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Index › Programming Questions & Help › OpenGL and 3D Libraries › opengl variable screen size
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opengl variable screen size (Read 775 times)
andy_woods
opengl variable screen size
May 8th, 2006, 6:52pm  
Hi,

Just wondering if anyone knows of a way to feed an opengl web applet information from the webpage that contains it (do-able using param), and for the applet to use that information to specify its size?

I came acropper on this before (see http://processing.org/discourse/yabb_beta/YaBB.cgi?board=Contribution_3DOpenGL;action=display;num=1143200497). Is there anyway to get size to use variables?  I've been playing with scary JAVA commands (which I have little experience with) and I've had no joy so far.

Thanks for any suggestions, Andy.
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fjen
Re: opengl variable screen size
Reply #1 - May 8th, 2006, 8:37pm  
see: param()

this let's you read the values from the params as specified in the applet tag. the reference page seems to have a problem with not encoded < and > so here's what it should read there:
Code:

// Read the value "51" from the following text embedded in an HTML page:
// <applet code="param_" archive="param_.jar" width=100 height=100>
// <param name="back" VALUE="51">  
// </applet>

String bs= param("back");
int bi = Integer.parseInt(bs);
background(bi);


but:
i don't see why you would want to set the size() via additional params, since it's anyway already set in the tag. just change the applet-tag to change size and use width and height to read it.

?

best,
F
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cello
Re: opengl variable screen size
Reply #2 - May 9th, 2006, 6:13pm  
You can get the actual width and height of the applet by using java.applet.Applet's getWidth() and getHeight().  You can even dynamically keep track of when the size changes (using ComponentListener, I believe, don't remember exactly), and call size() accordingly.  That's useful if you have your applet size set to a variable unit (like 100%).

Marcello
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fry
Re: opengl variable screen size
Reply #3 - May 9th, 2006, 6:22pm  
all that getWidth() and componentlistener stuff is handled internally by PApplet. if you can convince your browser to resize the applet using javascript, then the PApplet will resize itself appropriately.

the result across different browsers is extremely inconsistent, however, so it's not really recommended as something to count on working properly on others' machines.
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cello
Re: opengl variable screen size
Reply #4 - May 9th, 2006, 8:31pm  
It is?  ::goes off to try it out::

awesome!

Now you just need a way to make processing have a resizable window when you hit 'run' to make testing easier...

Anyway, if anyone wants to try:
http://www.cs.unm.edu/~cello/processing/sizetest/

It doesn't use javascript to size or anything.

Marcello
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