Computer aided automated modeling of editable sketches

A system comprising:

• a non-transitory storage medium having instructions of a computer aided design program stored thereon;
• and
• one or more data processing apparatus configured to run the instructions of the computer aided design program to perform operations comprising:
• obtaining (i) a two-dimensional (2D) curve and (ii) predefined geometries;
• converting the 2D curve and the predefined geometries into a primitive sketch geometry by approximating free regions as segmented from the 2D curve to a set of 2D primitives so as to minimize a number of 2D primitives used in the primitive sketch geometry, wherein converting the 2D curve comprises
• processing a plurality of candidate segments determined based on segmenting the free regions according to identified points on the 2D curve that meet a threshold for curve contact with a geometry of the predefined geometries to determine a set of segments for the free regions, and
• fitting the set of segments to the set of 2D primitives;
• and
• providing the primitive sketch geometry for rendering, editing, and/or simulating at a computer-aided design program based on user input to construct a 3D model of an object for use in manufacturing a physical structure of the object using one or more computer-controlled manufacturing systems.

A non-transitory computer-readable medium encoding instructions operable to cause data processing apparatus to perform operations comprising:

• obtaining (i) a two-dimensional (2D) curve and (ii) predefined geometries;
• converting the 2D curve and the predefined geometries into a primitive sketch geometry by approximating free regions as segmented from the 2D curve to a set of 2D primitives so as to minimize a number of 2D primitives used in the primitive sketch geometry, wherein converting the 2D curve comprises
• processing a plurality of candidate segments determined based on segmenting the free regions according to identified points on the 2D curve that meet a threshold for curve contact with a geometry of the predefined geometries to determine a set of segments for the free regions, and
• fitting the set of segments to the set of 2D primitives;
• and
• providing the primitive sketch geometry for rendering, editing, and/or simulating at a computer-aided design program based on user input to construct a 3D model of an object for use in manufacturing a physical structure of the object using one or more computer-controlled manufacturing systems.