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.
Thereâs a pretty good writeup of the mathematics involved here. For the GY-521 oriented flat as shown, the X and Y axes lie in the horizontal plane and the Z axis is vertical. To compute orientation from the accelerometer, we rely on the fact that there is a constant gravitational pull of 1g (9.8 m/s^2) downwards.