Steve

I have an application that uses JitterMatrix objects in JavaScript. Some of the matrices have a 2D array in a single plane with 1024 cells. I would like to rapidly and efficiently traverse these matrices retrieving the cell values, but not use the JitterMatrix.getcell() method within a for-loop. Is it possible to use a jit.iter or jit.spill object within JavaScript to quickly extract JitterMatrix array data? If so, I've been unable so far to find any JavaScript examples of how to use these 2 objects. The Jitter tutorial PDF mentions that they can be used, but I didn't see any JavaScript examples of their usage. I also searched in the Jitter JavaScript examples directories of the installation materials, but couldn't find anything there, either.

I have an application that uses JitterMatrix objects in JavaScript.  Some of the matrices have a 2D array in a single plane with 1024 cells.  I would like to rapidly and efficiently traverse these matrices retrieving the cell values, but not use the JitterMatrix.getcell() method within a for-loop.  Is it possible to use a jit.iter or jit.spill object within JavaScript to quickly extract JitterMatrix array data?  If so, I've been unable so far to find any JavaScript examples of how to use these 2 objects.  The Jitter tutorial PDF mentions that they can be used, but I didn't see any JavaScript examples of their usage.  I also searched in the Jitter JavaScript examples directories of the installation materials, but couldn't find anything there, either.

using-jit-iter-and-jit-spill-in-javascript

On Apr 19, 2007, at 10:50 AM, Steve Bursch wrote:

> I have an application that uses JitterMatrix objects in 

> JavaScript. Some of the matrices have a 2D array in a single plane 

> with 1024 cells. I would like to rapidly and efficiently traverse 

> these matrices retrieving the cell values, but not use the 

> JitterMatrix.getcell() method within a for-loop. Is it possible to 

> use a jit.iter or jit.spill object within JavaScript to quickly 

Sorry, these object won't work within JS. The JS equivalent would be 

exactly the getcell strategy you describe. However, if you're going 

to process the values you might want to try and use jit.expr even 

from within JS. See the tutorials and the jsglsurface-example.pat for 

some demonstrations of this jit.expr from JS technique.

>
> I have an application that uses JitterMatrix objects in  
> JavaScript.  Some of the matrices have a 2D array in a single plane  
> with 1024 cells.  I would like to rapidly and efficiently traverse  
> these matrices retrieving the cell values, but not use the  
> JitterMatrix.getcell() method within a for-loop.  Is it possible to  
> use a jit.iter or jit.spill object within JavaScript to quickly  
> extract JitterMatrix array data?

Sorry, these object won't work within JS. The JS equivalent would be  
exactly the getcell strategy you describe. However, if you're going  
to process the values you might want to try and use jit.expr even  
from within JS. See the tutorials and the jsglsurface-example.pat for  
some demonstrations of this jit.expr from JS technique.

Okay, thanks. I'll take a look at the jit.expr object.

Okay, thanks.  I'll take a look at the jit.expr object.

Hey folks, I was trying to instantiate a jit.iter in my javascript like so...

var jititer = new JitterObject("jit.iter");

jsjitterobject_Constructor: null class pointer jit_iter

From the post above it would appear that jit.iter is not supported in js.

Is this still the case? I want to iterate through a matrix, what is the best

From the post above it would appear that jit.iter is not supported in js.
Is this still the case? I want to iterate through a matrix, what is the best
method to do this in js now?

As JKC mentioned above, the best way to do this is still JitterMatrix.getcell().

Using jit.iter and jit.spill in JavaScript