[1.7.10] Replacing vanilla classes

[RedEnergy]

Hi folks, i need to disable projectiles to destroy item frame, i tried to do it with event but it's not possible. Now i want to do it using IClassTransformer. But it's not working, nothing happens. Code below.

Core file: http://pastebin.com/3nxf5nQB ,

Loading plugin: http://pastebin.com/w3fTYwmE,

ClassTransformer: http://pastebin.com/nm51AcC4.

[Abastro]

Nothing Happens from where? On development environment, or as exported mod?

[RedEnergy]

Nothing happens everywhere, may be i must register loading plugins somewhere?

[Abastro]

Maybe you need the Core class to a coremod.

Do you have META-INF?

[RedEnergy]

Didn't heard about META-INF for coremods. How to fill it?

[RedEnergy]

Found information about it on wiki, now my MANIFEST.MF looks like this: http://pastebin.com/wgYwV8Z7 . But still it doesn't works

[RedEnergy]

Ok, but i dont realise how can i replace only 1 method in class.

[Draco18s]

To put it simply:

 

Find the method involved, insert an INVOKE call to a class you control, and handle it there.

For example, here is where I'm inserting a call inside EntityAnimal#func_146082_f and handling it here, so I can interrupt animals going into love mode only when the player feeds them (I have an AI task that causes it to happen at random intervals as well and I don't want to cancel those).  The inserted call only fires off an event, which is handled elsewhere.

 

ASM is a right pain and will likely drive you insane, but sometimes its the only way to do what you need.

Oh, and this class may be helpful.  shieldbug1 originally wrote it.  I've modified it a bit to help figure out what stuff is and does; line 255 should be commented prior to releasing due to unintelligent detection of programmer errors (that is: if looking for an overloaded function, it will spit out output even if a valid method is located, but it did help me find typos).

 

Note: repository is out of date and is not 100% functional, but should provide at least a baseline for good ASM.