Oscillation (Expression Function Reference)

The Function Profiles Oscillation command in the expression editor inserts the token oscil(<sf>,<ef>,<sp>,<ep>,<interp>,<sa>,<ea>,<interp>) at the insertion point in the editing pane. This token generates a complex oscillating function. Replace the dummy arguments as follows:

<sf>	Replace with an expression for the start frame of the oscillation. The value is 0 before this frame.
<ef>	Replace with an expression for the end frame of the oscillation. The value is 0 after this frame.
<sp>	Replace with an expression for the starting half-period (half-wavelength) of the oscillation in frames.
<ep>	Replace with an expression for the first half-period of the final oscillation in frames.
<interp>	Replace with LinearInterp for a linear interpolation between <sp> and <ep>, or with SplineInterp for a spline (curved) interpolation. You can use the Function Constant submenu to insert these strings.
<sa>	Replace with an expression for the starting amplitude (maximum height) of the oscillation in SOFTIMAGE units.
<ea>	Replace with an expression for the end amplitude (maximum height) of the oscillation in SOFTIMAGE units.
<interp>	Replace with LinearInterp for a linear interpolation between <sa> and <ea>, or with SplineInterp for a spline (curved) interpolation. You can use the Function Constant submenu to insert these strings.

Example

oscil(10,90,5,15,LinearInterp,1,20,SplineInterp)

Generates an oscillation that starts at frame 10 and ends at frame 90. The first half-period lasts 5 frames and grows linearly with the second-to-last half-period lasting 15 frames. The amplitude is initially 1 SOFTIMAGE unit and grows with a spline interpolation to 20.