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Biomes/decorations/ores: Make relative to 'water_level' setting

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Add 'biome_zero_level' argument to 'generateBiomes()', 'deco_zero_level'
argument to 'placeAllDecos()' and 'ore_zero_level' to 'placeAllOres()'
to allow mapgens to vertically shift the registered biomes, decorations
and ores per-mapchunk.
Will also allow many realm possibilities in future mapgens.
This commit is contained in:
paramat 2017-06-14 02:00:51 +01:00 • committed by paramat
parent ef285b2815
commit 8299e4b67e
14 changed files with 90 additions and 43 deletions
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7
src/mapgen.cpp
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@ -621,7 +621,7 @@ MapgenBasic::~MapgenBasic()
}
MgStoneType MapgenBasic::generateBiomes()
MgStoneType MapgenBasic::generateBiomes(s16 biome_zero_level)
{
// can't generate biomes without a biome generator!
assert(biomegen);
@ -673,7 +673,10 @@ MgStoneType MapgenBasic::generateBiomes()
(air_above || !biome);
if (is_stone_surface || is_water_surface) {
biome = biomegen->getBiomeAtIndex(index, y);
// Limit to +-MAX MAP GENERATION LIMIT to work with biome y_min / y_max.
s32 relative_y = rangelim(y - biome_zero_level,
-MAX_MAP_GENERATION_LIMIT, MAX_MAP_GENERATION_LIMIT);
biome = biomegen->getBiomeAtIndex(index, relative_y);
if (biomemap[index] == BIOME_NONE && is_stone_surface)
biomemap[index] = biome->index;