MARK-IT: A Marking User Interface For Cutting Decomposition Time
Yang, Nicholas C., Andrew S. Forsberg, Jason F. Shepherd, Ricardo M. Garcia and Karl G. Merkley
Proceedings, 13th International Meshing Roundtable, Williamsburg, VA, Sandia National Laboratories, SAND #2004-3765C, pp.231-242, September 19-22 2004
13th International Meshing Roundtable
Willimasburg, Virginia, USA
September 19-22, 2004
Nicholas C. Yang and Andrew S. Forsberg
Brown University, Providence, RI, U.S.A.
Jason F. Shepherd and Ricardo M. Garcia
Sandia National Laboratories, Albuquerque, NM, U.S.A.
Karl G. Merkley
Elemental Technologies, Inc., American Fork, UT, U.S.A.
We present Mark-It, a marking user interface that reduced the time to decompose a set of CAD models exhibiting a
range of decomposition problems by as much as fifty percent. Instead of performing about 50 mesh decomposition
operations using a conventional UI, Mark-It allows users to perform the same operations by drawing 2D marks in the
context of the 3D model. The motivation for this study was to test the potential of a marking user interface for the
decomposition aspect of the meshing process. To evaluate Mark-It, we designed a user study that consisted of a brief
tutorial of both the non-marking and marking UIs, performing the steps to decompose four models contributed to us
by experienced meshers at Sandia National Laboratories, and a post-study debriefing to rate the speed, preference,
and overall learnability of the two interfaces. Our primary contributions are a practical user interface design for
speeding-up mesh decomposition and an evaluation that helps characterize the pros and cons of the new user interface.
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