Biome.h

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#pragma once
#include "common/Export.h"
 
 
#include "procgen/PointSet.h"
#include "procgen/SpatialData.h"
 
#include <cstdint>
#include <memory>
#include <string>
#include <vector>
 
namespace eve::procgen {
 
struct BiomeAssetRule {
    std::string asset;
    float       weight   = 1.f;
    float       minScale = 1.f;
    float       maxScale = 1.f;
    bool        randomYaw = true;
};
 
struct BiomeLayerRule {
    std::string                  name;
    int                          priority = 0;
    float                        density  = 1.f;
    std::shared_ptr<SpatialData> spatial;
    std::vector<BiomeAssetRule>  assets;
};
 
class EVENGINE_API_DOMAINS BiomeRules {
public:
    void clear();
    bool addLayer(const std::string& name, SpatialData* spatial, int priority, float density);
    bool removeLayer(const std::string& name);
    bool hasLayer(const std::string& name) const;
    int  getLayerCount() const;
    std::string getLayerName(int index) const;
    int         getLayerPriority(const std::string& name) const;
    float       getLayerDensity(const std::string& name) const;
 
    bool addAsset(const std::string& layerName, const std::string& asset, float weight,
                  float minScale, float maxScale, bool randomYaw);
    int         getAssetCount(const std::string& layerName) const;
    std::string getAssetName(const std::string& layerName, int index) const;
 
    bool addExclusion(SpatialData* spatial);
    int  getExclusionCount() const;
 
    PointSet* generate(SpatialData* domain, float spacing, uint32_t seed, float jitter);
    std::string getError() const;
    std::string debugReport() const;
 
private:
    BiomeLayerRule*       findLayer(const std::string& name);
    const BiomeLayerRule* findLayer(const std::string& name) const;
 
    std::vector<BiomeLayerRule>            layers_;
    std::vector<std::shared_ptr<SpatialData>> exclusions_;
    std::string                            error_;
    int                                    lastCandidateCount_ = 0;
    int                                    lastOutputCount_    = 0;
};
 
}  // namespace eve::procgen