The Java Applet Art Gallery

Animated abstract art for the Java-enabled

These images are not from traditional GIF or JPEG image files. They are being produced right before your eyes by little computer programs ("applets") written in the "Java" computer language. If you don't have Java set up on your machine you won't see them.

Click inside any image to stop or restart its action.

Notes on the Random Rectangles applet

Notes on the do-nothing applet

Notes on the Spreading Waves applet

Objects in the picture below are links

If you have Java enabled, you should see a picture here. It should act somewhat like a Usemap, except that it's easier to set up odd shapes to click on.

NOTES on this applet

Notes on the Random Rectangles applet

This was my first Java applet, and is quite simple. It just draws rectangles of random size and random color on top of whatever has gone before. That's IT.

Notes on the do-nothing applet

The thin image that looks like a thick horizontal rule and appears to do nothing but change color if you click on it actually serves a purpose. Some versions of some browsers have a bug that makes animation look jerky unless an applet is constantly redrawing itself. But making the others redraw themselves all the time can cause other problems, such as flickering. Since this one never changes, you don't notice when it redraws. So by having it constantly redrawing it keeps the browser informed that the others may need updating. Clicking on it stops and starts it. Green = running, Red = stopped. Depending on your browser it may or may not affect how the other applets operate.

Notes on the Spreading Waves applet

I was reading an article in an engineering journal about the design of cardiac defibrillators, and it described how cells in the heart wait in a resting state until some trigger stimulus causes them to contract, then can't be triggered again until after a recovery period. When a cell is triggered, it triggers any of its neighbors that are ready to be triggered, resulting in a wave of contraction moving through the tissue. The article then went on to describe how the waves behave under normal and abnormal conditions, and how electric fields from a defibrillator affect them.

I based this applet very loosely on that concept, perhaps loosely enough to call it "artistic inspiration" rather than "modeling the phenomenon". I used three distinct populations of cells: Red, Green, and Blue. They occupy the same space without interacting. Instead of having a single pacemaker I apply stimuli to random cells every so often. When a cell is triggered it becomes visible, and then slowly fades. After a cell's color has faded the cell takes several cycles to recover before it can again be triggered. The three resulting sets of colored waves overlap to blend into other colors.

About the Author

(40k GIF)

This page was created by Tom Digby and is copyrighted with a fairly liberal "fair use" policy.

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