Function ResolveParameter

Hydrogent/src/HnMaterialNetwork.cpp:417–449

// corresponding value on given SdrNode.
template <typename T>
T ResolveParameter(const pxr::HdMaterialNode2&       Node,
                   const pxr::SdrShaderNodeConstPtr& SdrNode,
                   const pxr::TfToken&               Name,
                   const T&                          DefaultValue)
{
    // First consult node parameters...
    {
        const auto param_it = Node.parameters.find(Name);
        if (param_it != Node.parameters.end())
        {
            const pxr::VtValue& Value = param_it->second;
            if (Value.IsHolding<T>())
            {
                return Value.UncheckedGet<T>();
            }
        }
    }

    // Then fallback to SdrNode.
    if (SdrNode)
    {
        if (const pxr::SdrShaderPropertyConstPtr Input = SdrNode->GetShaderInput(Name))
        {
            const pxr::VtValue& Value = Input->GetDefaultValue();
            if (Value.IsHolding<T>())
            {
                return Value.UncheckedGet<T>();
            }
        }
    }

    return DefaultValue;
}

std::string ResolveAssetPath(const pxr::VtValue& Value)
{