Apple MA434Z/A User Manual - Page 823

The following example shows multiple instances of these same basic shapes employed to create a more complex effect-that of lava within a still image flowing forward. Boundary shape Source shape Target shape Connection line • Source Shapes: These are shapes you draw that conform to the subject of the source image you want to deform. They generally follow well-defined contour lines of the subject-examples might include the edge of a person's face, the contours of the eyes, eyebrows, nose, and mouth, or the outline of an arm or leg. Source shapes are light blue by default. • Target Shapes: These are shapes you draw that define the shape you want the deformed image to conform to. For example, if you want to warp the eyes of a cat to make them appear to bulge on cue, you would create animated target shapes defining the new shape of the eyes. Target shapes are dark blue by default. • Connection Lines: These are automatically created when you connect a source shape to a target shape, and indicate the correspondence of each point in a source shape to its destination on the target shape. It is by pairing source shapes with target shapes that Shake is able to create controlled deformations of an image. Although four connection lines are automatically created for each source/target shape pair, you can create additional ones to give you added control over the deformation. Connection lines are purple by default. • Boundary Shapes: The Warper and Morpher nodes can sometimes create unwanted deformations in areas surrounding the parts of the image you intend to manipulate. Boundary shapes are essentially shapes that are both source and target shapes, which is how they keep affected pixels from moving. You can use boundary shapes to minimize the effect of a warp on surrounding parts of an image, either by excluding whole regions of the source, or by "pinning down" specific areas that you don't want to be deformed. You can create as many boundary shapes as necessary, since it may take more than one to pin down an image completely. Boundary shapes are orange by default. Chapter 27 Warping and Morphing Images 823