NChartLinearInterpolator Class Reference Inherits from NChartInterpolator : NSObject Declared in NChartLinearInterpolator.h Overview The NChartLinearInterpolator class provides linear interpolator. If it is used, the animated values will changed in time as follows: v(t) = (1 - t) * v_from + t * v_to, where v_from, v_to are respectively the start and end values, t is the time.