Shape and tone depiction for implicit surfaces

Emilio Vital Brazil, Ives Macêdo, Mario Costa Sousa, Luiz Velho, Luiz Henrique de Figueiredo
2011 Computers & graphics  
We present techniques for rendering implicit surfaces in different pen-and-ink styles. The implicit models are rendered using point-based primitives to depict shape and tone using silhouettes with hidden-line attenuation, drawing directions, and stippling. We present sample renderings obtained for a variety of models. Furthermore, we describe simple and novel methods to control point placement and rendering style. Our approach is implemented using HRBF Implicits, a simple and compact
more » ... ion, that has three fundamental qualities: a small number of point-normal samples as input for surface reconstruction, good projection of points near the surface, and smoothness of the gradient field. These qualities of HRBF Implicits are used to generate a robust distribution of points to position the drawing primitives.
doi:10.1016/j.cag.2010.09.017 fatcat:bj7o6p5ij5cdvpddtcw4fzq5z4