Builds the easing function for a camera animation. An unknown or missing curve name falls back to
the historical ease-in-out cubic motion instead of throwing inside the animation loop - the name
may come from a scene config authored against an older curve list.
Builds the easing function for a camera animation. An unknown or missing curve name falls back to the historical ease-in-out cubic motion instead of throwing inside the animation loop - the name may come from a scene config authored against an older curve list.