Importance

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Abstract

An area-of-effect control is associated with a given graphical user interface tool and comprises a circle with a hemisphere superimposed on the circle's diameter. The control's geometry is changed by a user to vary an effect of the tool in the graphical user interface. Thus, for example, the user may change the diameter of the hemisphere, for example, to change an area that is paint-brushed by the tool; or, the user may vary the height or depth of the hemisphere to change the influence of the tool, such as the amount painted. The diameter and height may be varied at the same time. In addition, the hemisphere may be dragged in a negative manner, i.e., below an equator of the circle, to indicate that material may be subtracted from the virtual canvas. Thus, the equatorial circle of the control is used to provide a first (e.g., paintbrush) effect, and the hemisphere of the control is used to provide a second (e.g., a material addition or subtraction, or some other push/pull manipulation) effect. The control may change dynamically dependent upon the particular effect desired or tool chosen.

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First Claim