reb
Class REB_TrapShapeHopalong

Object
  common:Generic
      common:TrapShape
          reb:REB_TrapShapeHopalong

class 
TrapShape:REB_TrapShapeHopalong

This shape uses the Hopalong strange attractor. It can also be used as a texture.

Ultra Fractal Source

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 class REB_TrapShapeHopalong(common.ulb:TrapShape) {
  ; This shape uses the Hopalong strange attractor. It can also be used as a texture. <br>
  public:
    import "common.ulb"
 
    ; Constructor
   func REB_TrapShapeHopalong(Generic pparent)
      TrapShape.TrapShape(pparent)
    endfunc
    
   ; Call this for each iteration being trapped.
    float func Iterate(complex pz)
     TrapShape.Iterate(pz)
     int sgn = 1
     if @sgn
       sgn = -1
     endif
      float x = real(pz)*@s
      float y = imag(pz)*@s
      float pxx = 0
      int att_iter = 0
 
      while att_iter < @max_att_iterations
        pxx = x
        if x != 0
          x = y - x/abs(x)*sqrt(abs(@h2*x-@h3))
        else
          x = y - sqrt(abs(@h2*x-3))
        endif
        y = @h1 - pxx
        att_iter = att_iter + 1
      endwhile
      m_LastZ = (x + sgn*flip(y))
      float d = @distscale*|pz-(x + sgn*flip(y))|
      return d
    endfunc
    
  default:
    title = "Hopalong"
   int param v_trapshapehopalong
     caption = "Version (Trap Shape Hopalong)"
     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_trapshapehopalong < 101
   endparam
    
    float param h1
      caption = "Hopalong param 1"
      default = 0.4
    endparam
    float param h2
      caption = "Hopalong param 2"
      default = 1
    endparam
    float param h3
      caption = "Hopalong param 3"
      default = 0
    endparam
    float param distscale
      caption = "Distance scale"
      default = 0.06
    endparam
    float param s
      caption = "Attractor scale"
      default = 3
    endparam
    int param max_att_iterations
      caption = "Attractor iterations"
      default = 5
    endparam
    bool param sgn
      caption = "Conjugate transform"
      default = false
    endparam
  }
 

Constructor Summary

REB_TrapShapeHopalong()

REB_TrapShapeHopalong(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_TrapShapeHopalong

public REB_TrapShapeHopalong(Generic pparent)

Constructor

REB_TrapShapeHopalong

public REB_TrapShapeHopalong()

Method Detail

Iterate

public float Iterate(complex pz)

Call this for each iteration being trapped.

Overrides:

Iterate in class TrapShape