[1.7.10] Using ASM to replace 1 method

[TLHPoE]

Hi, I'm pretty sure I need to replace a method in the World class, seeing as I don't know how else to do it.

 

I know ASM is used to make methods public, but it can also modify/replace the method itself? I've looked here for an idea on how to do it, but EventTransformer does not exist in 1.7.10.

 

So do any of you know of a tutorial that can still be used in 1.7.10?

[FLUFFY2]

ASM means Access Modifyer. Only for making methods public. And its for only coremod anyway.

You should use Reflection. It can do what you want and its not too hard.

[SanAndreaP]

ASM means Access Modifyer. Only for making methods public. And its for only coremod anyway.

You should use Reflection. It can do what you want and its not too hard.

 

What you're referring to are ATs (Access Transformers).

ASM can be used to all kinds of bytecode manipulations, even go as far as removing or replacing entire classes with custom code.

 

ASM is only available for coremods and you need to know how to write code in ASM.

ATs on the other hand can be utilized by any other mod, IIRC since recent versions of Forge.

[TLHPoE]

Are there any tutorials that cover creating a coremod and writing in ASM?

[SanAndreaP]

Here's a tutorial which looks helpful:

http://www.minecraftforum.net/forums/mapping-and-modding/mapping-and-modding-tutorials/1571568-tutorial-1-6-2-changing-vanilla-without-editing

 

Here's my coremod (updated to 1.7.10) if you want to have a reference:

https://github.com/SanAndreasP/SAPManagerPack

 

By the way, in my loading plugin class I have a @SortingIndex annotation. It makes it so that the coremod is loaded after Forge, thus you can use SRG names (like func_xxxxx_x or field_xxxxx_x) instead of worrying about the notched (like abc.a) names.

[TLHPoE]

Thanks, both links are very helpful.

[FLUFFY2]

What you're referring to are ATs (Access Transformers).

 

Sorry i just switched it by accident. Thanks for telling that!

[TLHPoE]

I'm replacing the computeLightValue method in the World class.

 

What I'm trying to accomplish is adding a new check for how many solid blocks and air blocks stand inbetween the the block it's computing the light value for and the block at the top that can see the sky. Then I'll use that information to somehow alter the light value so that something floating high above the air won't cast the largest shadow on earth.