2-D Overlay

William Briggs (stimpy++at++niesten.arc.nasa.gov)
Tue, 14 Jun 94 09:09:30 -0700

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Is it possible to do a two-dimensional overlay in a channel? Up until
now, I have drawn a crosshair with a draw callback. I transform to the
viewpoint and then in front of it. However, roundoff error causes the
crosshair lines to wiggle, forcing me to put them farther away. With
them farther away, they interact with the terrain, dissapearing behind
it when the viewpoint is too close.

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