Dissolve and Interpolation Curves

Source interpolation uses two predefined animation curves—dissolve and interpolation—to calculate the percentage change from the front source mesh to the back source mesh over the length of the clip. These values are set in the Dissolve and Interpolate fields:

• The Dissolve field defines the percentage change in the colour of the pixels at the current frame.
• The Interpolate field defines the percentage change in the position of the pixels at the current frame.

The default values in these fields are 0% at the first frame and 100% at the last frame. Using the default values results in a smooth dissolve from the pixels in the front image to those in the back image, as well as a smooth transition from the shape of the front image to that of the back image. You can change the rate of the morph by changing the interpolation and dissolve values.

To use source interpolation:

1. Click Morph to display the Morph menu.
2. Under Mapped To, select Source Interp to use source interpolation for the Front Destination mesh and Back Destination mesh.

   
   

   (a) Source interpolation option for the front destination mesh  (b) Source interpolation option for the back destination mesh  

3. Enable Curves to activate the interpolation and dissolve curves.

   
   

4. In the View box, select Result to view the result, and play the clip.

To change the rate of the morph:

1. In the Warper menu, click Animation to display the Channel Editor.
2. Select the dissolve or the interpolate channel.
3. Modify the curve.