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Support classes
The following are generally useful classes that might be used in more than one scenario. They were ussually developed in the context of a specific scenario, but should be useful in other contexts, possibly with a little modification. By publishing the classes here, implicit permission is granted for you to use these classes in your projects, modify and distribute them. You should not, however, remove the original author name. If you modify a class, add your own name as an additional author (with explanation of the modifications made, if you want), but acknowledge original authors.
You may also want to look at the support class collection on the gallery. It has a number of support classes within scenarios submitted by the community, and also provides a means of uploading any of your own support classes you want to share.
| Class | Decription | Sample uses |
| AnimatedActor | A class that allows an actor to have an animated image. | Animation |
| Counter | A counter that displays a number value with a text prefix. Can be used for points scores, or similar. | |
| Explosion | An explosion. This is an actor class. Also requires explosion.png (put into images) and Explosion.wav (put into sounds). | Lunar-lander Asteroids |
| FPS | Displays the approximate frames per second of a scenario. Useful for measuring performance changes. | |
| GifActor | A class that allows an actor to have an animated image from a GIF file. | Demo |
| MidiPlayer | Plays MIDI files and generates notes through MIDI. | Demo
MIDI Piano |
A class that adds relative 'move' and 'turn' methods to actors. It is a subclass of Actor (to be used as superclasses for your own actors). |
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| Plotter | A class that implements a graph that plots the population of two actor classes. | foxes-and-rabbits |
| Rotator | A class that easily lets you rotate around a given point in the world. | Demo Analogue Clock |
| Slider | A graphical slider that can be used to select a range of values. | |
| SmoothMover | A class that adds smoother movement for fast-moving, high-resolution worlds (such as typical arcade games) This class replaces the int-based location with double-based location fields. It is a subclass of Actor, and can be used as superclass for specific actors. Requires class Vector. | Asteroids |
| Vector | A class representing a two-dimensional vector. This can be used to represent and modify movement of actors. | Asteroids |
| Wanderer | A class that allows actors to wander in and out of the world, whilst still keeping track of their co-ordinates. |
maintained by Poul Henriksen and Michael Kölling. |
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