Block- and band-oriented traversal in three-dimensional...

Details Block- and band-oriented traversal in three-dimensional... Block- and band-oriented traversal in three-dimensional...

G - Physics

06

T

G06T 11/40 (2006.01) G06T 15/00 (2006.01)

Patent

CA 2294323

A system and method for traversing and rendering a graphic primitive represented in screen space, employing block- and band-oriented traversal algorithms (1208, 1203) in texture mapping. Improved performance is achieved through burst-mode texture access and texture caching in connection with a texture map subdivided into squares. Block- and band-oriented traversal facilitates minimization of page breaks and texture cache swap-out. Improved determinism is facilitated by obviating the need for pixel sorting algorithms (1201). Improved re-use of retrieved data segments (1202) in burst-mode access is facilitated.

On décrit un système et un procédé permettant d'effectuer la traversée et le rendu d'une primitive graphique représentée dans un espace écran, dans lesquels on utilise dans le mappage de textures, des algorithmes de traversée (1208, 1203) orientés bloc et orientés bande. On améliore la performance par un accès à la texture en mode rafale et par la mise en mémoire cache de la texture en combinaison avec une carte de la texture subdividsée en carrés. La traversée orientée bloc et orientée bande permet de réduire au maximum les sauts de page et les extractions de la mémoire cache de texture. Le déterminisme amélioré résulte de l'élimination des algorithmes de triage (1201) des pixels. Ce système facilite la réutilisation améliorée de segments (1202) de données récupérés en mode d'accès par rafales.

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