cn.nukkit.block.BlockGrass Maven / Gradle / Ivy
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A Minecraft Bedrock Edition server software implementation made in Java from scratch which supports all new features.
package cn.nukkit.block;
import cn.nukkit.Player;
import cn.nukkit.Server;
import cn.nukkit.api.PowerNukkitDifference;
import cn.nukkit.api.PowerNukkitOnly;
import cn.nukkit.api.Since;
import cn.nukkit.blockproperty.BlockProperties;
import cn.nukkit.blockproperty.CommonBlockProperties;
import cn.nukkit.blockproperty.exception.InvalidBlockPropertyValueException;
import cn.nukkit.blockproperty.value.DirtType;
import cn.nukkit.event.block.BlockFadeEvent;
import cn.nukkit.event.block.BlockSpreadEvent;
import cn.nukkit.item.Item;
import cn.nukkit.level.Level;
import cn.nukkit.level.Sound;
import cn.nukkit.level.generator.object.ObjectTallGrass;
import cn.nukkit.level.particle.BoneMealParticle;
import cn.nukkit.math.NukkitRandom;
import cn.nukkit.math.Vector3;
import cn.nukkit.utils.BlockColor;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.util.Optional;
import java.util.concurrent.ThreadLocalRandom;
/**
* @author Angelic47 (Nukkit Project)
*/
public class BlockGrass extends BlockDirt {
public BlockGrass() {
this(0);
}
public BlockGrass(int meta) {
// Grass can't have meta.
super(0);
}
@Since("1.4.0.0-PN")
@PowerNukkitOnly
@Nonnull
@Override
public BlockProperties getProperties() {
return CommonBlockProperties.EMPTY_PROPERTIES;
}
@Override
public int getId() {
return GRASS;
}
@Override
public double getHardness() {
return 0.6;
}
@Override
public double getResistance() {
return 3;
}
@Override
public String getName() {
return "Grass Block";
}
@Since("1.4.0.0-PN")
@PowerNukkitOnly
@Nonnull
@Override
public Optional getDirtType() {
return Optional.empty();
}
@Since("1.4.0.0-PN")
@PowerNukkitOnly
@Override
public void setDirtType(@Nullable DirtType dirtType) {
if (dirtType != null) {
throw new InvalidBlockPropertyValueException(DIRT_TYPE, null, dirtType, getName()+" don't support DirtType");
}
}
@Override
public boolean onActivate(@Nonnull Item item) {
return this.onActivate(item, null);
}
@Override
public boolean onActivate(@Nonnull Item item, Player player) {
if (item.isFertilizer()) {
if (player != null && (player.gamemode & 0x01) == 0) {
item.count--;
}
this.level.addParticle(new BoneMealParticle(this));
ObjectTallGrass.growGrass(this.getLevel(), this, new NukkitRandom());
return true;
} else if (item.isHoe()) {
item.useOn(this);
this.getLevel().setBlock(this, Block.get(BlockID.FARMLAND));
if(player != null){
player.getLevel().addSound(player, Sound.USE_GRASS);
}
return true;
} else if (item.isShovel()) {
item.useOn(this);
this.getLevel().setBlock(this, Block.get(BlockID.GRASS_PATH));
if(player != null){
player.getLevel().addSound(player, Sound.USE_GRASS);
}
return true;
}
return false;
}
@PowerNukkitDifference(since = "1.4.0.0-PN", info = "Fixed grass spread and decay logic to match vanilla behaviour")
@Override
public int onUpdate(int type) {
if (type == Level.BLOCK_UPDATE_RANDOM) {
// Grass dies and changes to dirt after a random time (when a random tick lands on the block)
// if directly covered by any opaque block.
// Transparent blocks can kill grass in a similar manner,
// but only if they cause the light level above the grass block to be four or below (like water does),
// and the surrounding area is not otherwise sufficiently lit up.
if (up().getLightFilter() > 1) {
BlockFadeEvent ev = new BlockFadeEvent(this, Block.get(BlockID.DIRT));
Server.getInstance().getPluginManager().callEvent(ev);
if (!ev.isCancelled()) {
this.getLevel().setBlock(this, ev.getNewState());
return type;
}
}
// Grass can spread to nearby dirt blocks.
// Grass spreading without player intervention depends heavily on the time of day.
// For a dirt block to accept grass from a nearby grass block, the following requirements must be met:
// The source block must have a light level of 9 or brighter directly above it.
if (getLevel().getFullLight(add(0, 1, 0)) >= BlockCrops.MINIMUM_LIGHT_LEVEL) {
// The dirt block receiving grass must be within a 3×5×3 range of the source block
// where the source block is in the center of the second topmost layer of that range.
ThreadLocalRandom random = ThreadLocalRandom.current();
int x = random.nextInt((int) this.x - 1, (int) this.x + 1 + 1);
int y = random.nextInt((int) this.y - 3, (int) this.y + 1 + 1);
int z = random.nextInt((int) this.z - 1, (int) this.z + 1 + 1);
Block block = this.getLevel().getBlock(new Vector3(x, y, z));
if (block.getId() == Block.DIRT
// It cannot spread to coarse dirt
&& block.getPropertyValue(DIRT_TYPE) == DirtType.NORMAL
// The dirt block must have a light level of at least 4 above it.
&& getLevel().getFullLight(block) >= 4
// Any block directly above the dirt block must not reduce light by 2 levels or more.
&& block.up().getLightFilter() < 2) {
BlockSpreadEvent ev = new BlockSpreadEvent(block, this, Block.get(BlockID.GRASS));
Server.getInstance().getPluginManager().callEvent(ev);
if (!ev.isCancelled()) {
this.getLevel().setBlock(block, ev.getNewState());
}
}
}
return type;
}
return 0;
}
@Override
public BlockColor getColor() {
return BlockColor.GRASS_BLOCK_COLOR;
}
@Override
public boolean canSilkTouch() {
return true;
}
}