Time frame additive product effects

For products with complicated geometries, this may result in many lines being visible on the screen at the same time, often resulting in a complex, confusing screen image. Hidden lines cannot be removed unless a surface or plane bounded by a the wire-frame geometry is described to the computer. This then allows it to determine which entities are behind that surface and therefore invisible. Additional CAD/CAM features and techniques are described later in this chapter to assist in organizing wire-frame entity information more effectively. 

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