Converting mods from Fabric to Forge

[Samv2005]

I'm trying to convert the Expanded Origins addon (https://www.curseforge.com/minecraft/mc-mods/origins-plus) from Fabric to Forge for the Monke origin, but I'm having some trouble with it, as I know next to nothing about programming. So far, what I did was move most of the files from Expanded Origins to a forge Origins addon that I almost completely cleared out, since a good chunk of the code is identical. This kind of worked, as most of the abilities stuck around, but the main ability (grappling) won't work since it requires a few .CLASS files that aren't coded the same way forge is. After finding what I believe to be one of the main files for the grapple, I compared the files for forge Origins to the files for fabric Origins, and found that the key difference was that in the lines with "import net.minecraft.class_xxxx", the "class_xxxx" was replaced with the forge counterpart (usually entity.something, util.something, or network.something). This was also true for field_xxxx and method_xxxx. Currently, my main issue is that I can't test the changes since in order to edit the code, I had to convert it to .java, and now whenever I try to convert it back to .CLASS, it gives me this error message:

Spoiler

r2.java:11: error: class, interface, or enum expected
package com.github.originsplus.power;
^
r2.java:13: error: class, interface, or enum expected
import com.github.originsplus.entity.IGrappleHook;
^
r2.java:14: error: class, interface, or enum expected
import io.github.apace100.origins.power.ActiveCooldownPower;
^
r2.java:15: error: class, interface, or enum expected
import io.github.apace100.origins.power.PowerType;
^
r2.java:16: error: class, interface, or enum expected
import io.github.apace100.origins.util.HudRender;
^
r2.java:17: error: class, interface, or enum expected
import net.minecraft.entity.Entity;
^
r2.java:18: error: class, interface, or enum expected
import net.minecraft.entity.projectile.FishingBobberEntity;
^
r2.java:19: error: class, interface, or enum expected
import net.minecraft.entity.player.PlayerEntity;
^
r2.java:20: error: class, interface, or enum expected
import net.minecraft.util.math.vector.Vector3d;
^
r2.java:21: error: class, interface, or enum expected
import net.minecraft.network.Packet;
^
r2.java:22: error: class, interface, or enum expected
import net.minecraft.network.packet.s2c.play.EntityVelocityUpdateS2CPacket;
^
r2.java:23: error: class, interface, or enum expected
import net.minecraft.entity.player.ServerPlayerEntity;
^
r2.java:24: error: class, interface, or enum expected
import net.minecraft.util.SoundEvent;
^
r2.java:25: error: class, interface, or enum expected
import net.minecraft.util.SoundCategory;
^
14 errors

I am using Eclipse IDE to edit the files. Also this is the code I am trying to convert, followed by the edited mod:

Spoiler

public class r {

    public static void main(String[] args) {
        //Printing Hello World    
        System.out.println("This is HelloWorld! example");

    }

}
package com.github.originsplus.power;

import com.github.originsplus.entity.IGrappleHook;
import io.github.apace100.origins.power.ActiveCooldownPower;
import io.github.apace100.origins.power.PowerType;
import io.github.apace100.origins.util.HudRender;
import net.minecraft.entity.Entity;
import net.minecraft.entity.projectile.FishingBobberEntity;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.util.math.vector.Vector3d;
import net.minecraft.network.Packet;
import net.minecraft.network.packet.s2c.play.EntityVelocityUpdateS2CPacket;
import net.minecraft.entity.player.ServerPlayerEntity;
import net.minecraft.util.SoundEvent;
import net.minecraft.util.SoundCategory;

public class GrapplePower extends ActiveCooldownPower {
    SoundEvent soundOnThrown;
  
    SoundEvent soundOnRetract;
  
  double strength;
  
  boolean thrown;
  
  FishingBobberEntity grappleHook;
  
  public GrapplePower(PowerType<?> type, PlayerEntity player, int cooldownDuration, HudRender hudRender, SoundEvent soundOnThrownEvent, SoundEvent soundOnRetractEvent, double strength) {
    super(type, player, cooldownDuration, hudRender, null);
    this.soundOnThrown = soundOnThrownEvent;
    this.soundOnRetract = soundOnRetractEvent;
    this.strength = strength;
    this.thrown = false;
  }
  
  public void onUse() {
    if (!this.player.field_70170_p.field_72995_K)
      if (this.thrown && !this.grappleHook.field_5988) {
        retractGrapple();
      } else if (canUse()) {
        throwGrapple();
        use();
      }  
  }
  
