CAAT.Behavior

CAAT.ContainerBehavior

A CAAT.Actor can have any number of CAAT.Behaviors enabled at once. There are no constraints about their type, duration and property application so the developer must take care of overlapping in time behavior instances.

There's also the possibility of grouping CAAT.Behaviors together as if they were just a single CAAT.Behavior. This can be accomplished by using a CAAT.BehaviorContainer. The features a container are:

1. A CAAT.ContainerBehavior can contain many other CAAT.Behavior instances, including other CAAT.ContainerBehaviors
2. It relates its contained children time from zero to its duration. This means that contained baheviors have zero time when the container starts.
3. Any contained behavior can not last beyond the container time duration. This means, the behavior will stop applying when the container duration is reached.

In the following example, we're going to set up a simple container behaviour. For the ease of the demo, the container has a lifecycle longer than its children behaviors. During the time that no behavior is being applied, nothing happens. Despite having a start time of 0 and 500, the children behaviors won't start applying until 5000 and 5500 milliseconds have elapsed respectively. This is because the children behaviors won't starts applying until the container does.

                var director = new CAAT.Director().initialize(
                        150, 150, document.getElementById('_c5'));
                var scene = director.createScene();

                var shape = new CAAT.ShapeActor().
                        setShape(CAAT.ShapeActor.prototype.SHAPE_RECTANGLE).
                        setLocation(50, 50).
                        setSize(50, 50).
                        setFillStyle('#ff0').
                        setStrokeStyle('#000')
                scene.addChild(shape);

                // set a Container for behaviors up.
                var cb = new CAAT.ContainerBehavior().
                        setCycle(true).
                    // take 3 seconds to perform contained behaviors. If any
                    // takes more than such time, it will be truncated.
                        setFrameTime(0, 3000);

                // setup an Scaling behavior. Min scale 1, Max scale 2
                // (twice in size)
                var sb = new CAAT.ScaleBehavior().
                        setPingPong().
                        setValues(1, 2, 1, 2, 50, 50).
                    // takes 2 seconds to scale. time measured from parent's
                    // zero time.
                        setFrameTime(0, 2000);

                // setup a Rotating behavior. 0-2PI, ie 360 degrees.
                var rb = new CAAT.RotateBehavior().
                        setValues(0, Math.PI, 50, 50).
                    // takes 1 second, starting half a second after parent's
                    // time.
                        setFrameTime(500, 1000);

                // add scale and rotation to the rectangle.
                cb.addBehavior(sb);
                cb.addBehavior(rb);

                // add path and conpound behavior of rotation and scale to
                // the rectanble shape.
                shape.addBehavior(cb);

                CAAT.loop(30);