mt Class MT_WheelTransform

Object common:Generic common:Transform common:UserTransform mt:MT_WheelTransform

class
UserTransform:MT_WheelTransform

Mark Townsend, May 2008

Ultra Fractal Source
class MT_WheelTransform(common.ulb:UserTransform) {
;
; Mark Townsend, May 2008
;
public:
func MT_WheelTransform(Generic pparent)
UserTransform.UserTransform(pparent)
endfunc

complex func Iterate(complex pz)
m_Iterations = m_Iterations + 1
float  outer = @inner + @width
float r = cabs(pz - @center)
if (r > @inner) && (r < outer)
; within the wheel
float theta = atan2(pz - @center)
if theta < 0
theta = theta + 2 * #pi
endif
float outer_dist = abs(outer - r)
float inner_dist = abs(@inner - r)
if outer_dist < inner_dist
float ratio = @width / outer_dist
else
ratio = @width / inner_dist
endif
theta = theta + real(@fn1(@distort / ratio))
float x = r * cos(theta)
float y = r * sin(theta)
return x + flip(y) + @center
else
return pz
endif
endfunc

default:
title = "Wheel"
param inner
caption = "Inner rim"
default = 0.3
endparam
param width
caption = "Width"
default = 0.6
endparam
param center
caption = "Center"
default = (0,0)
endparam
param distort
caption = "Distortion"
default = 2.0
endparam
func fn1
caption = "Function"
default = ident()
endfunc
}

Constructor Summary
MT_WheelTransform()

MT_WheelTransform(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_WheelTransform

public MT_WheelTransform(Generic pparent)

MT_WheelTransform

public MT_WheelTransform()
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