A SKETCH-BASED DESIGN SYSTEM, APPARATUS, AND METHOD FOR THE CONSTRUCTION AND MODIFICATION OF THREE-DIMENSIONAL GEOMETRY

摘要

Methods, apparatuses, and systems for sketch-based design, construction, and modification of three-dimensional geometry, including a computer drawing system (10), comprising a two dimensional input device (12), a display device (14), and a processor (16) connected to the input device (12) and the display device (14). The processor (16) includes memory (18) containing computer readable instructions which, when executed, cause the processor (16) to define a three dimensional shape model, receive from the two dimensional input device (12) an input indicative of a two dimensional hand drawn element, map the two dimensional hand drawn element to a corresponding portion of the three dimensional shape model, and modify the corresponding portion of the three dimensional shape model to resemble the two dimensional hand drawn element.