Method LoadBuffers

IO/Geometry/vtkGLTFDocumentLoaderInternals.cxx:64–111

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
bool vtkGLTFDocumentLoaderInternals::LoadBuffers(bool firstBufferIsGLB)
{
  try
  {
    nlohmann::json bufferRoot =
      nlohmann::json::parse(this->Self->GetInternalModel()->BufferMetaData);
    // Load buffers from disk
    unsigned int bufferIndex = 0;
    for (const auto& glTFBuffer : bufferRoot)
    {
      std::vector<char> buffer;
      if (this->LoadBuffer(glTFBuffer, buffer))
      {
        if (buffer.empty() && this->Self->GetInternalModel()->Buffers.empty() && !firstBufferIsGLB)
        {
          vtkErrorWithObjectMacro(this->Self,
            "Invalid first buffer value for glb file. No buffer was loaded from the file.");
          return false;
        }
        if (firstBufferIsGLB && bufferIndex == 0 && !buffer.empty())
        {
          vtkErrorWithObjectMacro(
            this->Self, "Invalid first buffer value for glb file. buffer.uri should be undefined");
          return false;
        }

        // skip if buffer has already been loaded from the GLB BIN chunk
        if (!firstBufferIsGLB || bufferIndex > 0)
        {
          this->Self->GetInternalModel()->Buffers.emplace_back(std::move(buffer));
        }
      }
      else
      {
        vtkErrorWithObjectMacro(this->Self, "Could not load Buffer from JSON.");
        return false;
      }
      bufferIndex++;
    }
  }
  catch (nlohmann::json::parse_error& e)
  {
    vtkErrorWithObjectMacro(this->Self, "Could not parse JSON: " << e.what());
    return false;
  }

  return true;
}

//------------------------------------------------------------------------------
bool vtkGLTFDocumentLoaderInternals::LoadFileMetaData(nlohmann::json& gltfRoot)