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43 lines
1.2 KiB
43 lines
1.2 KiB
2 years ago
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using System;
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using gaemstone.ECS;
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using static flecs_hub.flecs;
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namespace gaemstone.Bloxel.WorldGen;
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[Module]
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public class BasicWorldGenerator
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{
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private readonly FastNoiseLite _noise;
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public BasicWorldGenerator()
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{
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_noise = new(new Random().Next());
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_noise.SetNoiseType(FastNoiseLite.NoiseType.OpenSimplex2);
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_noise.SetFractalType(FastNoiseLite.FractalType.Ridged);
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_noise.SetFractalOctaves(4);
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_noise.SetFractalGain(0.6F);
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}
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[Tag]
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public struct HasBasicWorldGeneration { }
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[System]
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public void Populate(Universe universe, Entity entity,
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in Chunk chunk, ChunkPaletteStorage<ecs_entity_t> storage,
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[Not] HasBasicWorldGeneration _)
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{
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var stone = universe.Lookup("Stone");
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for (var lx = 0; lx < Chunk.LENGTH; lx++)
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for (var ly = 0; ly < Chunk.LENGTH; ly++)
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for (var lz = 0; lz < Chunk.LENGTH; lz++) {
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var gx = chunk.Position.X << Chunk.BIT_SHIFT | lx;
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var gy = chunk.Position.Y << Chunk.BIT_SHIFT | ly;
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var gz = chunk.Position.Z << Chunk.BIT_SHIFT | lz;
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var bias = Math.Clamp(gy / 32.0F + 1.0F, 0.0F, 1.0F);
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if (_noise.GetNoise(gx, gy, gz) > bias)
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storage[lx, ly, lz] = stone;
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}
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entity.Add<HasBasicWorldGeneration>();
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}
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}
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