Function compact16BitIndices

Source/Falcor/Scene/SceneBuilder.cpp:180–192

        }

        std::vector<uint32_t> compact16BitIndices(const std::vector<uint32_t>& indices)
        {
            if (indices.empty()) return {};
            size_t sz = div_round_up(indices.size(), (std::size_t)2); // Storing two 16-bit indices per dword.
            std::vector<uint32_t> indexData(sz);
            uint16_t* pIndices = reinterpret_cast<uint16_t*>(indexData.data());
            for (size_t i = 0; i < indices.size(); i++)
            {
                FALCOR_ASSERT(indices[i] < (1u << 16));
                pIndices[i] = static_cast<uint16_t>(indices[i]);
            }
            return indexData;
        }

        SceneCache::Key computeSceneCacheKey(const std::filesystem::path& path, SceneBuilder::Flags buildFlags)
        {