05-01-2013, 12:56 AM
You cannot "change" in a spot, you either have to provide the entire 16x16 biomes or leave them as generated. That is, you have a chance to set biomes before the generator kicks in, so you can set yours, but you don't have access to those that the generator will generate (OnChunkGenerating); or you have access to the biomes *after* the entire chunk has been generated, you can change a single column's biome then, but it won't make any difference for the generator anymore (OnChunkGenerated).
Come to think of it, this isn't too useful for the plugins, I might rethink the callbacks in the chunk generator to give plugins more control.
There's one more point to this - some parts of the generator query neighboring chunk for data (Biomal height uses 3x3 chunk neighbors worth of biome data, Trees use 3x3 neighbors of Composition data), and those neighbors don't go through the callbacks at all, so even if you had a plugin that would set all biome to one value, the height generator won't work as expected, because it would still see the underlying biome generator in the neighbors.
Come to think of it, this isn't too useful for the plugins, I might rethink the callbacks in the chunk generator to give plugins more control.
There's one more point to this - some parts of the generator query neighboring chunk for data (Biomal height uses 3x3 chunk neighbors worth of biome data, Trees use 3x3 neighbors of Composition data), and those neighbors don't go through the callbacks at all, so even if you had a plugin that would set all biome to one value, the height generator won't work as expected, because it would still see the underlying biome generator in the neighbors.