EG UK Theory and Practice of Computer Graphics 2010
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Browsing EG UK Theory and Practice of Computer Graphics 2010 by Subject "Categories and Subject Descriptors (according to ACM CCS): Computer Graphics [I.3.3]: Line and Curve Generation"
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Item ID-Based Rendering of Silhouettes on GPU(The Eurographics Association, 2010) Diktas, Engin Deniz; Sahiner, Ali Vahit; John Collomosse and Ian GrimsteadWhen rendering object-silhouettes preprocessing is generally done primarily on the CPU. To this end primitive normals must be made consistent and the silhouette-edges need to be extracted every time the view-point is changed. In this paper we propose a pure image-based GPU-method where IDs of triangles are rendered to a texture and silhouettes are extracted based on the information stored in that texture. With this method the geometry does not need to be preprocessed or reprocessed when the view-point or the geometry is changed. Another important advantage of the proposed method over any Z-buffer based method is that it does not require any threshold value to compare against the difference between depth-values of the neighboring pixels which is difficult to adjust in perspective projection.