Adding mods to an FTB modpack setup? Possible? Easy? Problematic?

[Ieldra]

The problem is this: I'm currently playing with the DW20 modpack, but it doesn't have RotaryCraft. I don't want to switch to Monster because it doesn't have Ars Magica 2 and I'd prefer to keep my world. Can I take RotaryCraft from an FTB Monster download and add it to the DW20 setup? I've read that FTB modpacks have a unified configuration, so that should not result in block ID conflicts or suchlike. Also, RotaryCraft doesn't add worldgen so my old should work. Right?

 

[Wagon153]

As long as you remember to put in DragonAPI as well, you'll be good. You MIGHT have a potion ID conflict.

 

[Ieldra]

Yeah, I figured I had to add DragonAPI. I am in the habit of reading documentation after all. What's this about a potion ID conflict?

 

[Padfoote]

The newer versions of RotaryCraft (v20+ I think) and Random Things have a potion assigned to the same ID initially. In this case, it will be another mod more than likely, since Random Things isn't in that pack. Just change it like any other ID conflict.

 

[Ieldra]

I know how to change IDs, but how do I know which ids are free?

 

[weckar]

If there's an error report, and you can't figure it out, we can probably help out. Otherwise, there are no inherent problems to adding most mods to existing packs/worlds as long as there are no overlapping recipes.

 

[darkeshrine]

Yeah, I figured I had to add DragonAPI. I am in the habit of reading documentation after all. What's this about a potion ID conflict?

I know how to change IDs, but how do I know which ids are free?

To my understanding, i've programmed websites not java, each potion effect like items and blocks have IDs(or could it just be the potion items that this is tied to?). Rotarycraft under FTB's Master Configs uses ID's 35&36, which ars magica also uses. When i had to fix it, i used 81&82.

 

[epidemia78]

ICBM has three potion IDs, 25-27. If you arent using that mod, those slots are definitely free.

 

[Ieldra]

That is odd. I didn't find any entries for potion effects, neither in the AM2 config nor in the one for RotaryCraft (ICBM has a few but I don't have that installed). I do, however, get a message about a block id conflict. The file says "DecoTank" from RotaryCraft and "block.machine.beta" from Railcraft use the id 452. Now which one should I change? And to what? I already have a few Railcraft machines in my world - namely, a steam boiler, a rock crusher, a steam oven, a few coke ovens and a blast furnace. I'm also using a lot of Railcraft quarried/abyssal stone as building material. The IDconflicts file says "Suggested Ranges: 2830-3119 (290 IDs), 3739-3897 (159 IDs), 2669-2814 (146 IDs)"

Edit:
OK, I think I need to change the DecoTank. I don't understand all the entries in the config, but the Railcraft subblock section appears to indicate that "block.machine.beta" is somehow used in tanks and steam boilers....am I figuring this correctly?

Edit2:
Oddly enough, I am finding that the config entries in the section of the RotaryCraft file where the deco tank is located all have ids in the 3730s, except for this tank. A am also finding that the 3739+ range is not, as suggested, free. Now I'm confused.

 

[Padfoote]

I noticed that the IDs for v23 of ElectriCraft (and probably RotaryCraft) are shifted down 256 in the config. So just add 256 to whatever number you put in to get the actual ID.

 

[epidemia78]

You should only change ids for new mods or it could screw up your world.