Chapter 25. Drawing with Vectors

In ActionsScript, primitive vectors, lines, and shapes are drawn via the Graphics class. However, the Graphics class is never instantiated directly; instead, each ActionScript class that supports programmatic vector drawing creates a Graphics instance automatically and provides access to it via the instance variable graphics. The display classes that support vector drawing are Sprite, MovieClip, and Shape.

Shape objects consume less memory than Sprite and MovieClip objects. Hence, to conserve memory, vector content should be drawn in Shape objects whenever the containment and interactive capabilities of the Sprite and MovieClip classes are not required.