Julia

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Julia


Variations based on polynomial Julia sets. For escape time fractals, the formula is z → z^n + c. For flames, the mapping is reversed and the “+ c” part is done by the affine transform, so these variations basically take the root of the input taken as a complex number, returning one of the results at random.

Based on complex numbers, the Julia transform is two dimensional by nature. Some 3D Julia variants have been written, but the 3D transformation is not related to the basic Julia operation.

Several other variations have incorporated the functionality of julian, including cpow, wavesn, and xtrb.


eJulia

Polynomial Julia sets in elliptic coordinates

Type: 2D
Author: Michael Faber
Date: 24 Jun 2012

Parameter Description
power The power for the polynomial; 2 for quadratic. Must be an integer. Negative values are allowed and return the reciprocal.

https://www.deviantart.com/michaelfaber/art/eSeries-306044892
http://platinus.deviantart.com/art/eJuliaTut-310065706


julia

Classic quadratic Julia set (obsolete; use julian with power=2).

Type: 2D
Author: Scott Draves
Date: 1 Feb 2004

The original Julia implementation, it has a bug: it swaps x and y. This was never fixed because doing so would break earlier flames. The workaround is to use julian with power set to 2.


julia3D

Classic polynomial Julia set with 3D extrusion.

Type: 3D
Author: Joel Faber

Parameter Description
power The power for the polynomial; 2 for quadratic. Must be an integer. Negative values are allowed and return the reciprocal.

julia3D_fl

“Fluid” version of julia3D; allows fractional values for power.

Type: 3D
Author: Fred E (morphapoph)
Date: 8 Sep 2010

Parameter Description
power The power for the polynomial; 2 for quadratic. May be fractional. Negative values are allowed and return the reciprocal.

https://www.deviantart.com/morphapoph/art/Apo-Anim-friendly-Plugins-178559281


julia3Dq

Julia set using a rational power with 3D extrusion. Also post_julia3Dq.

Type: 3D
Author: Peter Sdobnov (Zueuk)
Date: 2 Dec 2012

Parameter Description
power The numerator of the polynomial power. Must be an integer. Negative values are allowed and return the reciprocal.
divisor The denominator of the polynomial power.

https://www.deviantart.com/zueuk/art/juliaq-Apophysis-plugins-340813357


julia3Dz

Classic polynomial Julia set with 3D extrusion.

Type: 3D

Parameter Description
power The power for the polynomial; 2 for quadratic. Must be an integer. Negative values are allowed and return the reciprocal.

julia3Dz_fl

“Fluid” version of julia3Dz; allows fractional values for power

Type: 3D
Author: Fred E (morphapoph)
Date: 8 Sep 2010

Parameter Description
power The power for the polynomial; 2 for quadratic. May be fractional. Negative values are allowed and return the reciprocal.

https://www.deviantart.com/morphapoph/art/Apo-Anim-friendly-Plugins-178559281


juliac

Julia set using a complex power.

Type: 2D
Author: David Young (Sc0t0ma)
Date: 9 Sep 2008


Parameter Description
re The real part of the complex power. Negative values are allowed and return the reciprocal.
im The imaginary part of the complex power.
dist Distortion factor; increase to stretch the result and help fill in the hole normally left in the middle. Negative values do an inversion (aka spherical).

https://www.deviantart.com/sc0t0ma/art/Juliac-97512904


juliacomplex

Julia set using a complex power.

Type: 2D
Author: Luca G (dark-beam)
Date: 21 Nov 2011

Parameter Description
Re_p The real part of the complex power. Negative values are allowed and return the reciprocal.
Im_p The imaginary part of the complex power.
dist Distortion factor; increase to stretch the result and help fill in the hole normally left in the middle. Negative values do an inversion (aka spherical).
logadd An addition to the imaginary part; changes the shape of the “blades”

https://www.deviantart.com/dark-beam/art/Juliacomplex-apoplugin-270181347


julian

Classic polynomial Julia set

Type: 2D
Author: Scott Draves
Date: 15 Apr 2006


Often referenced as “juliaN” to emphasize it is julia with an “N” parameter, but the variation name is all lower case.

Parameter Description
power The power for the polynomial; 2 for quadratic. Must be an integer. Negative values are allowed and return the reciprocal.
dist Distortion factor; increase to stretch the result and help fill in the hole normally left in the middle. Negative values do an inversion (aka spherical).

https://www.jwfsanctuary.club/variation-information/julian/
http://fiery-fire.deviantart.com/journal/JULIANS-Fractal-Styles-216748198
http://jp-talma.deviantart.com/art/JP-Talmq-Apophysis-Tutorial-5-309109720
http://clairejones.deviantart.com/art/Julia-Uncovered-v-2-2-49167519
http://nemopaice.deviantart.com/art/Julian-Tutorial-By-nemopaice-36434472
https://www.deviantart.com/apophysis/art/Julian-Tutorial-Log-50944789
http://fiery-fire.deviantart.com/art/Apo-Spiked-3D-Julian-tuto-130523681
http://www.mfcreative.co.uk/julianringstutorial/
http://lindelokse.deviantart.com/art/LazyJulian-Apophysis-Tutorial-169056797
http://clairejones.deviantart.com/art/The-Rings2-and-Julian-Guide-62854687
http://cygx1.deviantart.com/art/Wire-Tube-Fractals-Tutorial-39470081
http://tyrantwave.deviantart.com/art/Apophysis-3D-Baseforms-Pack-113871861
http://tyrantwave.deviantart.com/art/Apophysis-Base-Forms-Pack-103671251
http://cosmic-cuttlefish.deviantart.com/art/Tutorial-Fractal-Stars-315456570
https://chronologicaldot.wordpress.com/2014/04/05/how-julia-transforms-work/
https://www.deviantart.com/meckie/art/Simple-3D-Julian-and-DOF-Tut-77364026


