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


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package ftbsc.bscv.modules.motion;

import com.google.auto.service.AutoService;
import ftbsc.bscv.ICommons;
import ftbsc.bscv.api.ILoadable;
import ftbsc.bscv.modules.QuickModule;
import ftbsc.bscv.tools.Setting;
import net.minecraft.client.entity.player.ClientPlayerEntity;
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;

@AutoService(ILoadable.class)
public class VanillaFlight extends QuickModule implements ICommons {

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

   private enum AntikickMode {
      NONE,
      PACKET,
      FORCED
   }

   public final ForgeConfigSpec.ConfigValue<Boolean> force;
   public final ForgeConfigSpec.ConfigValue<Double>  speed;
   public final ForgeConfigSpec.ConfigValue<AntikickMode> 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.Switch.builder(AntikickMode.class)
         .fallback(AntikickMode.NONE)
         .name("antikick")
         .comment("prevent vanilla flight kick by descending")
         .build(this);

      this.antikick_magnitude = Setting.Decimal.builder()
         .min(0.)
         .fallback(0.032)
         .name("magnitude")
         .comment("magnitude of antikick push")
         .build(this);

      this.antikick_cycle = Setting.Number.builder()
         .min(1)
         .max(80)
         .fallback(70)
         .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;
      }

      this.tick = ( this.tick + 1 ) % this.antikick_cycle.get();
      Vector3d pos = MC.player.position();

      if (this.tick == 0) {
         switch (this.antikick.get()) {
            case PACKET:
               MC.player.connection.send(
                  new CPlayerPacket.PositionPacket(pos.x, pos.y - this.antikick_magnitude.get(), pos.z, false)
               );
               break;
            case FORCED:
               MC.player.setPos(pos.x, pos.y - this.antikick_magnitude.get(), pos.z);
               break;
            case NONE:
               break;
         }
      }
   }

   @Override
   public void enable() {
      super.enable();
      this.tick = 0;
      if (MC.player != null) {
         this.couldFlyBefore = MC.player.abilities.mayfly;
         this.flyingSpeedBefore = MC.player.abilities.getFlyingSpeed();
      }
   }

   @Override
   public void disable() {
      super.disable();
      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;
         }
      }
   }
}