Function cubicInterpolate

cubicInterpolate(
    startValue: number,
    endValue: number,
    startTangent: number,
    endTangent: number,
    t: number,
): number
Parameters
- startValue: number
  Start value
- endValue: number
  End value
- startTangent: number
  Start tangent
- endTangent: number
  End tangent
- t: number
  Interpolation amount
Returns number
Interpolated value