Triangle rendering using direct evaluation

G - Physics – 06 – T

Patent

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G06T 15/00 (2011.01) G09G 5/36 (2006.01)

Patent

CA 2519346

This disclosure describes an apparatus, such as a wireless communication device, that applies a direct evaluation technique to render triangles for the 3D graphical environment. The apparatus includes a rendering engine that defines a rectangular area of pixels, referred to as a bounding box, that bounds the area to be rendered. The rendering engine evaluates coordinates associated with the pixels of the rectangular area to selectively render those pixels that fall within the triangular area. The direct evaluation triangle rendering algorithm may require fewer complex operations than the more computationally intensive interpolation process employed by other systems. As a result, the apparatus may present a 3D graphical environment while preserving as much as possible the available power.

L'invention concerne un appareil, tel qu'un dispositif de communication sans fil, mettant en oeuvre une technique d'évaluation directe pour rendre des triangles utilisés dans l'environnement graphique tridimensionnel. L'appareil selon l'invention comprend un moteur de rendu servant à définir une zone rectangulaire de pixels, appelée cadre de contour, qui encadre la zone à rendre. Le moteur de rendu évalue les coordonnées associées aux pixels de la zone rectangulaire pour rendre de manière sélective les pixels qui se trouvent à l'intérieur de la zone triangulaire. L'algorithme de rendu de triangle à évaluation directe nécessite moins d'opérations complexes que le processus d'interpolation qui est utilisé par d'autres systèmes et qui est plus intensif d'un point de vue informatique. L'appareil selon l'invention présente donc un environnement graphique tridimensionnel tout en économisant autant que possible la puissance disponible.

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