This information is part of the Modelica Standard Library maintained by the Modelica Association.
atan3
Four quadrant inverse tangens (select solution that is closest to given angle y0)
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Four quadrant inverse tangens (select solution that is closest to given angle y0)
This function returns y = atan3(u1,u2,y0) such that
tan(y) = u1/u2 and
y is in the range: -pi < y-y0 < pi.
u2 may be zero, provided u1 is not zero. The difference to
Modelica.Math.atan2(..) is the optional third argument y0 that
allows to specify which of the infinite many solutions
shall be returned:
