OGC3DTilesTileset.h

#pragma once
 
#include "OGC3DTiles.h"
 
#include <Resources/DataFetcherManager.h>
 
#include <Foundation/Geometry/Glm.hpp>
 
#include <vector>
#include <string>
#include <functional>
 
namespace Cogs::Core {
  class Context;
 
  namespace OGC3DTilesTileset {
    //
    // See https://github.com/CesiumGS/3d-tiles/blob/main/specification/schema/README.md for
    // documentation on the JSON schemas
    //
 
    enum class RefineType {
      DEFAULT = 0,
      REPLACE = DEFAULT,
      ADD = 1
    };
 
    struct Content {
      std::string URI;
      OGC3DTiles::BoundingVolume boundingVolume;
      uint32_t group = 0;
    };
 
    struct ImplicitTiling {
      bool isOctTree = false;             // False => Quadtree
      uint8_t availableLevels = 0;       // Global depth of tree
      uint8_t subtreeLevels = 0;         // How many levels in in each subtree
      std::string subTreeURLScheme;  // Naming scheme for subtree files
    };
 
    struct Tile {
      OGC3DTiles::BoundingVolume boundingVolume;
      glm::dmat4 transform;
      float geometricError = 0.0;
      std::vector<Content> contents;
      std::vector<Tile> children;
      bool useImplicitTiling = false;
      ImplicitTiling implicitTiling;
      RefineType refine = RefineType::DEFAULT;
    };
 
    struct Tileset {
      // NOTE: This struct is somewhat a flattened and shortened version of the "tileset.json" structure for easier use in C++ land.
      // This means that certain optional features in the 3DTiles spec are now required.
      std::string version;
      float geometricError = 0.0;
      Tile root;
      std::string baseURL = "";
    };
 
    using FetchCallback = std::function<void(Tileset* mainTileset)>;
    Cogs::Core::DataFetcherManager::FetchId fetch(Context* context, const std::string& baseURL, FetchCallback callback);
  }
}