Hi folks,

I've been off UF for some time, and trying now to update the formula DB for UF6. I am getting a message after the download is complete that a txt file cannot be created, access denied, and when I dismiss that, the install process hangs. I have a screenshot of the message, which I attach. Any ideas? Never had anything like this happen before.

Also, in trying to update the v5 data

Does anyone know how to write a formula for this fractal?
I've seen it called a teardrop or mandeldrop fractal, but after much experimentation have been unable to recreate it.

There may already be a formula for this in the database, but I couldn't find one.

Is there an emacs mode file for editing UF formulas?

I attempted to implement a perturbation method for this fractal:

w <-- w/z
z <-- z^2+w^2+c

but it does not give the right result. Suggestions anyone?

MandelFoamPT {
init:
#z = sqrt(-1/2)
loop:
#z = #z^2 + #pixel
bailout:
|#z| <= @bailout
perturbinit:
#dz = 0
w = sqrt(1/2)
perturbloop:
wo = w
w = w/#z;
#dz = 2*#z*#dz + sqr(#dz) + wo^2 + #dpixel
default

Seems like the outer iteration variable is reset in the inner loop.
Example below.

class Bug {
static func printCoeff(int K,int M)
$define DEBUG
int i=0
int j=0

while(i<=K)
;print("i1=",i)
while(j<=M)
if i>0
; never get here, i is reset to 0?
print(i, " ", j)
endif
;print("i2=",i)

For given width, height, magn, how can I obtain the #pixel spacing? For a square image it seems 4/#magn/#width, but for other aspect ratios I can't figure it out.

Is there any way to make formula variables visible in the coloring formula loop? I'm trying some fractals with more than one variable z and need to use both in coloring.

I have an ugly workaround basically doing all the coloring in the fractal formula and stuffing the color index in #z at the end and then just setting #index = #z in the coloring formula.

Is it possible to declare a Global Variable such that its value persists across animation frames? This is necessary when one frame of the animation is dependent on some computational state information of the previous frame, behond what is stored in the Parameters.

For example, the fractals produced in diffusion models, where the pictorial fractal is a representation of a computational state w

@ Frederik

My formula file om.ufm is getting quite large, 2017 kb, with a lot of formulas. I have just received a request from someone who uses the formulas for a new file. Is it possible to have an om2.ufm file, please?

Hi all,

In some coloring algorithm there is a loop, (for instance in the Gaussian integer algorithm)

loop:
iter=iter+1
temp2=#z
......
final:

I want to know when this part is executed.
Is it added at the loop of the formula, for instance Mandelbrot formula?

Thank you

Hi all,

In the slope (Mandelbrot) formula a «height» based on distance estimator is calculated.
Can you tell the origin of these formulas, or an explanation?
Thanks

Hello
I am a beginner with the writing of formulas.

I have two questions:

1.
In the triangle inequality average coloring program we find:

IF (!first)
az2 = cabs(#z - #pixel)
lowbound = abs(az2 - ac)
sum = sum + ((cabs(#z) - lowbound) / (az2+ac - lowbound))
ELSE
first = false
ENDIF

I suppose that !first means the value of first but I a

There is a script in apo that I really wish I could play with in UF (my apo got corrupted and can't find it now as it was removed from where I found it and cannot now find another version that will work on my mac) called Faerie Blossom originally written for Apophysis by Bunnie Clark and Bart Doetsch, am I wishful thinking here or is it possible?

Can someone show me how I can make a dragon curve in this program? I'm new and I can't figure out how you can do something like this. If it is not possible to do this, can you show me another program that may help?

It's been so long that I've done any UF programming that I've forgotten how to get the window boundary values in fractal coordinates, assuming that there's no skew. I remember that #ctr gives the center. And there's some stuff about the width to height ratio being over or under 4:3.

Greetings. Back in the days of the old mailing list, there were so many discussions about what it took to make a fractal image one's own, but not nearly so much discussion relating to modifications of fractal formulas in UFM files. Most of us have modified z = z^2 + c many times without a thought, but what about other fractal formulas? Many of us have been asked for permission to modify our fo

I am an avid fan of XaoS and it has a very unique fractal called Catseye. There isn't much documentation on it, I don't know where it came from, and I have no idea what the actual formula looks like. Perhaps it can be uncovered somewhere on GitHub? It has some incredible potential when varying the bailout value and the different fractal planes. Here are some designs I worked up mostly in Juli

PixelCoordinate, a UtilityTransform, takes as argument a fractal coordinate z and returns the corresponding pixel coordinate.

Is there a similar transform that takes as argument a pixel coordinate and returns the corresponding fractal coordinate?

If not, I could write one.

I'd like to do the following in the default section:

int param p1
; stuff
endparam
int param p2
min = 1
max = @p1
endparam
but UF6 won't let me use @p1 here. Is there any way around this other than checking in the Init section?

Is anyone else unable to access the public formulas, either browse or recent changes or logging in as an author?

I am able to update my formulas successfully in UF, but cannot upload some new formulas I have written.

I get this message:

CGIWrap Error: Request Error

followed by (for browsing collection):

There is a problem with the request. Please contact the owner of the site