Function haveHardwareOcclusionQueries

OpenCSG/src/opencsgRender.cpp:34–37

    namespace {

        bool haveHardwareOcclusionQueries() {
            return OPENCSG_HAS_EXT(ARB_occlusion_query)
                || OPENCSG_HAS_EXT(NV_occlusion_query);
        }

        Algorithm chooseAlgorithm(const std::vector<Primitive*>& primitives) {
            if (Algo::getConvexity(primitives) >= 2) {