The Graphics PARCUM* System: A 3D Memory Based Computer Architecture for Processing and Display of Solid Models

Jackèl, Dr.-Ing. habil. Dietmar

doi:10.1111/j.1467-8659.1985.tb00183.x

“…[10][11][12], set n to maximum of these maxima; Calculate initial difference vectors Ax, Ay, Az by Eq. 14; Set A°x, A°y, A°z to0; Both algorithms CURVE and FAST CURVE handle the three coordinates independently, and therefore one, two and/or three coordinates may be simultaneously changed at any step.…”

Section: ~ Computer Graphics Volume 21 Number 4 July 1987mentioning

confidence: 99%

“…• Cubic parametric curves • Bicubic parametric surface patches a Tricubic parametric volumes There are four voxel-image space architectures, CUBE [13][14][15], GODPA [11], PARCUM [12], and 3DP 4 [21], and many other voxel-based software systems that have been reported in the literature. The theme of these systems is that the 3D inherently continuous scene is discretized, sampled, and stored in a large 3D cubic frame buffer of unit cells called volume elements or voxels.…”

Section: Introductionmentioning

confidence: 99%

Efficient algorithms for 3D scan-conversion of parametric curves, surfaces, and volumes

KaufmanArie

¹

1987

SIGGRAPH Comput. Graph.

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Three-dimensional (SD) scan-conversion algorithms,, that scan-convert 3D parametric objects into their discrete voxelmap representation within a Cubic Frame Buffer (CFB), are presented. The parametric objects that are studied include Bezler form of cubic parametric curves, blcubic parametric surface patches, and trieublc parametric volumes. The converted objects in discrete 3D space maintain pre-defined application-dependent connectivity and fidelity requirements.The algorithms introduced here employ third-order forward difference techniques. Efficient versions of the algorithms based on first-order decision mechanisms, which employ only integer arithmetic, are also discussed. All algorithms are incremental and use only simple operations inside the inner algorithm loops. They perform scan-conversion with computational complexity which is linear in the number of voxels written to the CFB. All the algorithms have been implemented as part of the CUBE Architecture~ which is a voxelbased system for 3D graphics.

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“…• Cubic parametric curves • Bicubic parametric surface patches a Tricubic parametric volumes There are four voxel-image space architectures, CUBE [13][14][15], GODPA [11], PARCUM [12], and 3DP 4 [21], and many other voxel-based software systems that have been reported in the literature. The theme of these systems is that the 3D inherently continuous scene is discretized, sampled, and stored in a large 3D cubic frame buffer of unit cells called volume elements or voxels.…”

Section: Introductionmentioning

confidence: 99%

Efficient algorithms for 3D scan-conversion of parametric curves, surfaces, and volumes

Kaufman

¹

1987

Proceedings of the 14th Annual Conference on Computer Graphics and Interactive Techniques

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Three-dimensional (SD) scan-conversion algorithms,, that scan-convert 3D parametric objects into their discrete voxelmap representation within a Cubic Frame Buffer (CFB), are presented. The parametric objects that are studied include Bezler form of cubic parametric curves, blcubic parametric surface patches, and trieublc parametric volumes. The converted objects in discrete 3D space maintain pre-defined application-dependent connectivity and fidelity requirements.The algorithms introduced here employ third-order forward difference techniques. Efficient versions of the algorithms based on first-order decision mechanisms, which employ only integer arithmetic, are also discussed. All algorithms are incremental and use only simple operations inside the inner algorithm loops. They perform scan-conversion with computational complexity which is linear in the number of voxels written to the CFB. All the algorithms have been implemented as part of the CUBE Architecture~ which is a voxelbased system for 3D graphics.

