Validation test for the block IDEAS.Controls.OBC.CDL.Reals.Line.
The input u varies from 0.0 to
+2.
The block outputs y = a + b u, where u
is an input and the coefficients a and b
are determined so that the line intercepts the two input points
specified by the two points x1 and f1,
and x2 and f2.
The parameters limitBelow and
limitAbove determine whether x1 and
x2 are also used to limit the input
u.