Method updateMaterials

Source/Falcor/Scene/Scene.cpp:1750–1799

    }

    IScene::UpdateFlags Scene::updateMaterials(bool forceUpdate)
    {
        // Update material system.
        FALCOR_ASSERT(mpMaterials);
        Material::UpdateFlags materialUpdates = mpMaterials->update(forceUpdate);

        IScene::UpdateFlags flags = IScene::UpdateFlags::None;
        if (forceUpdate || materialUpdates != Material::UpdateFlags::None)
        {
            flags |= IScene::UpdateFlags::MaterialsChanged;

            // Bind materials parameter block to scene.
            if (mpSceneBlock)
            {
                mpMaterials->bindShaderData(mpSceneBlock->getRootVar()[kMaterialsBlockName]);
            }

            // If displacement parameters have changed, we need to trigger displacement update.
            if (is_set(materialUpdates, Material::UpdateFlags::DisplacementChanged))
            {
                mDisplacement.needsUpdate = true;
            }

            // Check if emissive materials have changed.
            if (is_set(materialUpdates, Material::UpdateFlags::EmissiveChanged))
            {
                flags |= IScene::UpdateFlags::EmissiveMaterialsChanged;
            }

            // Update type conformances.
            auto prevTypeConformances = mTypeConformances;
            mTypeConformances = mpMaterials->getTypeConformances();
            if (mTypeConformances != prevTypeConformances)
            {
                flags |= IScene::UpdateFlags::TypeConformancesChanged;
            }

            // Pass on update flag indicating shader code changes.
            if (is_set(materialUpdates, Material::UpdateFlags::CodeChanged))
            {
                flags |= IScene::UpdateFlags::ShaderCodeChanged;
            }

            // Update material stats upon any material changes for now.
            // This is not strictly needed for most changes and can be optimized if the overhead becomes a problem.
            updateMaterialStats();
        }

        return flags;
    }

    IScene::UpdateFlags Scene::updateGeometry(RenderContext* pRenderContext, bool forceUpdate)
    {