Let's consider a code example showing what would be allowed (or not) using different levels of inheritance: 1  class BaseClass {}; void freeStandingFunction(BaseClass* b); class DerivedProtected : protected BaseClass { DerivedProtected() { freeStandingFunction(this); // Allowed } };
Definition of Horizontal Axis. Horizontal means flat or level. Horizontal axis is the x-axis on a graph. The blue number line in the figure below is the x-axis, the horizontal axis.
Against-the-rule astigmatism â the horizontal meridian is steepest (a rugby ball or American football standing on its end). Oblique astigmatism â the steepest curve lies in between 120 and 150 degrees and 30 and 60 degrees. Irregular astigmatism â principal meridians are not perpendicular.