  private void throwGrapple() {
    if (this.soundOnThrown != null)
      this.player.field_70170_p.func_184148_a((PlayerEntity)null, this.player.func_226277_ct_(), this.player.func_226278_cu_(), this.player.func_226281_cx_(), this.soundOnThrown, SoundCategory.NEUTRAL, 0.5F, 0.4F / (this.player
          .func_70681_au().nextFloat() * 0.4F + 0.8F)); 
    FishingBobberEntity playerHook = this.player.field_7513;
    this.grappleHook = new FishingBobberEntity(this.player, this.player.field_70170_p, 0, 0);
    ((IGrappleHook)this.grappleHook).setGrapple(true);
    this.player.field_7513 = playerHook;
    this.player.field_70170_p.func_217376_c((Entity)this.grappleHook);
    this.thrown = true;
  }
  
  private void retractGrapple() {
    if (this.soundOnRetract != null)
      this.player.field_70170_p.func_184148_a((PowerType)null, this.player.func_226277_ct_(), this.player.func_226278_cu_(), this.player.func_226281_cx_(), this.soundOnRetract, SoundCategory.NEUTRAL, 0.5F, 0.4F / (this.player
          .func_70681_au().nextFloat() * 0.4F + 0.8F)); 
    Vector3d bobberPos = this.grappleHook.func_213303_ch();
    Vector3d distance = new Vector3d(bobberPos.field_72450_a - (this.player.func_213303_ch()).field_72450_a, bobberPos.field_72448_b - (this.player.func_213303_ch()).field_1351, bobberPos.field_72449_c - (this.player.func_213303_ch()).field_72449_c);
    distance = distance.func_72432_b();
    Vector3d velocity = new Vector3d(distance.field_72450_a * this.strength, distance.field_72448_b * this.strength, distance.field_72449_c * this.strength);
    Vector3d playerVelocity = this.player.func_213322_ci().func_178787_e(velocity);
    this.player.func_213317_d(playerVelocity);
    if (this.player instanceof ServerPlayerEntity) {
        ServerPlayerEntity serverPlayer = (ServerPlayerEntity)this.player;
      serverPlayer.field_13987.func_234923_W_((Packet)new EntityVelocityUpdateS2CPacket(this.player.method_5628(), playerVelocity));
    } 
    this.grappleHook.method_5768();
    this.thrown = false;
  }
}

mod:
https://www.dropbox.com/s/5447brs1zquzebw/Expanded Origins Forge.jar?dl=0

[Toityle]

On 7/3/2021 at 6:21 PM, Samv2005 said:

I'm trying to convert the Expanded Origins addon (https://www.curseforge.com/minecraft/mc-mods/origins-plus) from Fabric to Forge for the Monke origin, but I'm having some trouble with it, as I know next to nothing about programming. So far, what I did was move most of the files from Expanded Origins to a forge Origins addon that I almost completely cleared out, since a good chunk of the code is identical. This kind of worked, as most of the abilities stuck around, but the main ability (grappling) won't work since it requires a few .CLASS files that aren't coded the same way forge is. After finding what I believe to be one of the main files for the grapple, I compared the files for forge Origins to the files for fabric Origins, and found that the key difference was that in the lines with "import net.minecraft.class_xxxx", the "class_xxxx" was replaced with the forge counterpart (usually entity.something, util.something, or network.something). This was also true for field_xxxx and method_xxxx. Currently, my main issue is that I can't test the changes since in order to edit the code, I had to convert it to .java, and now whenever I try to convert it back to .CLASS, it gives me this error message:

  Reveal hidden contents

r2.java:11: error: class, interface, or enum expected
package com.github.originsplus.power;
^
r2.java:13: error: class, interface, or enum expected
import com.github.originsplus.entity.IGrappleHook;
^
r2.java:14: error: class, interface, or enum expected
import io.github.apace100.origins.power.ActiveCooldownPower;
^
r2.java:15: error: class, interface, or enum expected
import io.github.apace100.origins.power.PowerType;
^
r2.java:16: error: class, interface, or enum expected
import io.github.apace100.origins.util.HudRender;
^
r2.java:17: error: class, interface, or enum expected
import net.minecraft.entity.Entity;
^
r2.java:18: error: class, interface, or enum expected
import net.minecraft.entity.projectile.FishingBobberEntity;
^
r2.java:19: error: class, interface, or enum expected
import net.minecraft.entity.player.PlayerEntity;
^
r2.java:20: error: class, interface, or enum expected
import net.minecraft.util.math.vector.Vector3d;
^
r2.java:21: error: class, interface, or enum expected
import net.minecraft.network.Packet;
^
r2.java:22: error: class, interface, or enum expected
import net.minecraft.network.packet.s2c.play.EntityVelocityUpdateS2CPacket;
^
r2.java:23: error: class, interface, or enum expected
import net.minecraft.entity.player.ServerPlayerEntity;
^
r2.java:24: error: class, interface, or enum expected
import net.minecraft.util.SoundEvent;
^
r2.java:25: error: class, interface, or enum expected
import net.minecraft.util.SoundCategory;
^
14 errors

