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feat(world-gen): rescale biome relief and snow line for 512-tall world

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MDietermann
2026-06-03 07:49:34 +02:00
parent 3c7e7a46a3
commit 715444d10a
6 changed files with 15 additions and 15 deletions
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4
VoxelEngine.Tests/WorldGen/BiomeTests.cs
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@@ -20,8 +20,8 @@ public class BiomeTests
{
var blocks = new BlockRegistry();
var biomes = new BiomeRegistry(42, blocks);
Assert.Equal("Stone", biomes.Mountains.TopBlock(70).Name);
Assert.Equal("Snow Block", biomes.Mountains.TopBlock(120).Name);
Assert.Equal("Stone", biomes.Mountains.TopBlock(200).Name); // below snow line
Assert.Equal("Snow Block", biomes.Mountains.TopBlock(420).Name); // above snow line (384)
}
[Fact]

8
VoxelEngine.Tests/WorldGen/TerrainSamplerTests.cs
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@@ -43,11 +43,11 @@ public class TerrainSamplerTests
for (int x = -200; x < 200; x += 3)
for (int z = -200; z < 200; z += 3)
{
// The dense blur removes inter-biome cliffs (those would be 25+ blocks).
// Remaining deltas are rugged intra-Mountains ridged slopes (~9), which
// are intended terrain, not cliffs; 16 separates the two.
// The dense blur removes inter-biome cliffs. Remaining deltas are
// rugged intra-Mountains ridged slopes, now ~4x larger after the
// 128->512 rescale; 64 separates intended slopes from true cliffs.
int dx = System.Math.Abs(sampler.HeightAt(x, z) - sampler.HeightAt(x + 1, z));
Assert.True(dx <= 16, $"height jump {dx} at ({x},{z})");
Assert.True(dx <= 64, $"height jump {dx} at ({x},{z})");
}
}
}

4
World/WorldGen/Biomes/DesertBiome.cs
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@@ -18,8 +18,8 @@ public sealed class DesertBiome : IBiome
}
public float SampleHeight(NoiseSource noise, float worldX, float worldZ)
=> WorldConstants.SeaLevel + 4f * noise.Continent(worldX, worldZ)
+ 1.5f * this._detail.GetNoise(worldX, worldZ);
=> WorldConstants.SeaLevel + 16f * noise.Continent(worldX, worldZ)
+ 6f * this._detail.GetNoise(worldX, worldZ);
public IBlock TopBlock(int worldY) => this.Surface.Top;
}

4
World/WorldGen/Biomes/ForestBiome.cs
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@@ -18,8 +18,8 @@ public sealed class ForestBiome : IBiome
}
public float SampleHeight(NoiseSource noise, float worldX, float worldZ)
=> WorldConstants.SeaLevel + 6f * noise.Continent(worldX, worldZ)
+ 4f * this._detail.GetNoise(worldX, worldZ);
=> WorldConstants.SeaLevel + 24f * noise.Continent(worldX, worldZ)
+ 16f * this._detail.GetNoise(worldX, worldZ);
public IBlock TopBlock(int worldY) => this.Surface.Top;
}

6
World/WorldGen/Biomes/MountainsBiome.cs
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@@ -4,7 +4,7 @@ namespace VoxelEngine.World.WorldGen.Biomes;
public sealed class MountainsBiome : IBiome
{
private const int SnowLine = 96;
private const int SnowLine = 384;
private readonly FastNoiseLite _ridged;
private readonly IBlock _stone;
private readonly IBlock _snow;
@@ -25,8 +25,8 @@ public sealed class MountainsBiome : IBiome
}
public float SampleHeight(NoiseSource noise, float worldX, float worldZ)
=> WorldConstants.SeaLevel + 10f * noise.Continent(worldX, worldZ)
+ 45f * this._ridged.GetNoise(worldX, worldZ);
=> WorldConstants.SeaLevel + 40f * noise.Continent(worldX, worldZ)
+ 200f * this._ridged.GetNoise(worldX, worldZ);
public IBlock TopBlock(int worldY) => worldY >= MountainsBiome.SnowLine ? this._snow : this._stone;
}

4
World/WorldGen/Biomes/PlainsBiome.cs
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@@ -18,8 +18,8 @@ public sealed class PlainsBiome : IBiome
}
public float SampleHeight(NoiseSource noise, float worldX, float worldZ)
=> WorldConstants.SeaLevel + 6f * noise.Continent(worldX, worldZ)
+ 2f * this._detail.GetNoise(worldX, worldZ);
=> WorldConstants.SeaLevel + 24f * noise.Continent(worldX, worldZ)
+ 8f * this._detail.GetNoise(worldX, worldZ);
public IBlock TopBlock(int worldY) => this.Surface.Top;
}