Geometrical Morphing

The tweening applied to our face could work with any vector object as well. For instance, turning a square into a lozenge does not require much more effort. Let's create a new animation to illustrate this:

1. Draw a simple filled square at the first keyframe.
   
   
2. Create a new keyframe at position 10 as we did before, and draw a lozenge.
   
   
You can use the Line tool for this and apply a fill colour with the Paint Bucket.



Figure 4: A lozenge quickly drawn


3. Creating shape tweening with two images.
   
   

Look at the results. The created animation gives the sensation of a rotating square. Unfortunately, this is not the desired effect. What we want is for each corner of the square to be turned into the sides of the lozenge, and vice versa.