Method LoadSparse

IO/Geometry/vtkGLTFDocumentLoaderInternals.cxx:1179–1235

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bool vtkGLTFDocumentLoaderInternals::LoadSparse(
  const nlohmann::json& root, vtkGLTFDocumentLoader::Accessor::Sparse& sparse)
{
  if (root.empty() || !root.is_object())
  {
    vtkErrorWithObjectMacro(this->Self, "Invalid accessor.sparse object");
    return false;
  }
  if (!vtkGLTFUtils::GetIntValue(root, "count", sparse.Count))
  {
    vtkErrorWithObjectMacro(this->Self, "Invalid accessor.sparse.count value");
    return false;
  }
  const nlohmann::json& indices = root.value("indices", nlohmann::json::object());
  const nlohmann::json& values = root.value("values", nlohmann::json::object());
  if (indices.empty() || values.empty() || !indices.is_object() || !values.is_object())
  {
    vtkErrorWithObjectMacro(
      this->Self, "Invalid accessor.sparse.indices or accessor.sparse.values value");
    return false;
  }
  if (!vtkGLTFUtils::GetIntValue(indices, "bufferView", sparse.IndicesBufferView))
  {
    vtkErrorWithObjectMacro(this->Self, "Invalid accessor.sparse.indices.bufferView value");
    return false;
  }
  if (!vtkGLTFUtils::GetIntValue(indices, "byteOffset", sparse.IndicesByteOffset))
  {
    vtkErrorWithObjectMacro(this->Self, "Invalid accessor.sparse.indices.byteOffset value");
    return false;
  }
  int intIndicesComponentTypes = 0;
  if (!vtkGLTFUtils::GetIntValue(indices, "componentType", intIndicesComponentTypes))
  {
    vtkErrorWithObjectMacro(this->Self, "Invalid accessor.sparse.indices.componentType value");
    return false;
  }
  if (intIndicesComponentTypes < static_cast<int>(vtkGLTFDocumentLoader::ComponentType::BYTE) ||
    intIndicesComponentTypes > static_cast<int>(vtkGLTFDocumentLoader::ComponentType::FLOAT))
  {
    vtkErrorWithObjectMacro(this->Self, "Invalid accessor.sparse.componentType value");
    return false;
  }
  sparse.IndicesComponentType =
    static_cast<vtkGLTFDocumentLoader::ComponentType>(intIndicesComponentTypes);
  if (!vtkGLTFUtils::GetIntValue(values, "bufferView", sparse.ValuesBufferView))
  {
    vtkErrorWithObjectMacro(this->Self, "Invalid accessor.sparse.values.bufferView value");
    return false;
  }
  if (!vtkGLTFUtils::GetIntValue(values, "byteOffset", sparse.ValuesByteOffset))
  {
    vtkErrorWithObjectMacro(this->Self, "Invalid accessor.sparse.values.byteOffset value");
    return false;
  }
  return true;
}