mt
Class MT_GravitationalLens

Object
  common:Generic
      common:Transform
          common:UserTransform
              mt:MT_GravitationalLens

class 
UserTransform:MT_GravitationalLens

Mark Townsend, May 2008

Ultra Fractal Source

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 class MT_GravitationalLens(common.ulb:UserTransform) {
 ;
 ; Mark Townsend, May 2008
 ;
 public:
   func MT_GravitationalLens(Generic pparent)
     UserTransform.UserTransform(pparent)
   endfunc
   
   complex func Iterate(complex pz)
     m_Iterations = m_Iterations + 1
     w = pz - @center
     float r = cabs(w)
     float theta = atan2(w)
     if theta < 0
       theta = theta + 2 * #pi
     endif
     r = r - @a * @a / r
     float x = r * cos(theta)
     float y = r * sin(theta)
     return x + flip(y) + @center
   endfunc
 
 default:
   title = "Gravitational Lens"
   param center
     caption = "Center"
     default = (-.5,.5)
   endparam
   param a
     caption = "Einstein radius"
     default = 1.0
   endparam
 }
 

Constructor Summary

MT_GravitationalLens()

MT_GravitationalLens(Generic pparent)

Method Summary

complex

Iterate(complex pz) Transform a single point within a sequence

Methods inherited from class common:Transform

Init, IsSolid, IterateSilent

Methods inherited from class common:Generic

GetParent

Methods inherited from class Object

Constructor Detail

MT_GravitationalLens

public MT_GravitationalLens(Generic pparent)

MT_GravitationalLens

public MT_GravitationalLens()

Method Detail

Iterate

public complex Iterate(complex pz)

Description copied from class: Transform

Transform a single point within a sequence

After a sequence has been set up with Init(), this function will be called once for each value in the sequence. Note that all values in the sequence must be processed in order (they cannot be processed out of order). If the sequence contains only one value, Init() will still be called and then Iterate() will be called just once.

Overrides:

Iterate in class Transform

Parameters:

pz - the complex value to be transformed

Returns:

the transformed value