4jcraft/Minecraft.World/Blocks/TopSnowTile.cpp

#include "../Platform/stdafx.h"
#include "../Headers/net.minecraft.stats.h"
#include "../Headers/net.minecraft.world.entity.player.h"
#include "../Headers/net.minecraft.world.entity.item.h"
#include "../Headers/net.minecraft.world.item.h"
#include "../Headers/net.minecraft.world.level.h"
#include "../Headers/net.minecraft.world.phys.h"
#include "../Headers/net.minecraft.world.h"
#include "TopSnowTile.h"

const int TopSnowTile::MAX_HEIGHT = 6;
const int TopSnowTile::HEIGHT_MASK = 7;  // max 8 steps

TopSnowTile::TopSnowTile(int id) : Tile(id, Material::topSnow, false) {
    setShape(0, 0, 0, 1, 2 / 16.0f, 1);
    setTicking(true);
    updateShape(0);
}

void TopSnowTile::registerIcons(IconRegister* iconRegister) {
    icon = iconRegister->registerIcon(L"snow");
}

std::optional<AABB> TopSnowTile::getAABB(Level* level, int x, int y, int z) {
    int height = level->getData(x, y, z) & HEIGHT_MASK;
    float offset = 2.0f / SharedConstants::WORLD_RESOLUTION;
    ThreadStorage* tls = m_tlsShape;
    return AABB(x + tls->xx0, y + tls->yy0, z + tls->zz0, x + tls->xx1,
                         y + (height * offset), z + tls->zz1);
}

float TopSnowTile::getHeight(Level* level, int x, int y, int z) {
    int height = level->getData(x, y, z) & HEIGHT_MASK;
    return 2 * (1 + height) / 16.0f;
}

bool TopSnowTile::blocksLight() { return false; }

bool TopSnowTile::isSolidRender(bool isServerLevel) { return false; }

bool TopSnowTile::isCubeShaped() { return false; }

void TopSnowTile::updateDefaultShape() { updateShape(0); }

void TopSnowTile::updateShape(
    LevelSource* level, int x, int y, int z, int forceData,
    std::shared_ptr<TileEntity>
        forceEntity)  // 4J added forceData, forceEntity param
{
    updateShape(level->getData(x, y, z));
}

void TopSnowTile::updateShape(int data) {
    int height = data & HEIGHT_MASK;
    float o = 2 * (1 + height) / 16.0f;
    setShape(0, 0, 0, 1, o, 1);
}

bool TopSnowTile::mayPlace(Level* level, int x, int y, int z) {
    int t = level->getTile(x, y - 1, z);
    if (t == 0) return false;
    if (t == id &&
        (level->getData(x, y - 1, z) & HEIGHT_MASK) == MAX_HEIGHT + 1)
        return true;
    // 4J Stu - Assume when placing that this is the server level and we don't
    // care how it's going to be rendered Fix for #9407 - Gameplay: Destroying a
    // block of snow on top of trees, removes any adjacent snow.
    if (t != Tile::leaves_Id && !Tile::tiles[t]->isSolidRender(true))
        return false;
    return level->getMaterial(x, y - 1, z)->blocksMotion();
}

void TopSnowTile::neighborChanged(Level* level, int x, int y, int z, int type) {
    checkCanSurvive(level, x, y, z);
}

bool TopSnowTile::checkCanSurvive(Level* level, int x, int y, int z) {
    if (!mayPlace(level, x, y, z)) {
        spawnResources(level, x, y, z, level->getData(x, y, z), 0);
        level->removeTile(x, y, z);
        return false;
    }
    return true;
}

void TopSnowTile::playerDestroy(Level* level, std::shared_ptr<Player> player,
                                int x, int y, int z, int data) {
    int type = Item::snowBall->id;
    int height = data & HEIGHT_MASK;
    popResource(
        level, x, y, z,
        std::shared_ptr<ItemInstance>(new ItemInstance(type, height + 1, 0)));
    level->removeTile(x, y, z);
}

int TopSnowTile::getResource(int data, Random* random, int playerBonusLevel) {
    return Item::snowBall->id;
}

int TopSnowTile::getResourceCount(Random* random) { return 0; }

void TopSnowTile::tick(Level* level, int x, int y, int z, Random* random) {
    if (level->getBrightness(LightLayer::Block, x, y, z) > 11) {
        spawnResources(level, x, y, z, level->getData(x, y, z), 0);
        level->removeTile(x, y, z);
    }
}

bool TopSnowTile::shouldRenderFace(LevelSource* level, int x, int y, int z,
                                   int face) {
    if (face == 1) return true;
    // 4J - don't render faces if neighbouring tiles are also TopSnowTile with
    // at least the same height as this one Otherwise we get horrible artifacts
    // from the non-manifold geometry created. Fixes bug #8506
    if ((level->getTile(x, y, z) == Tile::topSnow_Id) && (face >= 2)) {
        int h0 = level->getData(x, y, z) & HEIGHT_MASK;
        int xx = x;
        int yy = y;
        int zz = z;
        // Work out coords of tile who's face we're considering (rather than
        // it's neighbour which is passed in here as x,y,z already offsetting by
        // the face direction)
        switch (face) {
            case 2:
                zz += 1;
                break;
            case 3:
                zz -= 1;
                break;
            case 4:
                xx += 1;
                break;
            case 5:
                xx -= 1;
                break;
            default:
                break;
        }
        int h1 = level->getData(xx, yy, zz) & HEIGHT_MASK;
        if (h0 >= h1) return false;
    }
    return Tile::shouldRenderFace(level, x, y, z, face);
}

bool TopSnowTile::shouldTileTick(Level* level, int x, int y, int z) {
    return level->getBrightness(LightLayer::Block, x, y, z) > 11;
}