e034d10339
Terrain feel: biome regions ~10x larger (Voronoi cell size 96->960); terrain height now eases across biome borders via a Voronoi distance blend (smooth, and ~25x cheaper than the old 169-sample box blur); mountains capped to ~2/3 world height and gentled (ridged amplitude/frequency lowered), snow line lowered to match. Centralization: ~27 world-gen/render tuning constants (biome amplitudes & frequencies, climate-noise frequencies/octaves, biome-selection thresholds, blend width, cell size, filler depth, snow line, camera near plane, spawn offset, overlay scale) hoisted from scattered literals into a region-organized, fully-commented Configuration. Configuration is threaded into NoiseSource, the biomes, BiomeRegistry, BiomeMap (+Classify), TerrainSampler, WorldGenerator (+BlockAt filler depth), and Camera via Player. Defaults equal the prior values, so generation is unchanged; worldgen tests updated for the new constructor signatures.
41 lines
1.3 KiB
C#
41 lines
1.3 KiB
C#
using VoxelEngine.Core;
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namespace VoxelEngine.World.WorldGen;
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public sealed class TerrainSampler
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{
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private readonly NoiseSource _noise;
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private readonly BiomeMap _biomes;
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private readonly Configuration _cfg;
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public TerrainSampler(NoiseSource noise, BiomeMap biomes, Configuration cfg)
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{
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this._noise = noise;
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this._biomes = biomes;
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this._cfg = cfg;
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}
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public int HeightAt(float worldX, float worldZ)
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{
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// Blend the two nearest biomes' heights (each evaluated AT this column) by
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// how deep inside the nearer cell we are: exactly on the border they mix
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// 50/50, easing to 100% of the nearer biome over BiomeBlendWidth blocks.
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BiomeMap.BiomeBlend blend = this._biomes.NearestTwo(worldX, worldZ);
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float hNear = blend.Near.SampleHeight(this._noise, worldX, worldZ);
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float hFar = blend.Far.SampleHeight(this._noise, worldX, worldZ);
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float fracFar = 0.5f * (1f - SmoothStep01(blend.BorderDistance / this._cfg.BiomeBlendWidth));
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float avg = hNear * (1f - fracFar) + hFar * fracFar;
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int h = (int)MathF.Round(avg);
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return Math.Clamp(h, 0, WorldConstants.WorldHeight - 1);
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}
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// Hermite smoothstep on [0,1].
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private static float SmoothStep01(float t)
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{
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t = Math.Clamp(t, 0f, 1f);
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return t * t * (3f - 2f * t);
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}
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}
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