By N. Magnenat-Thalmann, D. Thalmann (auth.), Günter Enderle, Michel Grave, Frank Lillehagen (eds.)

ISBN-10: 3540138048

ISBN-13: 9783540138044

ISBN-10: 3642465145

ISBN-13: 9783642465147

This publication is the 6th factor within the EurographicSeminars sequence. This sequence has been organize through Eurographics, the eu organization for special effects, with a view to disseminate surveys and learn effects out of the sector of special effects. special effects represent a strong and flexible software for varied program components. The swiftly expanding use of special effects strategies and structures in lots of components is attributable to the supply of extra strong at reduce prices,' through the concise specification of special effects Interfaces in commonly·.agreed criteria, and through the inven­ tion of recent and infrequently outstanding tools and algorithms for com­ place andpreserit~ti6n of pictJres and for graphical interplay. whereas s,o~e problems with this se.ries comprise most modern examine effects, e.g. the problems in window administration structures or consumer interface deal with­ ment platforms, this publication has the nature of a cutting-edge survey on vital parts .of special effects. ranging from present perform and agreed consens, it is going to bring about the most recent achievements during this box. The contributions during this factor are principally in response to tutorials and seminars held on the Eurographics meetings 1984 in Copen­ hagen and 1985 in Nice.

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Dons 10 creation des mouvements 3. dens Ie coloriage et Ie gouachage 4. dans Ie tournage 5. dans la postproduction 1. 5i on considere les systemes d'animation par ordinateur, on peut definir 5 niveaux de systemes: niueau 1 systemes utilises pour creer, colorier et modifier des dessins; ils ne prennent pas Ie temps en consideration nlueau 2 systemes permettant de calculer des dessins intermediaires (inbetweens) et de deplacer des Objets Ie long d'une trajectoire niue8U 3 systemes prevoyant des operations applicables sur des Objets et des mouvements de cameros virtuelles nlueau 4 systemes permettont de definir des acteurs (objets doues d'onimotion propre) nlueau 5 systemes extensibles, bases sur 10 connoissonce d'opprentissage, bases sur l'intelligence artificielle et doues On sepore aussi tres souvent l'animation par ordinateur en animation assistee par ordinateur et en animation modelisee.

On distingue deux grands types de projections: 113 projection parallele (Fig. le (Fig. 5b). dons les deux cos, 10 projection de 1'objet s'obtient en foisont passer des droites (les projecteun) par choQue point de 1'objet et en cherchont 1'intersection avec Ie plan de vue. Dons Ie cos d'une perspective, toutes les lignes emanent d'un seul point: Ie centre de projection. Pour une projection parollele, to utes les droites sont poralleles une direction de projection. Si 10 direction de projection est perpendiculaire au plan de vue, on a une projection orthographique sinon elle est oblique.

Dans Ie tournage 5. dans la postproduction 1. 5i on considere les systemes d'animation par ordinateur, on peut definir 5 niveaux de systemes: niueau 1 systemes utilises pour creer, colorier et modifier des dessins; ils ne prennent pas Ie temps en consideration nlueau 2 systemes permettant de calculer des dessins intermediaires (inbetweens) et de deplacer des Objets Ie long d'une trajectoire niue8U 3 systemes prevoyant des operations applicables sur des Objets et des mouvements de cameros virtuelles nlueau 4 systemes permettont de definir des acteurs (objets doues d'onimotion propre) nlueau 5 systemes extensibles, bases sur 10 connoissonce d'opprentissage, bases sur l'intelligence artificielle et doues On sepore aussi tres souvent l'animation par ordinateur en animation assistee par ordinateur et en animation modelisee.

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Advances in Computer Graphics I by N. Magnenat-Thalmann, D. Thalmann (auth.), Günter Enderle, Michel Grave, Frank Lillehagen (eds.)


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