INTRODUCTION
EnSight provides various modes that control global viewing behavior. Three of these modes are discussed here:
perspective/orthographic projection, bounding box display modes, and static lighting.
EnSight can display viewports in either perspective or orthographic projection. A perspective projection is how we
normally view the world: objects that are farther away appear smaller. An orthographic projection removes this effect:
objects appear the same size regardless of distance. The projection setting can be specified on a per-viewport basis.
By default EnSight draws every point, line, and polygon for every visible part each time the Graphics Window
updates. For very large models (or slow graphics hardware), this behavior leads to unresponsive manipulations since
the update lags behind the corresponding mouse motion. Fortunately, EnSight provides other display modes that
improve responsiveness. Fast Display mode displays all visible parts in a reduced fashion during interactive
manipulation. This can be a bounding box representation, a point cloud representation, a reduced polygon
representation, an invisible representation, or if using immediate mode - a percentage of each part’s elements.
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