I posted it to this list, like 3 months ago i guess...
Basically, you can draw a mandelbrot like this:
<snip>
fcx = 0 ---- center x
fcy = 0 ----- center y
fscale = 0.02 ---- scale
fLimit = 4 ----- level of precision
colorLimit = 255 --- colordepth(integer)
resHor = 320
resVert = 200
repeat with fx = -(resHor/2) to (resHor/2)
repeat with fy = -(resVert/2) to (resVert/2)
fax = fcx+fx*fscale
fay = fcy+fy*fscale
fa1 = fax
fb1 = fay
lp = 0---colorcounter
repeat while (lp <=colorLimit) and ((fa1*fa1)+(fb1*fb1)<=fLimit) --
iterate
lp = lp+1
fa2=fa1*fa1-fb1*fb1+fax
fb2=2*fa1*fb1+fay
fa1=fa2
fb1=fb2
end repeat
if lp > colorLimit then lp = 0
imageReference.setPixel(fx+(resHor/2),fy+(resVert/2),lp)
end repeat
end repeat
<snip>
Have fun with it...
If you can find a more efficient way to do it, let me know....
It's useless to do the obvious optimizations, because the lack of speed lies
in the repeat loops...
Chris.
----- Original Message -----
From: "Frank Di Luzio" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, September 07, 2001 10:11 AM
Subject: <lingo-l> Lingo Speed was [Keyword search of text in flash in
Director]
> and lingo isn't all that fast
> either - the other day i wrote this fractal thingie to test the speed of
> lingo vs c++ - the c version was like quadraticly faster - it did a
640x480
> 32bit render about 500 times faster than the lingo version....
Yeh, tell me about it. I've been working on a transition code that uses
bitmaps or Flash members for the transition. It's ashame that it takes so
long to execute. No matter how hard I try, I'll never get the performance
that a transition xtra offers. But its still cool to be able to make any
transition you want and I do get reasonable speed on a 300 mhz machine.
on a side note, I would like to see how a fractal equation works using
lingo. I've seen the "mandelbaum" equation (don't know the english word,
but its that classic example of the first fractal images) but I wouldn't
know how to to use it, and how to feed the results from equation back into
it. If you had an example I could look at maybe it will help me understand
it.
Frank
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