So I created a custom context for my mod and it extends Context. This has fields for NoiseGenOctaves, and methods to get them, and a constructor. Just like a regular Context would.

Then in the custom dimensions ChunkGenerator this code is ran

 

ContextZylroth ctx = new ContextZylroth(noiseGen1, noiseGen2, noiseGen3, noiseGen4, noiseGen5, noiseGen6, mobSpawnerNoise);

ctx = TerrainGen.getModdedNoiseGenerators(world, this.rand, ctx);

 

Which causes a ClassCastException for net.minecraftforge.event.terraingen.InitNoiseGensEvent$Context cannot be cast to com.zalthrion.zylroth.world.dimension.ContextZylroth

I'm not quite sure why this happens, to me this code looks right. If someone knows a proper way of creating custom Contexts (If possible) that would be helpful, thanks.

It should be possible, as long as your Context extends Forge's Context you should be fine. As this is the power of generics.

We have examples in vanilla code.