Function decodeSpz

CesiumGltfReader/src/decodeSpz.cpp:431–473

} // namespace

void decodeSpz(CesiumGltfReader::GltfReaderResult& readGltf) {
  CESIUM_TRACE("CesiumGltfReader::decodeSpz");
  if (!readGltf.model) {
    return;
  }

  CesiumGltf::Model& model = readGltf.model.value();

  for (CesiumGltf::Mesh& mesh : model.meshes) {
    for (CesiumGltf::MeshPrimitive& primitive : mesh.primitives) {
      // KHR_spz_gaussian_splats_compression has no KHR_gaussian_splatting
      // extension attached Just throw one on there to make this easier
      if (primitive.extensions.contains(ALTERNATE_EXT_NAME1)) {
        primitive.addExtension<CesiumGltf::ExtensionKhrGaussianSplatting>();
      }

      CesiumGltf::ExtensionKhrGaussianSplatting* pSplat =
          primitive.getExtension<CesiumGltf::ExtensionKhrGaussianSplatting>();
      if (!pSplat) {
        continue;
      }

      CesiumGltf::ExtensionKhrGaussianSplattingCompressionSpz2* pSpz =
          getAndMaybeConvertSpzExtension(readGltf, primitive, *pSplat);
      if (!pSpz) {
        continue;
      }

      fixAttributeNames(primitive);
      decodePrimitive(readGltf, primitive, *pSpz);

      // Remove the SPZ extension as it no longer applies.
      pSplat->extensions.erase(
          CesiumGltf::ExtensionKhrGaussianSplattingCompressionSpz2::
              ExtensionName);
    }
  }

  model.removeExtensionRequired(
      CesiumGltf::ExtensionKhrGaussianSplattingCompressionSpz2::ExtensionName);
  model.removeExtensionRequired(ALTERNATE_EXT_NAME1);
  model.removeExtensionRequired(ALTERNATE_EXT_NAME2);
}

bool hasSpzExtension(GltfReaderResult& readGltf) {
  CESIUM_ASSERT(readGltf.model);