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In the following context, all the symbol “/” is the relationship of OR. For example, X/U
represents that the result is either X or U, both of which cannot simultaneously be. N represents
parameter value, for example, Xn expresses that n is the following parameter. [] means optional
context, which can be selected or not.
10.2 Coordinate System
This system uses right-hand Descartes coordinate system acquiescently, as the figure 10.1
shows.
Y
X
Descartes coordinate
system
Fig 10.1 Descartes coordinate system
Of course, the system also can be defined coordinate system by user, referencing “8.7.4
Coordinate definition”.
