96 lines
3.1 KiB
C++
96 lines
3.1 KiB
C++
#pragma once
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#include <cstdint>
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#include "Noise.h"
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#include "NoiseAdv.h"
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#include "World.h"
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namespace vf {
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enum class NetherBiome : uint8_t {
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NetherWastes = 0,
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SoulSandValley = 1,
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BasaltDeltas = 2,
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CrimsonForest = 3,
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Count,
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};
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// Vertical profile of a single Nether column. The cavern is the gap between
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// the top of the lower mass (floorHeight) and the underside of the roof mass
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// (ceilingHeight); everything at or below lavaLevel inside that gap is lava.
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struct NetherColumn {
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NetherBiome biome = NetherBiome::NetherWastes;
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int floorHeight = 0;
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int ceilingHeight = 0;
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int lavaLevel = 0;
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bool drowned = false;
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int cavernHeight() const { return ceilingHeight - floorHeight - 1; }
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};
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// Deterministic Nether generator: a solid rock volume between a bedrock floor
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// and a bedrock roof, hollowed out by a cavern profile plus 3D carving noise,
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// flooded with a lava sea at a fixed level, and surfaced per Nether biome.
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// The same seed and column always yield the same blocks.
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class NetherGenerator {
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public:
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struct Params {
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uint32_t seed = 1337u;
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int floorY = 0;
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int ceilingY = 128;
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int lavaLevel = 31;
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int bedrockThickness = 4;
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int roofThickness = 12;
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float biomeFrequency = 0.0046f;
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float floorFrequency = 0.017f;
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float ceilingFrequency = 0.013f;
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float caveFrequency = 0.031f;
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float caveThreshold = 0.87f;
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float blobThreshold = 0.46f;
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float quartzFrequency = 0.125f;
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float quartzThreshold = 0.60f;
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bool decorate = true;
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};
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NetherGenerator();
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explicit NetherGenerator(const Params& netherParams);
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const Params& settings() const { return params; }
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int stackChunkCount() const { return (params.ceilingY - params.floorY) / chunkSize; }
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NetherBiome biomeAt(int gx, int gz) const;
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NetherColumn columnAt(int gx, int gz) const;
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// Tunnel network cut through the solid mass, sampled independently of the
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// column profile so it links the floor rock to the roof rock.
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bool isCarved(int gx, int gy, int gz) const;
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bool isBedrock(int gx, int gy, int gz) const;
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Block blockAt(const NetherColumn& column, int gx, int gy, int gz) const;
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void generateChunk(Chunk& chunk, const Vec3i& chunkCoord) const;
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void generateColumn(World& world, int columnX, int columnZ) const;
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void decorateColumn(World& world, int columnX, int columnZ) const;
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private:
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bool isBlob(int gx, int gy, int gz) const;
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Block topFor(NetherBiome biome) const;
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Block fillerFor(NetherBiome biome) const;
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void raiseBasaltPillar(World& world, int gx, int gz, const NetherColumn& column, uint32_t roll) const;
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void pourLavafall(World& world, int gx, int gz, const NetherColumn& column) const;
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void hangGlowstone(World& world, int gx, int gz, const NetherColumn& column, uint32_t roll) const;
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void plantFungus(World& world, int gx, int gz, const NetherColumn& column, uint32_t roll) const;
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Params params;
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PerlinNoise floorNoise;
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PerlinNoise ceilingNoise;
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PerlinNoise caveNoise;
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PerlinNoise blobNoise;
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PerlinNoise oreNoise;
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NoiseAdv biomeNoise;
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};
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} // namespace vf
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