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Add seed validation for server world creation and override-seed property

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The dedicated server previously picked a completely random seed with no
biome diversity checks (the client validates but the server skipped it).
On top of that, the client's findSeed() was hardcoded to only check a
54-chunk (Classic) area, so Large worlds had no diversity guarantee
beyond the center.

New server worlds now use findSeed() scaled to the full target world
size. Added override-seed in server.properties to fix existing worlds
without deleting them.
This commit is contained in:
itsRevela
2026-03-24 13:07:04 -05:00
parent 5dad6c24f7
commit 08f14e32ae
10 changed files with 66 additions and 9 deletions
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9
Minecraft.World/LevelData.cpp
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@@ -13,6 +13,15 @@ LevelData::LevelData()
LevelData::LevelData(CompoundTag *tag)
{
seed = tag->getLong(L"RandomSeed");
// Allow server.properties to override the world seed for biome generation
// on existing worlds (e.g. to fix monotonous biomes after world expansion).
if (app.HasSeedOverride())
{
app.DebugPrintf("Overriding world seed: %lld -> %lld\n", seed, app.GetSeedOverride());
seed = app.GetSeedOverride();
}
m_pGenerator = LevelType::lvl_normal;
if (tag->contains(L"generatorName"))
{