void ModelMeshPartPayload::render(RenderArgs* args) const {    PerformanceTimer perfTimer("ModelMeshPartPayload::render");     if (!_model->_readyWhenAdded || !_model->_isVisible) {        return; // bail asap    }     gpu::Batch& batch = *(args->_batch);     if (!getShapeKey().isValid()) {        return;    }     auto locations =  args->_pipeline->locations;    assert(locations);     // Bind the model transform and the skinCLusterMatrices if needed    bool canCauterize = args->_renderMode != RenderArgs::SHADOW_RENDER_MODE;    _model->updateClusterMatrices(_transform.getTranslation(), _transform.getRotation());    bindTransform(batch, locations, canCauterize);     //Bind the index buffer and vertex buffer and Blend shapes if needed    bindMesh(batch);     // apply material properties    bindMaterial(batch, locations);     if (args) {        args->_details._materialSwitches++;    }     // Draw!    {        PerformanceTimer perfTimer("batch.drawIndexed()");        drawCall(batch);    }     if (args) {        const int INDICES_PER_TRIANGLE = 3;        args->_details._trianglesRendered += _drawPart._numIndices / INDICES_PER_TRIANGLE;    }} 

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