSpacing - minTownSeparation);
    x = xx;
    z = zz;

    bool forcePlacement = false;
    LevelGenerationOptions* levelGenOptions = app.getLevelGenerationOptions();
    if (levelGenOptions != NULL) {
        forcePlacement =
            levelGenOptions->isFeatureChunk(x, z, eFeature_Village);
    }

    if (forcePlacement || (x == xCenterTownChunk && z == zCenterTownChunk)) {
        bool biomeOk = level->getBiomeSource()->containsOnly(
            x * 16 + 8, z * 16 + 8, 0, allowedBiomes);
        if (biomeOk) {
            // app.DebugPrintf("Biome ok for Village at %d, %d\n",(x * 16 +
            // 8),(z * 16 + 8));
            return true;
        }
    }

    return false;
}

StructureStart* VillageFeature::createStructureStart(int x, int z) {
    // 4J added
    app.AddTerrainFeaturePosition(eTerrainFeature_Village, x, z);

    return new VillageStart(level, random, x, z, villageSizeModifier,
                            m_iXZSize);
}

VillageFeature::VillageStart::VillageStart(Level* level, Random* random,
                                           int chunkX, int chunkZ,
                                           int villageSizeModifier,
                                           int iXZSize) {
    valid = false;  // 4J added initialiser
    m_iXZSize = iXZSize;

    std::list<VillagePieces::PieceWeight*>* pieceSet =
        VillagePieces::createPieceSet(random, villageSizeModifier);

    // 4jcraft added casts to u
    VillagePieces::StartPiece* startRoom = new VillagePieces::StartPiece(
        level->getBiomeSource(), 0, random, ((unsigned)chunkX << 4) + 2,
        ((unsigned)chunkZ << 4) + 2, pieceSet, villageSizeModifier, level);
    pieces.push_back(startRoom);
    startRoom->addChildren(startRoom, &pieces, random);

    std::vector<StructurePiece*>* pendingRoads = &startRoom->pendingRoads;
    std::vector<StructurePiece*>* pendingHouses = &startRoom->pendingHouses;
    while (!pendingRoads->empty() || !pendingHouses->empty()) {
        // prioritize roads
        if (pendingRoads->empty()) {
            int pos = random->nextInt((int)pendingHouses->size());
            AUTO_VAR(it, pendingHouses->begin() + pos);
            StructurePiece* structurePiece = *it;
            pendingHouses->erase(it);
            structurePiece->addChildren(startRoom, &pieces, random);
        } else {
            int pos = random->nextInt((int)pendingRoads->size());
            AUTO_VAR(it, pendingRoads->begin() + pos);
            StructurePiece* structurePiece = *it;
            pendingRoads->erase(it);
            structurePiece->addChildren(startRoom, &pieces, random);
        }
    }

    calculateBoundingBox();

    int count = 0;
    for (AUTO_VAR(it, pieces.begin()); it != pieces.end(); it++) {
        StructurePiece* piece = *it;
        if (dynamic_cast<VillagePieces::VillageRoadPiece*>(piece) == NULL) {
            count++;
        }
    }
    valid = count > 2;
}

bool VillageFeature::VillageStart::isValid() {
    // 4J-PB - Adding a bounds check to ensure a village isn't over the edge of
    // our world - we end up with half houses in that case
    if ((boundingBox->x0 < (-m_iXZSize / 2)) ||
        (boundingBox->x1 > (m_iXZSize / 2)) ||
        (boundingBox->z0 < (-m_iXZSize / 2)) ||
        (boundingBox->z1 > (m_iXZSize / 2))) {
        valid = false;
    }
    return valid;
}