Line draw pre-clipping method

Details Line draw pre-clipping method Line draw pre-clipping method

G - Physics

06

T

G06T 11/20 (2006.01) G06T 15/30 (2006.01)

Patent

CA 2060039

A method for drawing lines on a graphics device in such manner in that only those points lying inside a specified rectangular area of the device are drawn. Predetermined digital outcodes are generated for defining the endpoints of the lines and a decision is made whether to draw or not draw the lines based on the relationship of the endpoints with respect to both the specified rectangular area of the device, and a second larger rectangular area of the device.

L'invention est une méthode de traçage de traits pour dispositif graphique dans laquelle seuls les points situés à l'intérieur d'un rectangle donné sur le dispositif sont inscrits. Des codes d'expédition numériques prédéterminés sont produits pour définir les points terminaux des lignes et la décision de tracer ces lignes ou non est basée sur la position entre ces points terminaux par rapport au rectangle donné sur le dispositif, et à un second rectangle plus grand qui est également sur le dispositif.

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