NaturesAura/src/main/java/de/ellpeck/naturesaura/packet/PacketParticles.java

package de.ellpeck.naturesaura.packet;

import de.ellpeck.naturesaura.NaturesAura;
import io.netty.buffer.ByteBuf;
import net.minecraft.client.Minecraft;
import net.minecraftforge.fml.common.network.simpleimpl.IMessage;
import net.minecraftforge.fml.common.network.simpleimpl.IMessageHandler;
import net.minecraftforge.fml.common.network.simpleimpl.MessageContext;
import net.minecraftforge.fml.relauncher.Side;
import net.minecraftforge.fml.relauncher.SideOnly;
import org.lwjgl.util.vector.Vector3f;

public class PacketParticles implements IMessage {

    private float startX;
    private float startY;
    private float startZ;

    private float endX;
    private float endY;
    private float endZ;

    private float speed;
    private int color;
    private float scale;

    public PacketParticles(float startX, float startY, float startZ, float endX, float endY, float endZ, float speed, int color, float scale) {
        this.startX = startX;
        this.startY = startY;
        this.startZ = startZ;
        this.endX = endX;
        this.endY = endY;
        this.endZ = endZ;
        this.speed = speed;
        this.color = color;
        this.scale = scale;
    }

    public PacketParticles() {

    }

    @Override
    public void fromBytes(ByteBuf buf) {
        this.startX = buf.readFloat();
        this.startY = buf.readFloat();
        this.startZ = buf.readFloat();
        this.endX = buf.readFloat();
        this.endY = buf.readFloat();
        this.endZ = buf.readFloat();
        this.speed = buf.readFloat();
        this.color = buf.readInt();
        this.scale = buf.readFloat();
    }

    @Override
    public void toBytes(ByteBuf buf) {
        buf.writeFloat(this.startX);
        buf.writeFloat(this.startY);
        buf.writeFloat(this.startZ);
        buf.writeFloat(this.endX);
        buf.writeFloat(this.endY);
        buf.writeFloat(this.endZ);
        buf.writeFloat(this.speed);
        buf.writeInt(this.color);
        buf.writeFloat(this.scale);
    }

    public static class Handler implements IMessageHandler<PacketParticles, IMessage> {

        @Override
        @SideOnly(Side.CLIENT)
        public IMessage onMessage(PacketParticles message, MessageContext ctx) {
            NaturesAura.proxy.scheduleTask(() -> {
                Vector3f dir = new Vector3f(
                        message.endX - message.startX,
                        message.endY - message.startY,
                        message.endZ - message.startZ);
                int maxAge = (int) (dir.length() / message.speed);
                dir.normalise();

                NaturesAura.proxy.spawnMagicParticle(Minecraft.getMinecraft().world,
                        message.startX, message.startY, message.startZ,
                        dir.x * message.speed, dir.y * message.speed, dir.z * message.speed,
                        message.color, message.scale, maxAge, 0F, false, false);
            });

            return null;
        }
    }
}