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# 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.