All this talk of Mandelbrot sets prompted me to write a Julia Set morph using my OpenCL framework.  Here's how to try it out in a 4.1 image...

First, load the code:

	Installer squeak
		project: 'FFI';
		install: 'FFI-Pools';
		install: 'FFI-Kernel'.
	Installer ss
		project: 'OpenCL';
		install: 'OpenCL'.

Once the code has loaded, evaluate:
	OpenCLJuliaSetMorph new openInHand

You can move through the parameter-space by changing the "real" and "imaginary" components.  These are exposed to eToys.  I recommend hooking them up to a JoystickMorph.  I've attached a screen-shot of the script that I use.  The division by 40 is so that I can resize the JoystickMorph to be larger, and thereby move more precisely through the parameter space.

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This has been tested on 2 machines: a Win7 box with Nvidia 8800GTS and the latest drivers, and a MacBook Pro with 8600GT running OSX 10.6.  Your mileage may vary.  If it does, I'd like to hear about it.

BTW, the performance would be much higher if I displayed it using OpenGL instead of reading back into a Squeak Form and displaying using BitBlt.  My laptop GPU does the computation (including readback) for a 512x512 in about 5ms; it wouldn't be a problem to render at 200fps with OpenGL.

Cheers,
Josh

	

On Apr 26, 2010, at 2:02 PM, Lawson English wrote:

> Lawson English wrote:
>> Hannes Hirzel wrote:
>>> On 4/26/10, Lawson English <lenglish5 at cox.net> wrote:
>>> 
>>>> Randal L. Schwartz wrote:
>>>> I think that you meant to direct that at me...
>>>> 
>>>> /me looks sheepish.
>>>> 
>>>> 
>>>> Lawson
>>>> 
>>>>    
>>> 
>>> Please don't worry, just go ahead and work on a nice Mandelbrot morph.
>>> We need something like that for screenshots of Squeak.
>>> 
>>> Then Ian pointed out that we need a good screen shot and referred to
>>> an example on his blog (which actually shows that the current
>>> situation needs improvement ASAP)
>>> 
>>> http://mecenia.blogspot.com/2010/04/history-of-squeak-in-pictures.html
>>> 
>>> --Hannes
>>> 
>>>  
>> Levente has already done one. I'm trying to figure out how his works with an eye to make one that is etoy-enabled as a prelude to a "simple" [SIC] OGLMorph etoy thingie
>> 
>> http://squeaksource.com/MandelMorph2.html
>> 
>> 
>> Lawson
>> 
>> 
> ah, that was Bob Arnings, as repackaged by Torsten Bergmann.
> 
> :-)
> 
> Lawson
>