reb Class REB_Julia

```Object
common:Generic
common:Formula
common:DivergentFormula
reb:REB_Julia
```

`class DivergentFormula:REB_Julia`

Mandelbrot Julia with Fractint style bailout options.

The default drawing method is multi-pass linear and periodicity checking is off.

Ultra Fractal Source
``` class REB_Julia(common.ulb:DivergentFormula) {
; Mandelbrot Julia with Fractint style bailout options. <br>
; <p>
; The default drawing method is multi-pass linear and periodicity checking
; is off.
public:
import "common.ulb"

; constructor
func REB_Julia(Generic pparent)
DivergentFormula.DivergentFormula(pparent)
endfunc

; initialize the formula
complex func Init(complex pz)
divergentFormula.Init(pz)
return pz
endfunc

; call for each iterated point
complex func Iterate(complex pz)
DivergentFormula.Iterate(pz)
return pz^@p_power + @seed
endfunc

; This overrides the divergent formula bailout.
bool func IsBailedOut(complex pz)
bool bail = false
if @test == 0
bail = (|pz| > @p_bailout)
elseif @test == 1
bail = (sqr(real(pz)) > @p_bailout)
elseif @test == 2
bail = (sqr(imag(pz)) > @p_bailout)
elseif @test == 3
bail = (sqr(real(pz)) > @p_bailout || sqr(imag(pz)) > @p_bailout)
elseif @test == 4
bail = (sqr(real(pz)) > @p_bailout && sqr(imag(pz)) > @p_bailout)
elseif @test == 5
bail = (sqr(abs(real(pz)) + abs(imag(pz))) > @p_bailout)
elseif @test == 6
bail = (sqr(real(pz) + imag(pz)) > @p_bailout)
endif
return bail
endfunc

default:
title = "Julia"
int param v_julia
caption = "Version (Julia)"
default = 101
hint = "This version parameter is used to detect when a change has been made to the formula that is incompatible with the previous version. When that happens, this field will reflect the old version number to alert you to the fact that an alternate rendering is being used."
visible = @v_julia < 101
endparam
text = "This a Julia that includes the Fractint bailout options."
param test
caption = "Bailout Test"
default = 0
enum = "mod" "real" "imag" "or" "and" "manh" "manr"
hint = "mod is the standard bailout. The remaining bailout methods are \
from Fractint."
endparam
float param p_bailout ; Overrides p_bailout from DivergentFormula
caption = "Bailout value"
default = 10000.0
min = 1.0
hint = "Use a value of 4 if the bailout test is other than mod."
endparam
complex param seed
caption = "Julia seed"
default = (-0.75, 0.25)
hint = "Use this parameter to create many different Julia sets. A good \
way to set this parameter is with the Eyedropper or Explore features."
endparam
complex param p_power ; Overrides p_power from Formula
caption = "Power"
default = (2,0)
endparam
}
```

Constructor Summary
`REB_Julia()`

`REB_Julia(Generic pparent)`
constructor

Method Summary
` complex` `Init(complex pz)`
initialize the formula
` boolean` `IsBailedOut(complex pz)`
This overrides the divergent formula bailout.
` complex` `Iterate(complex pz)`
call for each iterated point

Methods inherited from class common:DivergentFormula
`GetUpperBailout`

Methods inherited from class common:Formula
`GetLowerBailout, GetPrimaryExponent`

Methods inherited from class common:Generic
`GetParent`

Methods inherited from class Object

Constructor Detail

REB_Julia

`public REB_Julia(Generic pparent)`
constructor

REB_Julia

`public REB_Julia()`
Method Detail

Init

`public complex Init(complex pz)`
initialize the formula

Overrides:
`Init` in class `DivergentFormula`
Parameters:
`pz` - seed value for the sequence; for a normal fractal formula, this will be #pixel
Returns:
first value in the sequence; this corresponds to #z in a fractal formula

Iterate

`public complex Iterate(complex pz)`
call for each iterated point

Overrides:
`Iterate` in class `Formula`
Parameters:
`pz` - previous value in the sequence; corresponds to #z in a fractal formula. Note that you should always use this value for computing the next iteration, rather than a saved value, as the calling code may modify the returned value before passing it back to the next Iterate() call.
Returns:
the next value in the sequence

IsBailedOut

`public boolean IsBailedOut(complex pz)`
This overrides the divergent formula bailout.

Overrides:
`IsBailedOut` in class `DivergentFormula`
Parameters:
`pz` - last sequence value to test; this should be the value returned from the previous Iterate() call. Note that it is acceptable to ignore pz and use m_BailedOut, but any code calling IsBailedOut() should pass in the correct pz for Formula classes which do not use m_BailedOut.
Returns:
true if the sequence has bailed out (i.e. should be terminated)