Instancing and Material Lookup with Omniverse Connector

Omniverse Developer
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2

Here’s some sample code for referencing USD files and transforming them:

Code for referencing USD files into a shot stage in C++ would be something like this:
        // Reference the "Models/Sphere.usd"
        {
            pxr::SdfPath pathRef = pathWorld.AppendChild(pxr::TfToken("RefSphere"));
            pxr::UsdPrim primRef = stage->OverridePrim(pathRef); // Create an "over".
            primRef.GetReferences().AddReference("Models/Sphere.usd");
            primRef.SetInstanceable(true); // Let the renderer instance the referenced part geometry if it's used more than once.
            pxr::UsdGeomXformable xform(primRef);
            xform.ClearXformOpOrder();
            pxr::GfVec3f translation(-1.25f, 0.0f, 0.0f); // Move to the left.
            pxr::UsdGeomXformOp xformOp = xform.AddTranslateOp(pxr::UsdGeomXformOp::PrecisionFloat); // Default would be PrecisionDouble.
            xformOp.Set(translation);
        }

As for referencing MDL files, if you know their location you can use the Connect Sample’s MDL shader specification code in the static void createMaterial(UsdGeomMesh meshIn) function.