minecraft-src/net/minecraft/server/commands/ParticleCommand.java

package net.minecraft.server.commands;

import com.mojang.brigadier.CommandDispatcher;
import com.mojang.brigadier.arguments.FloatArgumentType;
import com.mojang.brigadier.arguments.IntegerArgumentType;
import com.mojang.brigadier.exceptions.CommandSyntaxException;
import com.mojang.brigadier.exceptions.SimpleCommandExceptionType;
import java.util.Collection;
import net.minecraft.commands.CommandBuildContext;
import net.minecraft.commands.CommandSourceStack;
import net.minecraft.commands.Commands;
import net.minecraft.commands.arguments.EntityArgument;
import net.minecraft.commands.arguments.ParticleArgument;
import net.minecraft.commands.arguments.coordinates.Vec3Argument;
import net.minecraft.core.particles.ParticleOptions;
import net.minecraft.core.registries.BuiltInRegistries;
import net.minecraft.network.chat.Component;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.world.phys.Vec3;

public class ParticleCommand {
	private static final SimpleCommandExceptionType ERROR_FAILED = new SimpleCommandExceptionType(Component.translatable("commands.particle.failed"));

	public static void register(CommandDispatcher<CommandSourceStack> dispatcher, CommandBuildContext context) {
		dispatcher.register(
			Commands.literal("particle")
				.requires(commandSourceStack -> commandSourceStack.hasPermission(2))
				.then(
					Commands.argument("name", ParticleArgument.particle(context))
						.executes(
							commandContext -> sendParticles(
								commandContext.getSource(),
								ParticleArgument.getParticle(commandContext, "name"),
								commandContext.getSource().getPosition(),
								Vec3.ZERO,
								0.0F,
								0,
								false,
								commandContext.getSource().getServer().getPlayerList().getPlayers()
							)
						)
						.then(
							Commands.argument("pos", Vec3Argument.vec3())
								.executes(
									commandContext -> sendParticles(
										commandContext.getSource(),
										ParticleArgument.getParticle(commandContext, "name"),
										Vec3Argument.getVec3(commandContext, "pos"),
										Vec3.ZERO,
										0.0F,
										0,
										false,
										commandContext.getSource().getServer().getPlayerList().getPlayers()
									)
								)
								.then(
									Commands.argument("delta", Vec3Argument.vec3(false))
										.then(
											Commands.argument("speed", FloatArgumentType.floatArg(0.0F))
												.then(
													Commands.argument("count", IntegerArgumentType.integer(0))
														.executes(
															commandContext -> sendParticles(
																commandContext.getSource(),
																ParticleArgument.getParticle(commandContext, "name"),
																Vec3Argument.getVec3(commandContext, "pos"),
																Vec3Argument.getVec3(commandContext, "delta"),
																FloatArgumentType.getFloat(commandContext, "speed"),
																IntegerArgumentType.getInteger(commandContext, "count"),
																false,
																commandContext.getSource().getServer().getPlayerList().getPlayers()
															)
														)
														.then(
															Commands.literal("force")
																.executes(
																	commandContext -> sendParticles(
																		commandContext.getSource(),
																		ParticleArgument.getParticle(commandContext, "name"),
																		Vec3Argument.getVec3(commandContext, "pos"),
																		Vec3Argument.getVec3(commandContext, "delta"),
																		FloatArgumentType.getFloat(commandContext, "speed"),
																		IntegerArgumentType.getInteger(commandContext, "count"),
																		true,
																		commandContext.getSource().getServer().getPlayerList().getPlayers()
																	)
																)
																.then(
																	Commands.argument("viewers", EntityArgument.players())
																		.executes(
																			commandContext -> sendParticles(
																				commandContext.getSource(),
																				ParticleArgument.getParticle(commandContext, "name"),
																				Vec3Argument.getVec3(commandContext, "pos"),
																				Vec3Argument.getVec3(commandContext, "delta"),
																				FloatArgumentType.getFloat(commandContext, "speed"),
																				IntegerArgumentType.getInteger(commandContext, "count"),
																				true,
																				EntityArgument.getPlayers(commandContext, "viewers")
																			)
																		)
																)
														)
														.then(
															Commands.literal("normal")
																.executes(
																	commandContext -> sendParticles(
																		commandContext.getSource(),
																		ParticleArgument.getParticle(commandContext, "name"),
																		Vec3Argument.getVec3(commandContext, "pos"),
																		Vec3Argument.getVec3(commandContext, "delta"),
																		FloatArgumentType.getFloat(commandContext, "speed"),
																		IntegerArgumentType.getInteger(commandContext, "count"),
																		false,
																		commandContext.getSource().getServer().getPlayerList().getPlayers()
																	)
																)
																.then(
																	Commands.argument("viewers", EntityArgument.players())
																		.executes(
																			commandContext -> sendParticles(
																				commandContext.getSource(),
																				ParticleArgument.getParticle(commandContext, "name"),
																				Vec3Argument.getVec3(commandContext, "pos"),
																				Vec3Argument.getVec3(commandContext, "delta"),
																				FloatArgumentType.getFloat(commandContext, "speed"),
																				IntegerArgumentType.getInteger(commandContext, "count"),
																				false,
																				EntityArgument.getPlayers(commandContext, "viewers")
																			)
																		)
																)
														)
												)
										)
								)
						)
				)
		);
	}

	private static int sendParticles(
		CommandSourceStack source, ParticleOptions particleData, Vec3 pos, Vec3 delta, float speed, int count, boolean force, Collection<ServerPlayer> viewers
	) throws CommandSyntaxException {
		int i = 0;

		for (ServerPlayer serverPlayer : viewers) {
			if (source.getLevel().sendParticles(serverPlayer, particleData, force, false, pos.x, pos.y, pos.z, count, delta.x, delta.y, delta.z, speed)) {
				i++;
			}
		}

		if (i == 0) {
			throw ERROR_FAILED.create();
		} else {
			source.sendSuccess(
				() -> Component.translatable("commands.particle.success", BuiltInRegistries.PARTICLE_TYPE.getKey(particleData.getType()).toString()), true
			);
			return i;
		}
	}
}