OGC3DTilesSubtree.h

#include "OGC3DTiles.h"
 
#include <Context.h>
 
#include <Resources/DataFetcherManager.h>
 
#include <Foundation/Geometry/BoundingBox.hpp>
#include <Foundation/Geometry/Glm.hpp>
 
#include <vector>
#include <string>
#include <functional>
 
namespace Cogs::Core {
  namespace OGC3DTilesSubtree {
    //
    // See https://github.com/CesiumGS/3d-tiles/blob/main/specification/schema/README.md for
    // documentation on the JSON schemas
    //
 
    struct Availability {
      bool allIsAvailable = false; // True: All items avalilable. False: Some items available (use the bitstream).
      uint32_t bitstreamIdx = 0;   // Which bitstream bufferView/section to use
      uint32_t availableCount = 0; // Number of binary elementes in bitstream
    };
 
    struct BitstreamSection {
      uint8_t bitstreamIdx = 0;
      uint32_t startIdx = 0;
      uint32_t length = 0;
    };
 
    struct Subtree {      
      OGC3DTiles::Coord globalCoord;
 
      uint8_t levelsPerSubtree = 0;
 
      Availability tileAvailability;
      Availability childSubtreeAvailability;
      std::vector<Availability> contentAvailability;
 
      std::vector<BitstreamSection> bitstreamSections;
      std::vector<std::vector<uint8_t>> bitstreams;
      int pendingRequests = 0; // Number of pending external bin-file requests
    };
 
    typedef std::function<void(Subtree* subtree)> FetchSubtreeCallback;
    Cogs::Core::DataFetcherManager::FetchId fetchSubtree(Cogs::Core::Context* context, const std::string& URL, uint32_t uniqueComponentId, FetchSubtreeCallback callback);
 
    std::vector<OGC3DTiles::Coord> getChildren(const Subtree* subtree, const OGC3DTiles::Coord& parent);
    std::vector<OGC3DTiles::Coord> getAllChildren(const Subtree* subtree, const OGC3DTiles::Coord& parent);
 
    std::vector<OGC3DTiles::Coord> getLeafNodesSubtreeCoords(const Subtree* subtree, const OGC3DTiles::Coord& leafNodeCoord);
 
    OGC3DTiles::Coord globalToLocal(const Subtree* subtree, const OGC3DTiles::Coord& globalCoord);
    OGC3DTiles::Coord getSubtreesRootCoord(int levelsPerSubtrees, const OGC3DTiles::Coord& coord);
 
    bool hasContent(const Subtree* subtree, const OGC3DTiles::Coord& coord);
    bool isLeafNodeInSubtree(const Subtree* subtree, const OGC3DTiles::Coord& coord);
  };
};