ScalarInterpolator { eventIn SFFloat set_fraction exposedField MFFloat key [] exposedField MFFloat keyValue [] eventOut SFFloat value_changed }Explanation :
This node linearly interpolates among a set of SFFloat values. This interpolator is appropriate for any parameter defined using a single floating point value, e.g., width, radius, intensity, etc. The keyValue field must contain exactly as many numbers as there are keyframes in the key field.