a180-baxter - DAB Interactive Haptic Painting with 3D...

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DAB: Interactive Haptic Painting with 3D Virtual Brushes Bill Baxter Vincent Scheib Ming C. Lin Dinesh Manocha Department of Computer Science University of North Carolina at Chapel Hill baxter,scheib,lin,dm @cs.unc.edu http://www.cs.unc.edu/ geom/DAB Abstract: We present a novel painting system with an intuitive haptic interface, which serves as an expressive vehicle for inter- actively creating painterly works. We introduce a deformable, 3D brush model, which gives the user natural control of complex brush strokes. The force feedback enhances the sense of realism and provides tactile cues that enable the user to better manipulate the paint brush. We have also developed a bidirectional, two-layer paint model that, combined with a palette interface, enables easy loading of complex blends onto our 3D virtual brushes to generate interesting paint effects on the canvas. The resulting system, DAB, provides the user with an artistic setting, which is conceptually equivalent to a real-world painting environment. Several users have tested DAB and were able to start creating original art work within minutes. Keywords: Haptics, Human Computer Interaction, Painting Sys- tems, Deformable Brush Model 1 Introduction The art of painting refers to the aesthetic aspects of a painterly work. The craft of painting deals with the study of materials, in- cluding paint medium, tools, supports, and methods, i.e. the ma- nipulation of materials to express an artist’s intent and purpose [May70]. The art and craft of painting are closely related: an artist cannot divorce one from the other. Nevertheless, recent technologi- cal advances in computer graphics have largely centered around the art of painting, with little attention being given to the craft . Commercial painting systems and recent research on the gen- eration of painterly works have mainly emphasized the appearance of the final product. However, the word ‘painterly’ also describes a fusion of feeling and action, sight and touch, purpose and paint, beyond merely producing an image that gives an artistic impression [May70]. Rather than focus primarily on the rendered appearance, there may be equal merit in recreating the “sight, touch, action and feel- ing” of the artistic process itself. By designing a setting for artists to freely and creatively express themselves, as they would in a tra- ditional painting environment, computer graphics can serve as a conduit to the craft as well. 1.1 Main Contribution Our primary goal is to provide an expressive vehicle for inter- actively creating original painterly works with computer systems. We present a physically-based, deformable 3D brush model, which gives the user control of complex brush strokes intuitively. The hap- tic feedback enhances the sense of realism and provides tactile cues that enable the user to better manipulate the paint brush. We have Figure 1: An original work created using DAB. (Rebecca Holm- berg, artist) also developed a bidirectional, two-layer paint model that, in com-
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