G - Physics – 06 – T
Patent
G - Physics
06
T
G06T 15/80 (2011.01)
Patent
CA 2661177
Methods, systems, apparatus, and computer program/software code products, operable in a computer graphics system designed to render images and Io apply shading to images, enable the following: during rendering of an image, modifying the shading normal in the region of a corner of an object in the image, such that when shading is applied to the image, the shaded image is capable of providing to a human viewer, when view ing the comer in the image, the appearance or visual illusion of a rounded comer, wherein the modifying comprises: calculating an amount of modification to be applied to an original shading normal in the region of the comer to simulate the appearance of a given fillet radius R, the calculating comprising: interrogating surfaces within a distance R of the corner for their shading normal, and calculating a new normal that is a weighted blend between the shading normal of the original surface and the shading normal of the interrogated neighboring surface, thereby, by the shading effect, to simulate at render-time a rounding by varying the shading normal, creating a variation of the surface normal consistent with the appearance the object would have had. had it actuallv been rounded.
Procédés, systèmes, dispositifs et produits informatiques codés, programmes et logiciels, pouvant être mis en application dans un système informatique graphique conçu pour rendre des images et pour appliquer un ombrage à des images, ce qui permet de: modifier, pendant le rendu d'une image, la normale d'ombrage dans la zone d'un coin d'un objet de l'image, de sorte que, quand l'ombrage est appliqué à l'image, l'image ombrée est capable de procurer à un individu visualisant le coin de l'image, l'aspect ou l'illusion visuelle d'un coin arrondi. Cette modification consiste à calculer un niveau de modification à appliquer à une normale d'ombrage original dans la zone du coin afin de simuler l'aspect d'un rayon d'angle donné R. Ce calcul consiste à: interroger des surfaces à l'intérieur d'une distance R du coin afin de définir leur normale d'ombrage et calculer une nouvelle normale représentant un mélange pondéré entre la normale d'ombrage de la surface originale et la normale d'ombrage de la surface voisine interrogée, de manière à simuler un arrondi au moment du rendu par variation de la normale d'ombrage, création d'une variation de la normale de surface conforme à l'aspect de l'objet s'il avait été réellement arrondi.
Deeth Williams Wall Llp
Mental Images Gmbh
Nvidia Corporation
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