Image Calculation Parameters
Selects single-pass, dual-pass, triple-pass, solid-Guessing mode, solid-
Guessing stop after pass n, Boundary Tracing, or the Tesseral algorithm.
Sets a color to be used for block fill by Boundary Tracing and Tesseral
Most fractal types have both a fast integer math and a floating point
version. The faster, but possibly less accurate, integer version is the
default. The default is to use integer math, but in this age of pentium
(amd later) CPUS we now recommend your making float=yes the default by
adding this line to your SSTOOLS.INI file. Also see
"Limitations of Integer Math (And How We Cope)"
- Forces symmetry to None, Xaxis, Yaxis, XYaxis, Origin, or Pi symmetry.
Useful as a speedup for symmetrical fractals. This is not a kaleidoscope
feature for imposing symmetry where it doesn't exist. Use only when the
fractal actual exhibits the symmetry, or else results may not be
Forces nnn digits if arbitrary precision used. You can use this if
fractint's precision detection changes to arbitrary precision too late
and regular double precision is used with poor results.
This commands controls the logic that automatically selects one of
integer/float/arbitrary precision based on precision requirements of the
current zoom depth. The first number controls the integer/float
transition, and the second number controls the float/arbitrary precision
transition. The default value of .05 for both means that the ratio
between the exact and calculated width and height is between .95 and
1.05. A larger value than .05 (say .10) makes the test looser so that
the lower precision math is used longer. A value <= 0 means the test is
always failed and the higher precision math type is used. A value >= 1
means that the test is always passed and the lower precision math type
This sets the minimum number of stack bytes required for passes=s in
order to do another SOI recursion. If you get bad results, try setting
this to a value above the default value of 1100. If the value is too
large, the image will be OK but generation will be slower.
Reset the iteration maximum (the number of iterations at which the
program gives up and says "OK, this point seems to be part of the set in
question and should be colored [insidecolor]") from the default 150.
Values range from 2 to 2,147,483,647 (super-high iteration limits like
200000000 are useful when using logarithmic palettes). See
The Mandelbrot Set for a description of the iteration method of
"maxiter=" can also be used to adjust the number of orbits plotted for
3D "attractor" fractal types such as lorenz3d and kamtorus.
Begin with these coordinates as the range of x and y coordinates, rather
than the default values of (for type=mandel) -2.0/2.0/-1.5/1.5. When you
specify four values (the usual case), this defines a rectangle: x-
coordinates are mapped to the screen, left to right, from xmin to xmax,
y-coordinates are mapped to the screen, bottom to top, from ymin to
ymax. Six parameters can be used to describe any rotated or stretched
parallelogram: (xmin,ymax) are the coordinates used for the top-left
corner of the screen, (xmax,ymin) for the bottom-right corner, and
(x3rd,y3rd) for the bottom-left. Entering just "CORNERS=" tells
Fractint to use this form (the default mode) rather than CENTER-MAG (see
below) when saving parameters with the [B] command.
This is an alternative way to enter corners as a center point and a
magnification that is popular with some fractal programs and
publications. Entering just "CENTER-MAG=" tells Fractint to use this
form rather than CORNERS (see above) when saving parameters with the
command. The [TAB] status display shows the "corners" in both forms.
When you specify three values (the usual case), this defines a
rectangle: (Xctr, Yctr) specifies the coordinates of the center of the
image while Mag indicates the amount of magnification to use. Six
parameters can be used to describe any rotated or stretched
parallelogram: Xmagfactor tells how many times bigger the x-
magnification is than the y-magnification, Rotation indicates how many
degrees the image has been turned, and Skew tells how many degrees the
image is leaning over. Positive angles will rotate and skew the image
Over-rides the default bailout criterion for escape-time fractals. Can
also be set from the parameters screen after selecting a fractal type.
See description of bailout in
The Mandelbrot Set .
Bailout Test used to determine when the fractal
calculation has exceeded the bailout value. The default is mod and not
all fractal types can utilize the additional tests.
Causes Fractint to reset all calculation related parameters to their
default values. Non-calculation parameters such as "printer=", "sound=",
and "savename=" are not affected. RESET should be specified at the start
of each parameter file entry (used with the [@] command) which defines
an image, so that the entry need not describe every possible parameter -
when invoked, all parameters not specifically set by the entry will have
predictable values (the defaults).
Allows control over the value used to begin each Mandelbrot-type orbit.
"initorbit=pixel" is the default for most types; this command
initializes the orbit to the complex number corresponding to the screen
pixel. The command "initorbit=nnn/nnn" uses the entered value as the
initializer. See the discussion of the
Mandellambda Sets for more on this topic.
Controls periodicity checking
(see Periodicity Logic ). "no"
turns it off, "show" lets you see which pixels were painted as "inside"
due to being caught by periodicity. Specifying a number causes a more
conservative periodicity test (each increase of 1 divides test tolerance
by 2). Entering a negative number lets you turn on "show" with that
number. Type lambdafn function=exp needs periodicity turned off to be
accurate -- there may be other cases.
The initial random-number "seed" for plasma clouds is taken from your
PC's internal clock-timer. This argument forces a value (which you can
see in the [Tab] display), and allows you to reproduce plasma clouds. A
detailed discussion of why a TRULY random number may be impossible to
define, let alone generate, will have to wait for "FRACTINT: The 3-MB
Colors the current dot being calculated color [nn] or an automatically
calculated color taken from the current palette. The second parameter is
the size of the traveling pointer in units of pixels of 1/1024th of
The travelling pointer strobes with fast fractals because of interaction
with the monitor's vertical refresh. The orbitdelay parameter can be
used to introduce a per-pixel delay when showdot is turned on. Try
orbitdelay=1000 with showdot=b/20 to get a feel for how the showdot
When zooming in or out, the aspect ratio (the width to height ratio) can
change slightly due to rounding and the noncontinuous nature of pixels.
If the aspect changes by a factor less than [nn], then the aspect is
set to it's normal value, making the center-mag Xmagfactor parameter equal
to 1. (see CENTER-MAG above.) The default is 0.01. A larger value
adjusts more often. A value of 0 does no adjustment at all.
Doodad parameters and
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