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Re-drawing (re-rendering) changing

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Joined: 2010-12-11

In order to have my collection of IndexedGeometryArray points (and designated special normals) drawn and filled in, my program will make a call to the NormalGenerator Class.
If the object itself is to change by the stretching and moving of a defining point during runtime, to acheive a line or a surface change, does one just call the NormalGenerator multiple times?

However won't this slow down the program to the point of lurching?

Is this the ideal way to handle run time redrawing (re-rendering)? What should one do?