Imports github.com/deadsy/sdfx/vec/p2 github.com/deadsy/sdfx/vec/v2 github.com/deadsy/sdfx/vec/v2i github.com/deadsy/sdfx/vec/v3 github.com/deadsy/sdfx/vec/v3i github.com/hpinc/go3mf Standard library imports math