reb
Class REB_TrapShapeREBAstroid

Object
  common:Generic
      common:TrapShape
          reb:REB_TrapShapeREBAstroid

class 
TrapShape:REB_TrapShapeREBAstroid

This shape uses the astroid function.

This variant of the astoid function is different from that used by Damien Jones. It has signed and absolute value version of the distance. The function also has a complex conjugate variant. The transformed value is the complex return value of the function.

Ultra Fractal Source

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 class REB_TrapShapeREBAstroid(common.ulb:TrapShape) {
  ; This shape uses the astroid function.<br>
  ; <p>
  ; This variant of the astoid function is different from that used by Damien
  ; Jones. It has signed and absolute value version of the distance. The function
  ; also has a complex conjugate variant. The transformed value is the complex
  ; return value of the function.
  public:
    import "common.ulb"
 
 ; Constructor
    func REB_TrapShapeREBAstroid(Generic pparent)
      TrapShape.TrapShape(pparent)
    endfunc
    
   ; Call this for each iteration being trapped.
    float func Iterate(complex pz)
     TrapShape.Iterate(pz)
      float theta = 0
      float d =  0
      complex as = 0
      complex af1 = 0
      complex af2 = 0
      theta = atan2(pz)
      int sgn = 1
     if @sgn
       sgn = -1
     endif
      af1 = @afn1(theta)^real(@pwr)
      af2 = @afn2(theta)^imag(@pwr)
      as = @ar*(af1+sgn*flip(af2))
      m_LastZ = as
      if @absval
        d = abs(cabs(pz) - cabs(as))
      else
        d = cabs(pz - (as))
      endif
      return d
    endfunc
    
  default:
    title = "Astroid REB"
   int param v_trapshapeastroidreb
     caption = "Version (Trap Shape Astroid REB)"
     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_trapshapeastroidreb < 101
   endparam
    
    float param ar
      caption = "Radius"
      default = 0.2
      hint = "Affects spread and scale of trap"
    endparam
    complex param pwr
      caption = "Power"
      default = (3,3)
      hint = "Affects shape and scale of trap."
    endparam
    func afn1
      caption = "Function #1"
      default = cos()
    endfunc
    func afn2
      caption = "Function #2"
      default = sin()
    endfunc
    bool param sgn
      caption = "Conjugate transform"
      default = false
    endparam
    param absval
      caption = "Absolute Value"
      default = false
    endparam
  }
 

Constructor Summary

REB_TrapShapeREBAstroid()

REB_TrapShapeREBAstroid(Generic pparent)
Constructor

Method Summary

float

Iterate(complex pz) Call this for each iteration being trapped.

Methods inherited from class common:TrapShape

GetColorChannel, GetTextureValue, GetTransformedPoint, Init, IterateSilent, SetThreshold

Methods inherited from class common:Generic

GetParent

Methods inherited from class Object

Constructor Detail

REB_TrapShapeREBAstroid

public REB_TrapShapeREBAstroid(Generic pparent)

Constructor

REB_TrapShapeREBAstroid

public REB_TrapShapeREBAstroid()

Method Detail

Iterate

public float Iterate(complex pz)

Call this for each iteration being trapped.

Overrides:

Iterate in class TrapShape