Interactive pen-and-ink rendering for implicit surfaces (original) (raw)

Shape & Tone Depiction for Implicit Surfaces

2010

We present techniques for rendering implicit surfaces in di fferent 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. Implicit surfaces provide important, mathematically precise information about surface properties and allow global calculations, such as point pertinence and distance evaluation, while, at the same time, also allow obtaining local di fferential properties such as normals and principal curvatures. Our approach is implemented using HRBF Implicits, a simple and compact representation, which 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 fiel...

Sketch based construction and rendering of implicit models

2005

Abstract We present an implicit modeling system as a tool for creating a wide range of aesthetic models. Because of their ability to form blends and produce both organic shapes as well as man-made objects, implicit surfaces are a good medium for artists seeking new ways to experiment with 3D modeling. Implicit models can be created using our sketch-based modeling tool Shapeshop and also by using a procedural interface.

Stylistic Rendering of Implicit Models

Abstract We present an implicit modeling system as a tool for the creation of a wide range of aesthetic models. Because of their ability to form blends and produce both organic shapes as well as man made objects, implicit surfaces are a good medium for artists seeking new ways to experiment with 3D modeling. Implicit models can be created using our sketch-based modelling tool Shapeshop as well as with a procedural interface.

Survey on Polygonization of Implicit Surfaces

2010

Implicit surfaces are commonly used in image creation, modelling environments, and scientific data visualization. In this paper we survey techniques for fast visualization of implicit surfaces. The main classes of visualization algorithms are identified along with the advantages of each in the context of the different types of implicit surfaces commonly used in Computer Graphics. We focus closely on polygonization methods as they are the most suited to fast visualization. Classification and comparison of existing approaches are presented using criteria extracted from current research. This enables identification of the best strategies from the point of view of a number of specific requirements such as speed, accuracy, quality or stylization.

Implicit Surfaces Seminar, Spring 2012

2013

Implicit surfaces are one technique for surface modeling in computer graphics. In this report, we survey some implicit surface papers, present some projects using implicit surfaces, and give our evaluation of this work.