public void setOuterConeAngle(float angle)
    {
        setFloat("outer_cone_angle", (float) Math.cos(Math.toRadians(angle)));
        mChanged.set(true);
    }
public void setOuterConeAngle ( float angle ) { setFloat ( "outer_cone_angle" , ( float ) Math . cos ( Math . toRadians ( angle ) ) ) ; mChanged . set ( true ) ; }
Set the inner angle of the spotlight cone in degrees.

Beyond the outer cone angle there is no illumination.
The underlying uniform "outer_cone_angle" is the cosine
of this input angle. If the inner cone angle is larger than the outer cone angle
there will be unexpected results.
@see #setInnerConeAngle(float)
@see #getOuterConeAngle()