GD&T Annotations (MBD) let you define geometric tolerances and datum references directly on the 3D model as part of a model-based definition workflow.
Start with Flatness and Datum to establish basic form control and reference geometry. Then use Profile, Position, Perpendicularity, Parallelism, Distance, and Annotation to attach the rest of the shipped MBD callouts to model geometry.
Are you interested in code?
Zoo Design Studio writes KCL behind the scenes. GD&T annotations use the gdt module in the KCL
standard library.
Want to find out more about the gdt module? Check it out in our
KCL docs.