I am using Eclipse IDE to edit the files. Also this is the code I am trying to convert, followed by the edited mod:

  Reveal hidden contents

public class r {

    public static void main(String[] args) {
        //Printing Hello World    
        System.out.println("This is HelloWorld! example");

    }

}
package com.github.originsplus.power;

import com.github.originsplus.entity.IGrappleHook;
import io.github.apace100.origins.power.ActiveCooldownPower;
import io.github.apace100.origins.power.PowerType;
import io.github.apace100.origins.util.HudRender;
import net.minecraft.entity.Entity;
import net.minecraft.entity.projectile.FishingBobberEntity;
import net.minecraft.entity.player.PlayerEntity;
import net.minecraft.util.math.vector.Vector3d;
import net.minecraft.network.Packet;
import net.minecraft.network.packet.s2c.play.EntityVelocityUpdateS2CPacket;
import net.minecraft.entity.player.ServerPlayerEntity;
import net.minecraft.util.SoundEvent;
import net.minecraft.util.SoundCategory;

public class GrapplePower extends ActiveCooldownPower {
    SoundEvent soundOnThrown;
  
    SoundEvent soundOnRetract;
  
  double strength;
  
  boolean thrown;
  
  FishingBobberEntity grappleHook;
  
  public GrapplePower(PowerType<?> type, PlayerEntity player, int cooldownDuration, HudRender hudRender, SoundEvent soundOnThrownEvent, SoundEvent soundOnRetractEvent, double strength) {
    super(type, player, cooldownDuration, hudRender, null);
    this.soundOnThrown = soundOnThrownEvent;
    this.soundOnRetract = soundOnRetractEvent;
    this.strength = strength;
    this.thrown = false;
  }
  
  public void onUse() {
    if (!this.player.field_70170_p.field_72995_K)
      if (this.thrown && !this.grappleHook.field_5988) {
        retractGrapple();
      } else if (canUse()) {
        throwGrapple();
        use();
      }  
  }
  
  private void throwGrapple() {
    if (this.soundOnThrown != null)
      this.player.field_70170_p.func_184148_a((PlayerEntity)null, this.player.func_226277_ct_(), this.player.func_226278_cu_(), this.player.func_226281_cx_(), this.soundOnThrown, SoundCategory.NEUTRAL, 0.5F, 0.4F / (this.player
          .func_70681_au().nextFloat() * 0.4F + 0.8F)); 
    FishingBobberEntity playerHook = this.player.field_7513;
    this.grappleHook = new FishingBobberEntity(this.player, this.player.field_70170_p, 0, 0);
    ((IGrappleHook)this.grappleHook).setGrapple(true);
    this.player.field_7513 = playerHook;
    this.player.field_70170_p.func_217376_c((Entity)this.grappleHook);
    this.thrown = true;
  }
  
  private void retractGrapple() {
    if (this.soundOnRetract != null)
      this.player.field_70170_p.func_184148_a((PowerType)null, this.player.func_226277_ct_(), this.player.func_226278_cu_(), this.player.func_226281_cx_(), this.soundOnRetract, SoundCategory.NEUTRAL, 0.5F, 0.4F / (this.player
          .func_70681_au().nextFloat() * 0.4F + 0.8F)); 
    Vector3d bobberPos = this.grappleHook.func_213303_ch();
    Vector3d distance = new Vector3d(bobberPos.field_72450_a - (this.player.func_213303_ch()).field_72450_a, bobberPos.field_72448_b - (this.player.func_213303_ch()).field_1351, bobberPos.field_72449_c - (this.player.func_213303_ch()).field_72449_c);
    distance = distance.func_72432_b();
    Vector3d velocity = new Vector3d(distance.field_72450_a * this.strength, distance.field_72448_b * this.strength, distance.field_72449_c * this.strength);
    Vector3d playerVelocity = this.player.func_213322_ci().func_178787_e(velocity);
    this.player.func_213317_d(playerVelocity);
    if (this.player instanceof ServerPlayerEntity) {
        ServerPlayerEntity serverPlayer = (ServerPlayerEntity)this.player;
      serverPlayer.field_13987.func_234923_W_((Packet)new EntityVelocityUpdateS2CPacket(this.player.method_5628(), playerVelocity));
    } 
    this.grappleHook.method_5768();
    this.thrown = false;
  }
}

mod:
https://www.dropbox.com/s/5447brs1zquzebw/Expanded Origins Forge.jar?dl=0

While I don't know how to port the mod, what you can do is extract the .jar file into a folder. Origins mods are compiled just like a datapack. All you have to do is drag and drop the folder into a world's datapack folder.