Shading computer-generated objects using generalized shading...

G - Physics – 09 – G

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G09G 5/02 (2006.01) G06T 15/00 (2006.01)

Patent

CA 2527053

Computer-generated objects (201) are tessellated into generalized shading regions (203) having any number of vertices (120). The shading regions (201) are passed to a shader (102) via a generalized parametric scheme that accommodates shapes having different number of vertices (120). The shader (102) determines and assigns color values (107) to the exact area defined by each shading region (201), without requiring the use of approximations such as bounding boxes or ellipsoids. The use of generalized shading regions (201) facilitates greater flexibility and accuracy in shading regions (201).

Ce procédé consiste à incorporer par tessellation des objets (201) créés par ordinateurs dans des zones d'ombrage (203) généralisées comprenant un nombre quelconque de sommets (120). Ces zones d'ombrage (201) sont transférées vers un nuanceur (ou shader) (102) par l'intermédiaire d'un modèle paramétrique généralisé compatible avec des formes présentant différents nombres de sommets (120). Le nuanceur (102) détermine et attribue des valeurs chromatiques (107) à la zone exacte définie par chaque zone d'ombrage (201), sans nécessiter l'utilisation d'approximations tels que cadres d'objets ou ellipsoïdes. L'utilisation de ces zones d'ombrage (201) généralisées augmente la flexibilité et la précision des zones d'ombrage (201).

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