std::unique_ptr KHR::TextureInfos::DeserializeTextureTransform()

in GLTFSDK/Source/ExtensionsKHR.cpp [479:535]
44 lines of code
8 McCabe index (conditional complexity)

std::unique_ptr<Extension> KHR::TextureInfos::DeserializeTextureTransform(const std::string& json, const ExtensionDeserializer& extensionDeserializer)
{
    TextureTransform textureTransform;

    auto doc = RapidJsonUtils::CreateDocumentFromString(json);
    const rapidjson::Value sit = doc.GetObject();

    // Offset
    auto offsetIt = sit.FindMember("offset");
    if (offsetIt != sit.MemberEnd())
    {
        if (offsetIt->value.Size() != 2)
        {
            throw GLTFException("Offset member of " + std::string(TEXTURETRANSFORM_NAME) + " must have two values.");
        }

        std::vector<float> offset;
        for (rapidjson::Value::ConstValueIterator ait = offsetIt->value.Begin(); ait != offsetIt->value.End(); ++ait)
        {
            offset.push_back(static_cast<float>(ait->GetDouble()));
        }
        textureTransform.offset.x = offset[0];
        textureTransform.offset.y = offset[1];
    }

    // Rotation
    textureTransform.rotation = GetMemberValueOrDefault<float>(sit, "rotation", 0.0f);

    // Scale
    auto scaleIt = sit.FindMember("scale");
    if (scaleIt != sit.MemberEnd())
    {
        if (scaleIt->value.Size() != 2)
        {
            throw GLTFException("Scale member of " + std::string(TEXTURETRANSFORM_NAME) + " must have two values.");
        }

        std::vector<float> scale;
        for (rapidjson::Value::ConstValueIterator ait = scaleIt->value.Begin(); ait != scaleIt->value.End(); ++ait)
        {
            scale.push_back(static_cast<float>(ait->GetDouble()));
        }
        textureTransform.scale.x = scale[0];
        textureTransform.scale.y = scale[1];
    }

    // TexCoord
    auto texCoordIt = sit.FindMember("texCoord");
    if (texCoordIt != sit.MemberEnd())
    {
        textureTransform.texCoord = static_cast<size_t>(texCoordIt->value.GetUint());
    }

    ParseProperty(sit, textureTransform, extensionDeserializer);

    return std::make_unique<TextureTransform>(textureTransform);
}