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“…1024 · 1024 · 1024 Bit erreichen! Spezielle Hardware-Lösungen in Form von Voxel-Maschinen erleichtern das Arbeiten mit diesen Datenmengen[Jack85].In[Fuch89] werden die Verfahren unterschieden in flächengenerierende Techniken, binäre VoxelTechniken und Volume-Rendering Techniken. Neuere Verfahren arbeiten meist nach der Strategie der Strahlverfolgung (ray casting) und nehmen damit die erhöhten Rechenzeiten in Kauf[Levo88].…”

unclassified

Schnelle Visualisierungsmethoden für den Grafisch-Interaktiven Ingenieurentwurf/ Fast Visualization Techniques for the Graphical Interactive Engineering Design

Meißner¹

1991

it - Information Technology

0

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Dr.-Ing. G.-A. Meißner hat an der TU Berlin Schiffs-und Meerestechnik studiert. Seit 1985 arbeitet er am CAD-Labor des FB Verkehrswesen der TU Berlin im Sonderforschungsbereich 203 als wissenschaftlicher Angestellter im Teilprojekt "Farbgraphische Entwurfs-und Analyseverfahren". Arbeitsgebiete: Schiffstechnik, Computer· Aided Design, Computer Graphics Der Einsatz schneller Visualisierungsmethoden für den grafisch-interaktiven Entwurfsprozeß gewinnt im Bereich des rechnergestützten Entwerfens (Computer Aided Design, CAD, [Spur84]) zunehmend an Bedeutung. Für die Integration der Visualisierung von wissenschaftlichen Berechnungsergebnissen (Visualization in Scientific Computing, ViSC, [Corni87]) in den interaktiven Entwurfsprozeß reicht der Einsatz konventioneller Grafiksysteme oft nicht aus. Der Einsatz der Visualisierungsmethoden im CAD stellt besondere Anforderungen an die Verarbeitungsgeschwindigkeit der Berechnungs-und Darstellungsverfahren aus Gründen der Benutzerfreundlichkeit und der Interaktivität des Systems. Es wird eine Systematik vorgestellt über die Auswahl von verschiedenen grafischen Darstellungsmitteln zur Präsentation beliebiger physikalisch-ingenieurrelevanter Berechnungs-oder auch Meßergebnisse. Es handelt sich dabei um skalare, vektorielle und tensorielle Daten, die an linien-, flächen-oder volumenorientierten Geometrien gekoppelt sind. Die Ergebnisse fließen in ein objektorientiertes, grafisch-interaktives Entwurfssystem ein, wobei der Benutzerschnittstelle für die Akzeptans des Systems eine besondere Bedeutung zukommt und das anhand einer offenen Systemarchitektur konzipiert wird. In dem Entwurfssystem kommen moderne, objektorientierte Interaktionsverfahren zum Einsatz, die einen schnellen Bildaufbau und eine schnelle Bildänderung erlauben. Constructing fast visualization techniques, as a means for computer-aided graphical interactive design, is nowadays becoming a research topic of increasing interest in the area of computer-aided design (CAD).This task however cannot be accomplished in the context of a conventional graphical system. This is due to the fact that integrating visualization-inscientific-computing (ViSC) within an interactive design process is very demanding from the point of view of processing time of the representation algorithms as a prerequisite of user-friendliness and interactivity of the graphical interactive design system.A systematic process is then firstly developed for selecting alternative graphical-representation primitives and attributes for depicting physical or engineering-relevant calculation or measurement results. The associated data interface involves scalar, vectorial, or tensorial data corellated to line-, surface-, or volume-oriented geometries.The obtained results are treated by an objectoriented graphical interactive design system in which the user interface is of special importance for the acceptance of the system and which is conceived on the basis of an open-system architecture. In this connection, fast picture generation and fast picture updating are ...

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The Graphics PARCUM* System: A 3D Memory Based Computer Architecture for Processing and Display of Solid Models

Cited by 47 publications

References 3 publications

Efficient algorithms for 3D scan-conversion of parametric curves, surfaces, and volumes

Efficient algorithms for 3D scan-conversion of parametric curves, surfaces, and volumes

Efficient algorithms for 3D scan-conversion of parametric curves, surfaces, and volumes

Schnelle Visualisierungsmethoden für den Grafisch-Interaktiven Ingenieurentwurf/ Fast Visualization Techniques for the Graphical Interactive Engineering Design

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