## GtkCurve::set_gamma

void set_gamma(double

`gamma`);

Use this function to precisely control a curve using its gamma value.
The gamma value of a curves, directly correlates with its radius of
curvature. Hence, a gamma value of 1 will result in a straight line.
Values greater than 1 will result in bent curves above the straight
line, while values lesser than 1 give curves bent under the straight
line.

The curve type is automatically changed to `Free` when this function is
called.