Texture mapping and other uses of scalar fields on...

Details Texture mapping and other uses of scalar fields on... Texture mapping and other uses of scalar fields on...

G - Physics

06

T

G06T 17/20 (2006.01) G06T 15/70 (2006.01)

Patent

CA 2299432

Three related methods are disclosed for defining smooth scalar fields on arbitrary polygonal meshes which can be consistently carried through the subdivision process allowing one to define and compute the value of scalar fields over an arbitrarily dense set of points on the limit surface. Applications of these techniques in computer graphics and computer animation include: (1) the definition of pseudo-coordinates for use in parametric shading including texture mapping; (2) the assignment of smoothly varying articulation weights over the control points of a model to more efficiently define the transformation of a highly detailed object or character under specific animation controls; and (3) the assignment of smoothly varying local parameters for specifying the local behavior of dynamic or quasi-static objects or surfaces.

L'invention concerne trois procédés apparentés servant à définir des champs scalaires lisses sur des mailles de polygone arbitraires pouvant être portées de façon constante à travers le processus de subdivision, ce qui permet de définir et de calculer la valeur des champs scalaires sur un ensemble de points à densité arbitraire sur la surface limite. Les mises en applications de ces techniques dans des graphiques et des animations informatiques consistent (1) à définir des pseudo-coordonnées afin de les utiliser en ombrage paramétrique comprenant un texturage; (2) à affecter des poids d'articulation à variations douces sur la totalité des points de contrôle d'un modèle afin de définir plus précisément la transformation d'un objet ou d'un caractère extrêmement détaillés soumis à des contrôles d'animation spécifiques; (3) à affecter des paramètres locaux à variations douces afin de déterminer le comportement local d'objets ou de surfaces dynamiques ou quasi-statiques.

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