larsgerrits

It doesn't matter where the folder is. Just be careful when you put it in another game folder.

No. You can put your game folder everywhere you'd like, but putting it in another game folder (.minecraft is a game folder) could cause weird issues. I have a folder containing all game folders at the same level as the .minecraft folder, which contains folders like "1.8.9 modded" or "1.11.2 vanilla".

1.7.10 is no longer supported on this forum.

No. You give the game folder a logical name, e.g.: "1.11.2 modded", which will contain a mods folder for your mods.

Not easily, as you can't edit the Minecraft source code.

You could make different profiles with a different game folder, which has its own mods folder. If you use a different game folder for each profile, you won't get conflicts about mods for different versions.

You are trying to install 2 versions of Optifine, one for 1.7.10. Also, next time: don't post screenshots of the error log. Just copy the text either put it in a spoiler or host it on Pastebin or a Github gist and leave the link here.

Which .gradle folder is the gradle.properties under? It should be under the .gradle folder in your user directory.

minecraft { version = "1.7.10-10.13.4.1614-1.7.10" runDir = "run" } 1.7.10 is no longer supported on this forum.

In the ItemTooltipEvent, you can get the List<String> as well, which are the lines of the tooltip. You can just add a String to the List<String> for a new line of the tooltip.

Do you by any chance have a Git repository with your Scala code? Or a branch on your Java-version repository? It would make debugging a lot easier.

Use the ItemTooltipEvent.

Your RWBYMod.instance is null at the point you call NetworkRegistry#registerGuiHandler. Do you have the variable annotated with @Instance?

1.7.10 is no longer supported on this forum. You should really update to 1.10.2 or 1.11.2.

Post the complete log (logs/fml-client-latest.log).

Either check the inventory every tick (not recommended) or make a custom Slot implementation which calls a method when an ItemStack gets placed inside the Slot.

Caused by: java.lang.ClassNotFoundException: mchorse.metamorph.api.models.IMorphProvider at net.minecraft.launchwrapper.LaunchClassLoader.findClass(LaunchClassLoader.java:191) It is actually not being able to find an interface your EntityActor implements, which you can see way down the stacktrace as it can't find the IMorphProvider interface. Are you sure the mod that interface belongs to is loaded when you run your mod?

Which he already does in his BlockDogBowl, though not with @Override, which he really should do.

In the mappings for 1.11.2, some fields were renamed, including worldObj fields to world. You should really update your mappings if you're using 1.11.2 and they're still called worldObj.

You can put the API code inside src/api/java, this will make sure the API doesn't get compiled and put into your own mod file. To install the mod on the dev workspace, simply put it in the mods folder and that should work. If it still crashes, post the log (logs/fml-client-latest.log).

Tinkers' Construct uses single, non-stackable Items and they store their own the "stack size" in NBT and do logic based on that, instead of ItemStack's stack size.

Try overriding Block#getBlockLayer to return BlockRenderLayer.CUTOUT or BlockRenderLayer.CUTOUT_MIPPED.

It depends on where you initialize your creative tab. The RegisterEvents are called before preInit, so if you initialize your creative tab in preInit, you will set the Item's creative tab to null at the point when you register your Items. You should initialize it at the same time you declare the creative tab variable.

Can you post the complete logs/fml-client-latest.log file?

Just a little? Haha. diesieben knows A LOT more about this than he does! However, that might now always work. And in this case, it doesn't. And you came to the forums for help, diesieben gave you help and information and now you're complaining? Please, just leave the forums then.