minecraft-src/net/minecraft/world/level/block/entity/EnchantingTableBlockEntity.java

package net.minecraft.world.level.block.entity;

import net.minecraft.core.BlockPos;
import net.minecraft.core.HolderLookup;
import net.minecraft.core.component.DataComponents;
import net.minecraft.core.component.DataComponentMap.Builder;
import net.minecraft.nbt.CompoundTag;
import net.minecraft.network.chat.Component;
import net.minecraft.util.Mth;
import net.minecraft.util.RandomSource;
import net.minecraft.world.Nameable;
import net.minecraft.world.entity.player.Player;
import net.minecraft.world.level.Level;
import net.minecraft.world.level.block.state.BlockState;
import org.jetbrains.annotations.Nullable;

public class EnchantingTableBlockEntity extends BlockEntity implements Nameable {
	public int time;
	public float flip;
	public float oFlip;
	public float flipT;
	public float flipA;
	public float open;
	public float oOpen;
	public float rot;
	public float oRot;
	public float tRot;
	private static final RandomSource RANDOM = RandomSource.create();
	@Nullable
	private Component name;

	public EnchantingTableBlockEntity(BlockPos pos, BlockState state) {
		super(BlockEntityType.ENCHANTING_TABLE, pos, state);
	}

	@Override
	protected void saveAdditional(CompoundTag tag, HolderLookup.Provider registries) {
		super.saveAdditional(tag, registries);
		if (this.hasCustomName()) {
			tag.putString("CustomName", Component.Serializer.toJson(this.name, registries));
		}
	}

	@Override
	protected void loadAdditional(CompoundTag tag, HolderLookup.Provider registries) {
		super.loadAdditional(tag, registries);
		if (tag.contains("CustomName", 8)) {
			this.name = parseCustomNameSafe(tag.getString("CustomName"), registries);
		}
	}

	public static void bookAnimationTick(Level level, BlockPos pos, BlockState state, EnchantingTableBlockEntity enchantingTable) {
		enchantingTable.oOpen = enchantingTable.open;
		enchantingTable.oRot = enchantingTable.rot;
		Player player = level.getNearestPlayer(pos.getX() + 0.5, pos.getY() + 0.5, pos.getZ() + 0.5, 3.0, false);
		if (player != null) {
			double d = player.getX() - (pos.getX() + 0.5);
			double e = player.getZ() - (pos.getZ() + 0.5);
			enchantingTable.tRot = (float)Mth.atan2(e, d);
			enchantingTable.open += 0.1F;
			if (enchantingTable.open < 0.5F || RANDOM.nextInt(40) == 0) {
				float f = enchantingTable.flipT;

				do {
					enchantingTable.flipT = enchantingTable.flipT + (RANDOM.nextInt(4) - RANDOM.nextInt(4));
				} while (f == enchantingTable.flipT);
			}
		} else {
			enchantingTable.tRot += 0.02F;
			enchantingTable.open -= 0.1F;
		}

		while (enchantingTable.rot >= (float) Math.PI) {
			enchantingTable.rot -= (float) (Math.PI * 2);
		}

		while (enchantingTable.rot < (float) -Math.PI) {
			enchantingTable.rot += (float) (Math.PI * 2);
		}

		while (enchantingTable.tRot >= (float) Math.PI) {
			enchantingTable.tRot -= (float) (Math.PI * 2);
		}

		while (enchantingTable.tRot < (float) -Math.PI) {
			enchantingTable.tRot += (float) (Math.PI * 2);
		}

		float g = enchantingTable.tRot - enchantingTable.rot;

		while (g >= (float) Math.PI) {
			g -= (float) (Math.PI * 2);
		}

		while (g < (float) -Math.PI) {
			g += (float) (Math.PI * 2);
		}

		enchantingTable.rot += g * 0.4F;
		enchantingTable.open = Mth.clamp(enchantingTable.open, 0.0F, 1.0F);
		enchantingTable.time++;
		enchantingTable.oFlip = enchantingTable.flip;
		float h = (enchantingTable.flipT - enchantingTable.flip) * 0.4F;
		float i = 0.2F;
		h = Mth.clamp(h, -0.2F, 0.2F);
		enchantingTable.flipA = enchantingTable.flipA + (h - enchantingTable.flipA) * 0.9F;
		enchantingTable.flip = enchantingTable.flip + enchantingTable.flipA;
	}

	@Override
	public Component getName() {
		return (Component)(this.name != null ? this.name : Component.translatable("container.enchant"));
	}

	public void setCustomName(@Nullable Component customName) {
		this.name = customName;
	}

	@Nullable
	@Override
	public Component getCustomName() {
		return this.name;
	}

	@Override
	protected void applyImplicitComponents(BlockEntity.DataComponentInput componentInput) {
		super.applyImplicitComponents(componentInput);
		this.name = componentInput.get(DataComponents.CUSTOM_NAME);
	}

	@Override
	protected void collectImplicitComponents(Builder components) {
		super.collectImplicitComponents(components);
		components.set(DataComponents.CUSTOM_NAME, this.name);
	}

	@Override
	public void removeComponentsFromTag(CompoundTag tag) {
		tag.remove("CustomName");
	}
}