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B.2 Rectangular Patterns
Similarly a general rectangle
{(x_{1}, y_{1}),(x_{2}, y_{2}),(x_{3}, y_{3}),(x_{4}, y_{4})}
in
^{2} can always be transformed to the unit rectangle
{(0, 0),(1, 0),(0, 1),(1, 1)} by the transformation (B.2).
For rectangular patterns the integral in (B.1) equals to
whereby REC1 refers now to the unit rectangle and
the coefficients
,
and
are given by (B.5) again. The function
I_{}(,) is calculated to

(B.6) 
Heinrich Kirchauer, Institute for Microelectronics, TU Vienna
19980417