Issue 5
Permanent URI for this collection
Browse
Browsing Issue 5 by Issue Date
Now showing 1 - 20 of 20
Results Per Page
Sort Options
Item Interactive Visualization of Implicit Surfaces with Singularities(Blackwell Publishers Ltd and the Eurographics Association, 1997) Rosch, Angela; Ruhl, Matthias; Saupe, DietmarThis paper presents work on two methods for interactive visualization of implicit surfaces: physically-based sampling using particle systems and polygonization followed by physically-based mesh improvement which explicitly makes use of the surface-defining equation. While most previous work applied to bounded manifolds without singularities and without boundary (topological spheres) we broaden the scope of the methods to include surfaces with such features, in particular cusp points and surface self-intersections. These aspects are not (yet) essential for computer graphics modelling with implicit surfaces but they naturally occur in simulations of interest in mathematical visualization. In this paper we use the Kummer family of algebraic surfaces as an example.Item 5th EG Workshop on DSV-IS: call for participation(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item General Assembly minutes(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item Eurographics 1998 Cover Competition(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item Impressions of SIGGRAPH '97: Los Angeles, August 3rd-8th 1997(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item Eurographics'98(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item Eurographics '97 Awards(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item Calendar of Events(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item Eurographics '97: Budapest, Hungary, September 4-8, 1997(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item Book Reviews(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item Eurographics '98: call for contributions(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item Isometric Texture Mapping for Free-form Surfaces(Blackwell Publishers Ltd and the Eurographics Association, 1997) Arad, Nur; Elber, GershonTexture mapping is a frequently exploited technique in computer graphics aimed at the emulation of high-resolution details in surfaces. In this paper we present a distance-ratios preservation method for bivariate raster texture mapping to free-form surfaces in an arbitrarily precise manner. The proposed method reduces the original general problem of computing the inverse of a three-dimensional parametric surface mapping into a problem of two-dimensional image warping. Several examples that demonstrate the proposed approach are also provided.Item Network Service(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item Editorial(Blackwell Publishers Ltd and the Eurographics Association, 1997) Coquillart, Sabine; Seidel, Hans-PeterItem Join Now!(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item Auditor's Report(Blackwell Publishers Ltd and the Eurographics Association, 1997)Item Skeletal Reconstruction of Branching Shapes(Blackwell Publishers Ltd and the Eurographics Association, 1997) Ferley, Eric; Cani-Gascuel, Marie-Paule; Attali, DominiqueWe present a new method to reconstruct an implicit representation of a branching object from a set of data points scattered on its surface. The method is based on the computation of a geometric skeleton inside the data set. This skeleton is simplified in order to filter noise and converted into skeletal elements - a graph of interconnected curves - that generate an implicit surface. We use Bezier triangles as extra skeletal elements to perform bulge free blends between branches while controlling the blend extent. The result is a smooth reconstruction of the object, that can be computed whatever its topology. The skeleton offers compact storage, and provides an underlying structure for the reconstructed object, making it easier to edit in a modeling or animation environment.Item A Survey of 3D Interaction Techniques(Blackwell Publishers Ltd and the Eurographics Association, 1997) Hand, ChrisRecent gains in the performance of 3D graphics hardware and rendering systems have not been matched by a corresponding improvement in our knowledge of how to interact with the virtual environments we create; therefore there is a need to examine these further if we are to improve the overall quality of our interactive 3D systems. This paper examines some of the interaction techniques which have been developed for object manipulation, navigation and application control in 3D virtual environments. The use of both mouse-based techniques and 3D input devices is considered, along with the role of feedback and some aspects of tools and widgets.Item Multiple Segment Line Scan-conversion(Blackwell Publishers Ltd and the Eurographics Association, 1997) Chen, Jim X.We present a new method for scan-converting a straight line. A scan-converted straight line may contain many pixel segments of identical shapes. Therefore, instead of scan-converting the whole line step by step, we can scan-convert multiple segments of a line through copying and replicating. With a few modifications to the existing algorithms, we can significantly speed up the scan-conversion process. The algorithm can be implemented in the hardware, further speeding up the process. The hardware design for the new algorithm is provided. We prove that we can speed up all existing line scan-conversion algorithms on the average 3 times.Item 9th EG Workshop on Rendering: call for participation(Blackwell Publishers Ltd and the Eurographics Association, 1997)