Is Hardmode corruption spawn location set on world creation

[MrThief]

Something got me curious about this because when you go onto Hardmode a huge V of corruption/crimson biome spawns in your world, is it predetermined or can you reset the wall of flesh fight to get a good/better V spawn location. If the corruption spawns in the jungle biome can a reset to performed, and the wall of flesh re-fought to change the location of the V shape of corruption

 

[r4v1n6]

You can reset.

On most platforms, if you load a save from before entering hardmode you can keep re-fighting WoF and get a different result.
On pc though there is currently a bug that causes hallow/corruption to always spawn the same way.

 

[Kojiro_S]

It isn't predetermined. I've entered hardmode several times on a single world to check and not only the angle was different, but the direction corruption and hallow took switched as well.

 

[Sigma90]

It used to be random, but in one of the 1.3.x versions, it became preset and is tied to the world seed. The angle might vary slightly, but which side the C/C/H uses is unfortunately now fixed.