MORE SPLINES

Splines can be used in several ways to develop games, one of those ways is to rig a virtual camera rail that the camera can follow. This is a built in feature in Unreal Engine 4

This is an example of the Camera rig rail, which uses spline(s) to create a path for the camera to follow. This, combined with Lerp can give off a wonderful effect for the camera, and can create a smooth cutscene. This can also be called Spline Interpolation.