It is known that certain Catmulb-Rom splines [7] interpolate their control vertices and share many properties such as affine invariance, global smoothness, and local control with B-spline curves;they are therefore of ...
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This paper describes and evaluates the design of four virtual controllers for use in rotating three-dimensional objects using the mouse. Three of four of these controllers are "new" in that they extend tradi...
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Chaotic dynamics can be used to model shapes and render textures in digital images. This paper addresses the problem of how to model geometrically shapes and textures of two dimensional images using iterated function ...
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The major process affecting the configuration and evolution of terrain is erosion by flowing water. Landscapes thus reflect the branching patterns of river and stream networks. The network patterns contain information...
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Current affordable architectures for high-speed display of shaded 3D objects operate orders of magnitude too slowly. Recent advances in floating point chip technology have outpaced polygon fill time, making the memory...
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Experimental software tools are described for implementing auto-updating, a method of transporting information between a document and multiple databases. Such information may include technical data, formatting markups...
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The problem of positioning and manipulating three dimensional articulated figures is often handled by ad hoc techniques which are cumbersome to use. In this paper, we describe a system which provides a consistent and ...
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This paper discusses work occurring in the hypercube simulation laboratory and visualization schemes for concurrent simulation. The principle contribution of this work is that of a cost effective technical approach to...
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I treat three related subjects: virtual-worlds research-the construction of real-time 3-D illusions by computergraphics;some observations about interfaces to virtual worlds;and the coming application of virtual-world...
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ISBN:
(纸本)0201142376
I treat three related subjects: virtual-worlds research-the construction of real-time 3-D illusions by computergraphics;some observations about interfaces to virtual worlds;and the coming application of virtual-worlds techniques to the enhancement of scientific computing. We need to design generalized interfaces for visualizing, exploring, and steering scientific computations. Our interfaces must be direct-manipulation, not command-string;interactive, not batch;3-D, not 2-D;multi-sensory, not just visual. We need generalized research results for 3-D interactive interfaces. More is known than gets reported, because of a reluctance to share "unproven" results. I propose a shells-of-certainty model for such knowledge.
This paper describes a method for extracting arbitrarily oriented text in documents containing both text and graphics. The technique presented is inspired by the tracking algorithms frequently found in raster to vecto...
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