Editing Curves and Curve Segments

Smoothing a Segment of the Curve

Smoothing a segment of the curve makes the curve flatter - reducing its peaks and troughs.

To smooth a segment of the curve:

1.   Select the keyframe at the start of the segment you want to smooth.
2.   Right-click and select Transform > Smooth... .

The Smooth dialog displays.

3.   Change the values within the dialog where appropriate:

• Step Size - how often to create a keyframe.

• Radius - how much to smooth the curve (higher values for smoother, lower values for closer to original).

• Filter - which algorithm to use, Triangle or Box.

4.   Click Apply to smooth the curve.

Note:  For the best results, smooth multiple segments at once by selecting a number of keyframes together.

Smoothing with the default settings:
Step Size 4, Radius 2, and Triangle
Filter (the original curve is ghosted
out).

Smoothing with Step Size 2 and
Radius 4.

Step Size 5 and Radius 2.

Step Size 4 and Radius 4.

Flipping the Curve Horizontally or Vertically

You can flip a curve either horizontally or vertically.

To flip a curve horizontally or vertically:

1.   Select a curve or a curve’s keyframe.
2.   Right-click and select Transform > Flip... .

The Flip dialog displays.

3.   Select whether you want to flip the curve horizontally or vertically or both:

• Horizontal (press Alt+H) - flips the curve horizontally.

• Vertical (press Alt+V) - flips the curve vertically.

• Center (press Alt+C) - the point at which to flip the curve (if a keyframe is selected it defaults to that keyframe position).

4.   Click Apply to flip the curve.

Scaling and Offsetting a Curve

Katana gives you the ability to scale or offset a curve.

To scale or offset a curve:

1.   Select the curve or a curve’s keyframe.
2.   Right-click and select Transform > Scale & Offset... .

The Scale & Offset dialog displays.

3.   Change the values within the dialog to get the desired effect:

• Scale (press Alt+S) - scales in either the x direction (changing timing) or y direction (changing the parameter value). Negative values reflect the curve about the values entered in the Pivot fields.

• Pivot (press Alt+P) - the point about which to scale (if a keyframe is selected it defaults to that keyframe position).

• Offset (press Alt+O) - moves the curve in the direction of the offset.

4.   Click Apply to effect the curve.