Application-independent accurate mouse placements on surfaces of arbitrary geometry

Harlen Costa Batagelo, Shin-Ting Wu
State University of Campinas, School of Electrical and Computer Engineering, Campinas, Sao Paulo, Brazil
XX Brazilian Symposium on Computer Graphics and Image Processing, 2007. SIBGRAPI 2007, p.19-26


   title={Application-independent accurate mouse placements on surfaces of arbitrary geometry},

   author={Batagelo, H.C. and Ting, W.S.},

   booktitle={Computer Graphics and Image Processing, 2007. SIBGRAPI 2007. XX Brazilian Symposium on},






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Most direct manipulation tasks rely on precise placements of the cursor on the object of interest. Commonly, this requires the knowledge of distinct application-dependent geometry attributes of this object computed on the CPU. In this work, we present a simple yet general GPU-based framework for computing such attributes without depending on application-specific algorithms. In particular, it provides, for each pixel of the rendered model, elements of discrete differential geometry that require only the vertex data and 1-ring connectivity of each vertex stored in video memory. We validate our framework by showing how, only by providing correct mouse placements even when the geometry is modified on GPU, it can support the implementation of many direct manipulation tasks presented on the literature. Implementation results are presented.
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