v1.4.4

source/game/terrain/StarKarstCave.hpp

@@ -0,0 +1,64 @@
+#ifndef STAR_KARST_CAVE_HPP
+#define STAR_KARST_CAVE_HPP
+
+#include "StarTerrainDatabase.hpp"
+#include "StarLruCache.hpp"
+#include "StarVector.hpp"
+#include "StarPerlin.hpp"
+
+namespace Star {
+
+class KarstCaveSelector : public TerrainSelector {
+public:
+  static char const* const Name;
+
+  KarstCaveSelector(Json const& config, TerrainSelectorParameters const& parameters);
+
+  float get(int x, int y) const override;
+
+private:
+  struct LayerPerlins {
+    PerlinF caveDecision;
+    PerlinF layerHeightVariation;
+    PerlinF caveHeightVariation;
+    PerlinF caveFloorVariation;
+  };
+
+  struct Sector {
+    Sector(KarstCaveSelector const* parent, Vec2I sector);
+
+    float get(int x, int y);
+
+    bool inside(int x, int y);
+    void set(int x, int y, float value);
+
+    KarstCaveSelector const* parent;
+    Vec2I sector;
+    List<float> values;
+
+    float m_maxValue;
+  };
+
+  LayerPerlins const& layerPerlins(int y) const;
+
+  int m_sectorSize;
+  int m_layerResolution;
+  float m_layerDensity;
+  int m_bufferHeight;
+  float m_caveTaperPoint;
+
+  Json m_caveDecisionPerlinConfig;
+  Json m_layerHeightVariationPerlinConfig;
+  Json m_caveHeightVariationPerlinConfig;
+  Json m_caveFloorVariationPerlinConfig;
+
+  int m_worldWidth;
+  uint64_t m_seed;
+
+  mutable HashLruCache<int, LayerPerlins> m_layerPerlinsCache;
+  mutable HashLruCache<Vec2I, Sector> m_sectorCache;
+};
+
+}
+
+#endif