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Other Common Parameters

There are also a lot of parameters that are not shared by all tools, but have a similar meaning whenever used. When generating new tools the meaning of those parameters should not be overlayed.

The parameter -n always specifies an integer number controling the number of output points. Whenever there are comparisons of points in a tool there is the flag -eps as a tolerance, so that two points are seen as qual if all coordinates lie within an epsilon neighborhood of the other point. Different epsilon values can be specified for each coordinate using either -epsx, -epsy, -epsz or by specifying the coordinate number by using -eps0, -eps1 and so on. (The second method allows the user to handle sets with more than 3 dimensions.) The choice of the epsilon is often very important for the result due to the inaccuracy of number representation inside the computer.

Jens Trapp
Wed Jun 12 20:34:13 MET DST 1996