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by D Vodislav - Cited by 3 - Related articles
scripts. Resulting scenes are used as dynamic user interface components, integrated in .... Actor evolution concerns object motion and attribute changes. Motion ...

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Note added at 29 minutos (2013-04-01 15:42:20 GMT)
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Decor elements are motionless objects involved in the motion of some actors in the scene.
A decor element may have one or more actors attached to it during scene evolution. Figure 3 presents a scene for a sort program, where each ball is an actor representing a sorted value and vertical sticks are decor elements with attached actors. Actor-decor attachment is useful when it is simpler to address an actor through the decor element (e.g. in the sort program we want (decor) positions 3 and 4 to interchange values). Decor elements may be used as start/end points for actor motion; in such a case they must define positioning rules for the attached actors (in Figure 3, actors are positioned at the bottom of the decor elements).
As in the example in Figure 3, in many cases we have similar actors behaving in a similar way. In such a situation it is more profitable to describe the **evolution of one actor** only and to treat the others by similarity.

3.2 Motion elements
Input stimuli and **actor evolution**
***Actors have independent evolutions**, under the influence of three types of basic input stimuli:
time, values (produced by the external application) and user input (produced by mouse or keyboard events). Time signals are periodic with a given frequency; the others are sudden events.
**Actor evolution** concerns object motion and attribute changes. Motion is a combination of translation and rotation.