CREATING PRINCIPLE 3D CURVES WITH DIGITAL TAPE DRAWING

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Download free Creating Principal 3D Curves with Digital Tape Drawing pdf. Previous systems have explored the challenges of designing an interface for automotive styling which combine the metaphor of 2D drawing using physical tape with the simultaneous creation and management of a corresponding virtual 3D model. These systems have been limited to only 2D planar curves while typically the principal characteristic curves of an automotive design are three dimensional and non-planar. We present a system which addresses this limitation. Our system allows a designer to construct these non-planar 3D curves by drawing a series of 2D curves using the 2D tape drawing technique and interaction style. These results are generally applicable to the interface design of 3D modeling applications and also to the design of arm's length interaction on large scale display systems.

In the automobile industry, designers create initial drawings of car body stylings on large scale upright surfaces that maintain scale correspondence to the intended real full-size car. These full scale drawings are created to allow designers and managers to evaluate the principal curves – the few essential curves that define the characteristic shape and styling – of a car design. Thus, it is absolutely essential to evaluate these principal curves without introducing scale artifacts that may occur should the work be done in reduced scale or on a conventional desktop sized display. Traditionally, these drawings have been created not by using pencil and paint, but with a technique called “tape drawing” where black photographic tape is laid onto the drawing surface. Given the large scale size of the drawings, tape drawing has several fundamental advantages over freeform sketching, including the ability to create smooth continuous curves without other physical aids like french curves.

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