Meet the Kinect: Programming and Scripting Human-Computer Interaction by Sean Kean Jonathan C. Hall Phoenix Perry

Author:Sean Kean, Jonathan C. Hall, Phoenix Perry [Sean Kean, Jonathan C. Hall, Phoenix Perry]
Language: eng
Format: epub
Tags: Computers, Computer Vision & Pattern Recognition
ISBN: 9781430238881
Publisher: Apress
Published: 2011-12-30T05:00:00+00:00

Figure 6-4. Modified stand alone Flash example running in OmekBeckonFlash.exe

The greatest difficulty working with Flash and Beckon is the loss of a console window. You could use brute force and drop a text box onto the screen and send messages to it, but a cleaner way to get debug text on screen is to create a function that draws debug text via Actionscript.

Notice how the example now reflects the above changes. I triggered a few of the functions that are in the file by performing gestures or causing alerts to display on screen. Try doing the same by moving to close to the Kinect or walking out of view. You will now see all of the new lines being written to screen. They were there before, but because the textbox was so small, you didn’t see the debug text being displayed. Now you can easily in the debugString_txt box’s text.

I perform the right click gesture in Figure 6-4. Performing this gesture is just a matter of tapping forward with a quick double-tap like motion as your right hand is slightly raised in front of you to about chest height. It’s the same motion you’d make to tap someone on the shoulder who was sitting directly in front of you. The debug text shows this gesture was seen by the camera and registered. Next, I intentionally got to close to the camera to trigger the “Alert_TooClose” alert.

The reason the debugString_txt box is important is that, by running the swf in a 3rd party application, you lose access to the normal console window in Flash. Creating messages that appear on-screen for debugging purposes is a fundamental change that you are going to have to adapt to when working with Beckon. A smart way to handle this is to create a debug mode in your application that you can trigger with a keystroke to turn onscreen alerts on or off.

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