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Proceedings of CAD'17, 2017, 60-64
3D Object Sculpting using NURBS Surfaces and Leap Motion Controller

Miri Weiss Cohen, Chen Vrubel, Boris Fradlis, Braude College of Engineering

Abstract. 3D Sculpting (also known as Digital Sculpting) is the use of software which offers tools for shape modeling and manipulation of digital objects as if they were made of a real-life substance such as clay. Designers and engineers often desire to touch the surface in a CAD system to model and modify its' shape. The user intuitively uses his hands to express the intended changes and manipulations. In the past two decades, Human Computer Interaction (HCI), has been in great use to convey the idea of interpreting human gestures and intentions using a computer system. This work uses HCI with leap motion controller for shape modeling and modification of control points on NURBS and B-Spline surfaces to achieve the desired intended shape. This process aims to mimic the natural process of human CAD design. While most of the 3D sculpting tools use mesh-based geometry, in which an object is represented by an interconnected surface mesh of polygons, our system implements the shape modeling, modifications and manipulations on NURBS surfaces, allowing the advantage of their representations. The surfaces are deformed by the user, which can select an area of influence, in a flexible manner. Varying from one selected control point allowing a local changes, to a group of control points emanating a broader area to be deformed. 

Keywords. 3D sculpting, Leap Motion controller, HCI, NURBS surfaces

DOI: 10.14733/cadconfP.2017.60-64