Minecraft Forums

Quote from konwboj

Hey guys! Can anyone help me?
I'm trying to change that:

if (!this.worldObj.isRemote && this.openContainer != null && !this.openContainer.canInteractWith(this))
{
this.closeScreen();
this.openContainer = this.inventoryContainer;
}

to this:

if (!this.worldObj.isRemote && this.openContainer != null && !this.openContainer.canInteractWith(this))
{
}

This is my code:

package portables.asm;
import java.util.Iterator;
import net.minecraft.launchwrapper.IClassTransformer;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassWriter;
import org.objectweb.asm.tree.AbstractInsnNode;
import org.objectweb.asm.tree.ClassNode;
import org.objectweb.asm.tree.LineNumberNode;
import org.objectweb.asm.tree.MethodNode;
public class ClassTransformer implements IClassTransformer
{
@Override
public byte[] transform(String arg0, String arg1, byte[] arg2)
{
if (arg0.equals("ue"))
{
return patchClassEnitityPlayer(arg0, arg2, true);
}
if (arg0.equals("net.minecraft.entity.player.EntityPlayer"))
{
return patchClassEnitityPlayer(arg0, arg2, false);
}
return arg2;
}
@SuppressWarnings("unused")
public byte[] patchClassEnitityPlayer(String name, byte[] bytes, boolean obfuscated)
{
String targetMethodName = "";
if (obfuscated == true)
targetMethodName = "l_";
else
targetMethodName = "onUpdate";
ClassNode classNode = new ClassNode();
ClassReader classReader = new ClassReader(bytes);
classReader.accept(classNode, 0);
Iterator<MethodNode> methods = classNode.methods.iterator();
while (methods.hasNext())
{
MethodNode m = methods.next();
int fdiv_index = -1;
if ((m.name.equals(targetMethodName) && m.desc.equals("()V")))
{
AbstractInsnNode currentNode = null;
AbstractInsnNode targetNode = null;
Iterator<AbstractInsnNode> iter = m.instructions.iterator();
int index = -1;
while (iter.hasNext())
{
     index++;
     currentNode = iter.next();
     if (currentNode instanceof LineNumberNode)
     {
     LineNumberNode line = (LineNumberNode)currentNode;
     if (line.line == 346)
     {
     targetNode = currentNode;
     fdiv_index = index;
     }
     }
}

AbstractInsnNode remNode = m.instructions.get(fdiv_index + 1);
AbstractInsnNode remNode1 = m.instructions.get(fdiv_index + 2);
AbstractInsnNode remNode2 = m.instructions.get(fdiv_index + 6);
AbstractInsnNode remNode3 = m.instructions.get(fdiv_index + 7);
AbstractInsnNode remNode4 = m.instructions.get(fdiv_index + 8);
AbstractInsnNode remNode5 = m.instructions.get(fdiv_index + 9);
m.instructions.remove(remNode);
m.instructions.remove(remNode1);
m.instructions.remove(remNode2);
m.instructions.remove(remNode4);
m.instructions.remove(remNode3);
m.instructions.remove(remNode5);
System.out.println("Patching Complete!");
break;
}
}
ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);
classNode.accept(writer);
return writer.toByteArray();
}
}

This is error that i'm getting:

2013-09-08 16:10:28 [INFO] [STDOUT] Patching Complete!
2013-09-08 16:10:28 [SEVERE] [ForgeModLoader] Unable to launch
java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:57)
at net.minecraft.launchwrapper.Launch.main(Launch.java:18)
Caused by: java.lang.NoClassDefFoundError: net/minecraft/entity/player/EntityPlayer
at net.minecraft.client.main.Main.main(Main.java:37)
... 6 more
Caused by: java.lang.ClassNotFoundException: net.minecraft.entity.player.EntityPlayer
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:179)
at java.lang.ClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 7 more
Caused by: java.lang.NullPointerException
at org.objectweb.asm.Frame.merge(Frame.java:1292)
at org.objectweb.asm.MethodWriter.visitMaxs(MethodWriter.java:1303)
at org.objectweb.asm.tree.MethodNode.accept(MethodNode.java:592)
at org.objectweb.asm.tree.MethodNode.accept(MethodNode.java:515)
at org.objectweb.asm.tree.ClassNode.accept(ClassNode.java:340)
at portables.asm.ClassTransformer.patchClassEnitityPlayer(ClassTransformer.java:97)
at portables.asm.ClassTransformer.transform(ClassTransformer.java:26)
at net.minecraft.launchwrapper.LaunchClassLoader.runTransformers(LaunchClassLoader.java:267)
at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:165)
... 9 more

ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS | ClassWriter.COMPUTE_FRAMES);

ClassWriter writer = new ClassWriter(ClassWriter.COMPUTE_MAXS);

Quote from gaga654

Can you describe how to find the name of the obfuscated version of a class or method? I'm not sure I understand.

Quote from gaga654

Yes, thanks!

Quote from lightOfDay

I don't know what I'm missing, but I can't figure out how to run the coremod in a dev enviorment. I would have assumed it would be able to pull the pre-injected mod off the classpath like it can with normal mods, but apparently not. All I have is a dummy transformer, it just returns the input bytes.

Quote from culegooner

Running the coremod in your development enviroment
--------------------------------------------------------

This is how I run coremods in my development enviroment. There is another way using the argument fml.coreMods.load, but I never tried that. I use the approach I'm explaining here since I could also include the class patches to it as in the example of CreeperBurnCore discussed earlier.

If you still want to use the fml.coreMods.load argument, then just type the following in your VM arguments of your run configuration. If you have multiple coremods you seperate them with a comma.

-Dfml.coreMods.load=mod.culegooner.ExplosionDropsCore.EDFMLLoadingPlugin

Here's how to create the dummy jar:

First create a directory called META-INF.
Inside the META-INF folder create a file called MANIFEST.MF

Edit the file and for the line FMLCorePlugin write the fully qualified name of the class that implements the IFMLLoadingPlugin interface.
Make sure to include the other 2 lines as well.

Manifest-Version: 1.0
FMLCorePlugin: mod.culegooner.ExplosionDropsCore.EDFMLLoadingPlugin
Created-By: 1.7.0 (Oracle Corporation)

Compress the directory into a zip using winrar or 7zip and rename the file to have the extension .jar instead of .zip (Don't compress into a .rar format!)

In the end the final jar should look like this:

ExplosionDropsCore_dummy.jar
+->META-INF
..|
..+-> MANIFEST.MF

Now copy the new jar file to the directory /forge/mcp/jars/mods