Methods, systems, and apparatus, including medium-encoded computer program products, for computer aided design of physical structures include, in at least one aspect, a fully automatic method of converting a generative design into an editable, watertight B-Rep by leveraging the generative solver input and representation to: (1) embed the exact input solid boundary surfaces where the design coincides with the input, (2) approximate everywhere else the design boundary with globally smooth, editable organic surfaces, and (3) join all surfaces to form a generative design output B-Rep.

Methods, systems, and apparatus, including medium-encoded computer program products, for computer aided design of physical structures include, in at least one aspect, a fully automatic method of converting a generative design into an editable, watertight B-Rep by leveraging the generative solver input and representation to: (1) embed the exact input solid boundary surfaces where the design coincides with the input, (2) approximate everywhere else the design boundary with globally smooth, editable organic surfaces, and (3) join all surfaces to form a generative design output B-Rep.

A system and method for transferring a part being machined from a first fixture to a second fixture so that an un-machined side of the part can be exposed for machining, where the first fixture is secured to a first actuator and the second fixture is secured to a second actuator. The method includes securing the part to the first fixture and machining the part on sides of the part except a side of the part coupled to the first fixture. The method slides the first actuator away from the second actuator, operates the first actuator and the second actuator so that the part secured to the first fixture is aligned with the second fixture, slides the first actuator back towards the second actuator, secures the part to the second fixture and releases the part from the first fixture, and slides the first actuator away from the second actuator again.

A system and method for transferring a part being machined from a first fixture to a second fixture so that an un-machined side of the part can be exposed for machining, where the first fixture is secured to a first actuator and the second fixture is secured to a second actuator. The method includes securing the part to the first fixture and machining the part on sides of the part except a side of the part coupled to the first fixture. The method slides the first actuator away from the second actuator, operates the first actuator and the second actuator so that the part secured to the first fixture is aligned with the second fixture, slides the first actuator back towards the second actuator, secures the part to the second fixture and releases the part from the first fixture, and slides the first actuator away from the second actuator again.