Function getAndMaybeConvertSpzExtension

CesiumGltfReader/src/decodeSpz.cpp:386–428

}

CesiumGltf::ExtensionKhrGaussianSplattingCompressionSpz2*
getAndMaybeConvertSpzExtension(
    CesiumGltfReader::GltfReaderResult& readGltf,
    CesiumGltf::MeshPrimitive& primitive,
    CesiumGltf::ExtensionKhrGaussianSplatting& splatting) {

  // Check for the real thing.
  CesiumGltf::ExtensionKhrGaussianSplattingCompressionSpz2* pSpz =
      splatting.getExtension<
          CesiumGltf::ExtensionKhrGaussianSplattingCompressionSpz2>();
  if (pSpz) {
    return pSpz;
  }

  // Check for the old versions.
  const CesiumUtility::JsonValue* pKhrSpz =
      primitive.getGenericExtension(ALTERNATE_EXT_NAME1);
  if (pKhrSpz != nullptr) {
    CesiumGltf::ExtensionKhrGaussianSplattingCompressionSpz2* pResult =
        addExtensionFromJsonValue(
            ALTERNATE_EXT_NAME1,
            readGltf,
            splatting,
            *pKhrSpz);
    primitive.extensions.erase(ALTERNATE_EXT_NAME1);
    return pResult;
  }

  const CesiumUtility::JsonValue* pSpzNoVersion =
      splatting.getGenericExtension(ALTERNATE_EXT_NAME2);
  if (pSpzNoVersion != nullptr) {
    CesiumGltf::ExtensionKhrGaussianSplattingCompressionSpz2* pResult =
        addExtensionFromJsonValue(
            ALTERNATE_EXT_NAME2,
            readGltf,
            splatting,
            *pSpzNoVersion);
    primitive.extensions.erase(ALTERNATE_EXT_NAME2);
    return pResult;
  }

  return nullptr;
}
} // namespace

void decodeSpz(CesiumGltfReader::GltfReaderResult& readGltf) {