Moved some six module functions and backports_functools_lru_cache module under geomdl directory Removed typing dependency (no time to add all typing hints, see docs for input and output types) Refactored imports, minimized internal dependencies Code rearrangement for some internal functions Refactored operations module (no API change) Updated multi module Updated elements module to make it consistent between its classes (minor API change) Improved dict-type file formats (JSON, YAML, CFG) to support trim curves and more (backwards compatible) Updated exchange_vtk.export_polydata to support tessellated surfaces and geometry containers Refactored tessellation module (internal API change, user API is the same and comes with improvements) Added tessellate.QuadTessellate class Added == and !=operators to SplineGeometry classes Added freeform module Improved the surface trimming algorithm to handle edge cases Added trimming module to fix different types of trim curves (open, multi-curve, etc.) Added an option to set trim curve sense; i.e. sense = 0 means trim inside, sense = 1 means trim outside Improved VTK visualization module to better handle surface and volume plots Added voxel visualization option to VTK visualization module Registered mode keypress events to VTK visualization module Added an option to generate custom visualization configuration while generating the visualization object General bug fixes and performance improvements Added more tests Documentation updates Released rwsat Please note that trimming module is still experimental and it might not work with all types of trims. Module documentation will be released soon.