4jcraft/Minecraft.World/WorldGen/Structures/StructureStart.cpp

#include "../../Platform/stdafx.h"
#include "../../Headers/net.minecraft.world.level.h"
#include "StructureStart.h"
#include "StructurePiece.h"
#include "../../Util/BoundingBox.h"

StructureStart::StructureStart() {
    boundingBox = NULL;  // 4J added initialiser
}

StructureStart::~StructureStart() {
    for (AUTO_VAR(it, pieces.begin()); it != pieces.end(); it++) {
        delete (*it);
    }
    delete boundingBox;
}

BoundingBox* StructureStart::getBoundingBox() { return boundingBox; }

std::list<StructurePiece*>* StructureStart::getPieces() { return &pieces; }

void StructureStart::postProcess(Level* level, Random* random,
                                 BoundingBox* chunkBB) {
    AUTO_VAR(it, pieces.begin());

    while (it != pieces.end()) {
        if ((*it)->getBoundingBox()->intersects(chunkBB) &&
            !(*it)->postProcess(level, random, chunkBB)) {
            // this piece can't be placed, so remove it to avoid future
            // attempts
            it = pieces.erase(it);
        } else {
            it++;
        }
    }
}

void StructureStart::calculateBoundingBox() {
    boundingBox = BoundingBox::getUnknownBox();

    for (AUTO_VAR(it, pieces.begin()); it != pieces.end(); it++) {
        StructurePiece* piece = *it;
        boundingBox->expand(piece->getBoundingBox());
    }
}

void StructureStart::moveBelowSeaLevel(Level* level, Random* random,
                                       int offset) {
    const int MAX_Y = level->seaLevel - offset;

    // set lowest possible position (at bedrock)
    int y1Pos = boundingBox->getYSpan() + 1;
    // move up randomly within the available span
    if (y1Pos < MAX_Y) {
        y1Pos += random->nextInt(MAX_Y - y1Pos);
    }

    // move all bounding boxes
    int dy = y1Pos - boundingBox->y1;
    boundingBox->move(0, dy, 0);
    for (AUTO_VAR(it, pieces.begin()); it != pieces.end(); it++) {
        StructurePiece* piece = *it;
        piece->getBoundingBox()->move(0, dy, 0);
    }
}

void StructureStart::moveInsideHeights(Level* level, Random* random,
                                       int lowestAllowed, int highestAllowed) {
    int heightSpan =
        highestAllowed - lowestAllowed + 1 - boundingBox->getYSpan();
    int y0Pos = 1;

    if (heightSpan > 1) {
        y0Pos = lowestAllowed + random->nextInt(heightSpan);
    } else {
        y0Pos = lowestAllowed;
    }

    // move all bounding boxes
    int dy = y0Pos - boundingBox->y0;
    boundingBox->move(0, dy, 0);
    for (AUTO_VAR(it, pieces.begin()); it != pieces.end(); it++) {
        StructurePiece* piece = *it;
        piece->getBoundingBox()->move(0, dy, 0);
    }
}

bool StructureStart::isValid() { return true; }