Browsing EG1988 Proceedings (Technical Papers) by Title
Now showing items 6-25 of 41
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The Calculus of the Non-Exact Perspective Projection - Scene-Shifting for Computer Animation
(Eurographics Association, 1988)This paper shows the principle way to apply the, scene-shiftin technique of the classical film to computer animation. calculus is presented which is a modification of the well-known classical calculus of the perspective ... -
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(Eurographics Association, 1988) -
A Compositional Semantics for Graphics
(Eurographics Association, 1988)In this paper a theory for developing "intelligent" interactive graphic systems is detailed. The Fregean compositionality principle is enunciated for graphical representations. Geometrical symbols and relations receive ... -
Conic Beta-Splines with Local Tension Control for Interactive Curve Fitting
(Eurographics Association, 1988)Polynomial Beta-splines were introduced by Barsky as an extension of polynomial B-splines with bias and tension parameters which allow more flexibility in controlling shape in curve fitting. It is possible to show that a ... -
Construction and Animation of a Synthetic Actress
(Eurographics Association, 1988)This paper describes a method for creating and animating a synthetic actress. It emphasizes the methodology used to generate realistic images and motions. In particular, points which are often ignored in the literature are ... -
Conversion of Boundary Representations to Bintrees
(Eurographics Association, 1988)Methods for the conversion from boundary-representations to approximation models (especially the bintree model) are examined. A new algorithm for the conversion to the bintree model is presented. It employs an inheritence ... -
The Development of PHEX, a 3D Graphics Extension to X11
(Eurographics Association, 1988)Today, many computer applications require both 3 dimensional (3D) graphics and window management. The new ISO PHIGS [1] and GKS-3D [2] standards define functional interfaces for applications needing 3D graphics but do not ... -
Efficient Adaptive Subdivision of Bezier Surfaces
(Eurographics Association, 1988)The support of free-form surfaces by modem solid modeling systems has necessitated the development of hardware and algorithms for the interactive display of surface patches. This paper describes an algorithm for the display ... -
An Evaluation of CSG Trees Based on Polyhedral Solids
(Eurographics Association, 1988)Set operation on polyhedra is an important component of Geometric Modeling System (GMS) when a Constructive Solid Geometry (CSG) representation with polyhedral solid primitives is used. Output data will be the unique ... -
A Evalution of Some Three-Color Tiling Patterns
(Eurographics Association, 1988)Some new technologies for information display use discrete arrays of cells or picture elements. Each cell displays a single color and the colors do not overlap as they do on a CRT screen. Colored cells are distributed on ... -
Experimenting with a Parallel Ray-Tracing Algorithm on a Hypercube Machine
(Eurographics Association, 1988)A parallel space tracing algorithm is presented. It subdivides the scene into regions. These latter are distributed among the processors of an iPSC hypercube machine designed by Intel company. Each processor subdivides its ... -
An Expert System for Polyhedra Modelling
(Eurographics Association, 1988)Very often we wish to construct shapes according to some criteria, which are properties we want the object to possess. In this case explicit construction becomes an inadapted way of working. One would wish to obtain the ... -
Fast Algorithm for Polygon Clipping with 3D Windows
(Eurographics Association, 1988)Many applications which use 3D graphics, need 3D geometric modeling and hence polygon clipping against 3D Windows or general volumes. The disadvantages of existing clipping algorithms are that they are 2D, slow or produce ... -
Form-Factors for General Environments
(Eurographics Association, 1988)A new algorithm, based on the hemi-cube formulation, which calculates the form-factors required by the solution of the rendering equation, is presented. The concept of form-factors of the standard radiosity method is ... -
A Formal Specification of a Boundary Representation
(Eurographics Association, 1988)Geometric modellers are used in a wide spectrum of applications in computer graphics. As many other applications use the generated internal representation of solids, semantic correctness is of special importance. On the ... -
Fractal Approximation of 2-D Object
(Eurographics Association, 1988)We present some new techniques for shape approximation with fractals, using Iterated Function System, a powerful method which allows good control on the resulting fractal. The main point discussed here can be stated as ... -
Free-Form Surfaces Modeling by Evolution Simulation
(Eurographics Association, 1988)We present in this paper a procedural method for modeling free-form, planar surfaces subdivisions, which allows simulating evolutions of such subdivisions. This method is founded on the common principles deduced from ... -
G1 Smoothing Solid Objects by Bicubic Bezier Patches
(Eurographics Association, 1988)A general and unified method is presented for generating a wide range of 3D objects by smoothing the vertices and edges of a given polyhedron with arbitrary topology using bicubic Bezier patches. The common solution to the ... -
Generation of High-Quality Curve and Surface with Smoothly Varying Curvature
(Eurographics Association, 1988)A method for generating curves and surfaces which satisfy constraints of tangent directions and curvature at arbitrary points and which have smoothly varying curvature is introduced. The method is geometrical determination ... -
Grafields: Field-Directed Dynamic Splines for Interactive Motion Control
(Eurographics Association, 1988)This paper presents an interactive system for motion control that emphasizes object interaction. The fundamental mechanism provided to support interaction between objects is the field. We present a new technique called ...