How to make flame bow start fire?

[Citybuild122]

Okay, so I saw a forum where some people made a flame enchanted bow spread fire. It was using command blocks and redstone. The only problem was I couldn't get it to work. Their video was extremely unprofessional and I couldn't quite get it copied. With that said, does anyone know of a way to accomplish this?

 

[LordPINE]

Would you mind specifying the mc version? The command system has had quite a few changes, so the exact command will differ.

 

[Celestialphoenix]

My advice would be to ask on the official Minecraft forums, or on a redstone/command block reddit subforum. The FTB forum is mostly full of modded MC players- we're happy to help out, but collective expert knowledge of in-depth vanilla mechanics might be somewhat lacking in comparison.
If you can find the video again it'll be a good help too.

That aside- the commands would likely work by;

checking if its a valid fire arrow
tracking the arrow entities and detecting where they hit
if true, then ignite block XYZ.​

The Minecraft wikis would also be a good bet on learning how to use command blocks.

 

[Citybuild122]

Would you mind specifying the mc version? The command system has had quite a few changes, so the exact command will differ.

I'm running my revelation server on 1.12.2.

My advice would be to ask on the official Minecraft forums, or on a redstone/command block reddit subforum. The FTB forum is mostly full of modded MC players- we're happy to help out, but collective expert knowledge of in-depth vanilla mechanics might be somewhat lacking in comparison.
If you can find the video again it'll be a good help too.

That aside- the commands would likely work by;

checking if its a valid fire arrow
tracking the arrow entities and detecting where they hit
if true, then ignite block XYZ.​

The Minecraft wikis would also be a good bet on learning how to use command blocks.

Well, the problem is that I don't know if FTB has changed anything, hence why I am asking here. Here is the video:

 

[LordPINE]

The issue is that these commands are for 1.8, and the command system has changed since then.