src/main/java/ftbsc/bscv/modules/motion/VanillaFlight.java


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package ftbsc.bscv.modules.motion;

import com.mojang.brigadier.CommandDispatcher;

import ftbsc.bscv.BoSCoVicino;
import ftbsc.bscv.ICommons;
import ftbsc.bscv.modules.QuickModule;
import ftbsc.bscv.tools.Setting;
import net.minecraft.client.entity.player.ClientPlayerEntity;
import net.minecraft.command.CommandSource;
import net.minecraft.network.play.client.CPlayerPacket;
import net.minecraft.util.math.vector.Vector3d;
import net.minecraftforge.common.ForgeConfigSpec;
import net.minecraftforge.event.TickEvent;
import net.minecraftforge.event.TickEvent.Phase;
import net.minecraftforge.eventbus.api.SubscribeEvent;

public class VanillaFlight extends QuickModule implements ICommons {
   @Override
   public String getName() {
      return "VanillaFlight";
   }

   @Override
   public Group getGroup() {
      return Group.MOTION;
   }

   @Override
   protected int getDefaultKey() {
      return UNBOUND;
   }

   public final ForgeConfigSpec.ConfigValue<Boolean> force;
   public final ForgeConfigSpec.ConfigValue<Double>  speed;
   public final ForgeConfigSpec.ConfigValue<Boolean> antikick;
   public final ForgeConfigSpec.ConfigValue<Double>  antikick_magnitude;
   public final ForgeConfigSpec.ConfigValue<Integer> antikick_cycle;

   private int tick = 0;

   public VanillaFlight() {
      super();

      this.force = Setting.Bool.builder()
         .name("force")
         .comment("force enable flight on user")
         .fallback(false)
         .build(this);

      this.speed = Setting.Decimal.builder()
         .min(0.)
         .fallback(0.05)
         .name("speed")
         .comment("flight speed to set")
         .build(this);

      this.antikick = Setting.Bool.builder()
         .fallback(false)
         .name("antikick")
         .comment("prevent vanilla flight kick by descending")
         .build(this);

      this.antikick_magnitude = Setting.Decimal.builder()
         .min(0.)
         .fallback(1.)
         .name("magnitude")
         .comment("magnitude of antikick push")
         .build(this);

      this.antikick_cycle = Setting.Number.builder()
         .min(0)
         .max(79)
         .fallback(0)
         .name("cycle")
         .comment("how often to run antikick routine")
         .build(this);
   }

   private boolean couldFlyBefore = false;
   private float flyingSpeedBefore = 0.05f;

   @SubscribeEvent
   public void onTick(TickEvent.ClientTickEvent event) {
      if (event.phase == Phase.END) return;
      if (MC.player == null) return;

      MC.player.abilities.mayfly = true;
      MC.player.abilities.setFlyingSpeed(this.speed.get().floatValue());
      if (this.force.get()) {
         MC.player.abilities.flying = true;
      }
      if (this.antikick.get() && MC.player.abilities.flying) {
         this.tick = ( this.tick + 1 ) % this.antikick_cycle.get();
         if (this.tick == 0) {
            Vector3d pos = MC.player.position();
            BoSCoVicino.log("[*] antikick");
            MC.player.connection.send(
               new CPlayerPacket.PositionPacket(pos.x, pos.y - this.antikick_magnitude.get(), pos.z, false)
            );
            MC.player.setPos(pos.x, pos.y - this.antikick_magnitude.get(), pos.z);
         }
      } else {
       this.tick = 0; // reset antikick counter
      }
   }

   @Override
   protected void onEnabled() {
      this.tick = 0;
      if (MC.player != null) {
         this.couldFlyBefore = MC.player.abilities.mayfly;
         this.flyingSpeedBefore = MC.player.abilities.getFlyingSpeed();
         BoSCoVicino.log(String.format("Flying speed before = %f", this.flyingSpeedBefore));
      }
   }

   @Override
   protected void onDisabled() {
      ClientPlayerEntity player = MC.player;
      if (player != null) {
         player.abilities.mayfly = this.couldFlyBefore;
         player.abilities.setFlyingSpeed(this.flyingSpeedBefore);
         if (this.force.get()) {
            player.abilities.flying = false;
         }
      }
   }
}