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Now showing items 21-30 of 42
Blending Rational B-Spline Surfaces
(Eurographics Association, 1989)
A method for blendin non uniform rational B-spline surface patches, either open or periodic, is developed. he blending surface is expressed in terms of an integral, bicubic B-spline patch. The blend ensures position and ...
Toward Realistic Formal Specifications for Non-Trivial Graphical Objects
(Eurographics Association, 1989)
Formal specification has long been advocated in programming methodology, and is becoming increasingly popular in computer graphics to characterise the semantics of components of graphics systems. Unfortunately, formal ...
Supporting Graphical Languages with Structure Editors
(Eurographics Association, 1989)
Graphical editors are used in numerous application fields for purposes like specification, design, modelling, or description of structures of various kinds. These editors handle the graphical representations based on objects ...
Anti-Aliasing by Successive Steps with a Z-Buffer
(Eurographics Association, 1989)
We present a method allowing to solve the three problems arising when a scene is displayed with the z-buffer algorithm. The proposed algorithm only requires one extra memory bit per pixel and delivers good quality images. ...
A Topological Map-Based Kernel for Polyhedron Modelers: Algebraic Specification and Logic Prototyping
(Eurographics Association, 1989)
This paper deals with the topology of surfaces, in the boundary representation of three dimensional objects. Orientable, not orientable, closed or open surfaces are efficiently described and handled when considered as ...
Hierarchical Texture Synthesis on 3-D Surfaces
(Eurographics Association, 1989)
This paper presents a new method for synthesizing hierarchical textures on 3-D surfaces. This method utilizes both a mapping technique for rendering the macroscopic structure on the surface and a generalization of the ...
On Reducing the Phong Shading Method
(Eurographics Association, 1989)
Today, the shading method of Phong plays an important role in the design of realtime image generation systems. Often, the model has been used in combination with a color interpolation, suppressing a main property of this ...
The Macro-Regions: An Efficient Space Subdivision Structure for Ray Tracing
(Eurographics Association, 1989)
Ray tracing is the usual image synthesis technique which allows rendering of specular effects. The use of space subdivision for ray tracing optimization is studied. A new method of subdivision is proposed : the macro-regions. ...
Forest of Quadtrees: An Object Representation for 3D Graphics
(Eurographics Association, 1989)
A forest of quadtrees is proposed as an alternative data structure for representing and manipulating 3D and 2.5D graphics. A data representation of a forest offers space savings over common quadtrees by concentrating the ...
MICRO-UIDT: A User Interface Development Tool
(Eurographics Association, 1989)
A user interlace development tool called Micro-UIDT is described. Micro-UIDT provides an interactive design environment fur the user interface designers. The designing language for defining user interfaces are visual and ...