julian_fl

“Fluid” version of julian; allows fractional values for power

Type: 3D
Author: Fred E (morphapoph)
Date: 8 Sep 2010

Parameter Description
power The power for the polynomial; 2 for quadratic. May be fractional. Negative values are allowed and return the reciprocal.
dist Distortion factor; increase to stretch the result and help fill in the hole normally left in the middle. Negative values do an inversion (aka spherical).

https://www.deviantart.com/morphapoph/art/Apo-Anim-friendly-Plugins-178559281


julian2

Julian with an integrated affine transform. Also post_julian2.

Type: 2D
Author: Georg Kiehne (xyrus02)
Date: 11 Sep 2009


Parameter Description
power The power for the polynomial; 2 for quadratic. Must be an integer. Negative values are allowed and return the reciprocal.
dist Distortion factor; increase to stretch the result and help fill in the hole normally left in the middle. Negative values do an inversion (aka spherical).
a – f Affine coefficients: (x,y) → (ax+by+e, cx+dy+f)

https://xyrus02.deviantart.com/art/JuliaN2-Plugin-for-Apophysis-136717838 (Defunct)


julian2dc

Julian2 with direct color.

Type: 2D Direct Color
Author: Georg Kiehne (xyrus02)
Date: 16 Dec 2010


Parameter Description
power The power for the polynomial; 2 for quadratic. Must be an integer. Negative values are allowed and return the reciprocal.
dist Distortion factor; increase to stretch the result and help fill in the hole normally left in the middle. Negative values do an inversion (aka spherical).
col Controls direct color; 0 for radial, 1 for circles, others for spiral
a – f Affine coefficients: (x,y) → (ax+by+e, cx+dy+f)

http://xyrus-worx.org/Content/apophysis.directcolor.php (Defunct)
https://sourceforge.net/p/apo-plugins/code/HEAD/tree/personal/georgkiehne/julian2dc.c


julian3Dx

Julian2 with 3D wave effect

Type: 3D
Author: Georg Kiehne (xyrus02)
Date: 21 May 2014


Parameter Description
power The power for the polynomial; 2 for quadratic. Must be an integer. Negative values are allowed and return the reciprocal.
dist Distortion factor; increase to stretch the result and help fill in the hole normally left in the middle. Negative values do an inversion (aka spherical).
a – f Affine coefficients: (x,y) → (ax+by+e, cx+dy+f)

http://xyrus-02.deviantart.com/art/julian3Dx-Plugin-for-Apophysis-455502519 (Defunct)


juliaNab

Variant of julian with different parameters.

Type: 2D
Author: Ffey
Date: 2 Aug 2011


Parameter Description
n The power for the polynomial; same as julian parameter power
a Distortion factor; same as julian parameter dist
b Added to x and y; shifts result diagonally
separ Power for x; integers work best

http://ffey.deviantart.com/art/apoplugin-juliaNab-246311162 (Defunct)


juliaq

Julia set using a rational power. Also post_juliaq.

Type: 2D
Author: Peter Sdobnov (Zueuk)
Date: 2 Dec 2012


Parameter Description
power The numerator of the polynomial power. Must be an integer. Negative values are allowed and return the reciprocal.
divisor The denominator of the polynomial power.

https://www.deviantart.com/zueuk/art/juliaq-Apophysis-plugins-340813357


npolar

Mashup of julian and polar2.

Type: 2D
Author: Georg Kiehne (xyrus02)
Date: 8 Apr 2010


Parameter Description
parity When odd, parity is a scale factor for julian; no polar2 is done.
When even, npolar first does polar2, then julian, then polar2 with x and y reversed; the value of parity is not used.
n The power for the polynomial; same as julian parameter power

http://xyrus-02.deviantart.com/art/npolar-160017708 (defunct)


phoenix_julia

Julian with extra distortion parameters.

Type: 2D
Author: Chris Johns (TyrantWave)
Date: 2 May 2009


Parameter Description
power The power for the polynomial; 2 for quadratic. Non-integer values are allowed. Negative values are allowed and return the reciprocal.
dist Distortion factor; increase to stretch the result and help fill in the hole normally left in the middle. Negative values do an inversion (aka spherical).
x_distort Distortion factor for x.
y_distort Distortion factor for y.

https://www.deviantart.com/tyrantwave/art/PhoenixJulia-Apophysis-Plugin-121246658

Info


This information has been created by Rick Sidwell as a guide to the more popular variations used in fractal flames. Not all of the variations are included with JWildfire, but a great many are, so it is worthwhile learning about them here.

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