DMJ_TrapShapeFBM

 class DMJ_TrapShapeFBM(common.ulb:TrapShape) {
   ; Fractional Brownian Motion (fBm) trap shape class.
   
 public:
   import "common.ulb"
   
   func DMJ_TrapShapeFBM(Generic pparent)
     TrapShape.TrapShape(pparent)
 
     m_Noise = new @f_noise(this)
     m_Rotation = (0,1) ^ (@p_angle / 90.0)
     m_RotationStep = (0,1) ^ (@p_anglestep / 90.0)
   endfunc
 
   func Init(complex pz)
     TrapShape.Init(pz)
     
     m_Noise.Init(pz)
   endfunc
   
   float func Iterate(complex pz)
     TrapShape.Iterate(pz)
 
     float sum = 0.0
     float amplitude = 1.0
     float basis = 0.0
     
     pz = pz * @p_scale * m_Rotation + @p_offset
     
     int j = 0
     while (j < @p_octaves)
       basis = m_Noise.Iterate(pz) * amplitude
       
       sum = sum + basis
       amplitude = amplitude * @p_step
       pz = pz * m_RotationStep / @p_step
     
       j = j + 1
     endwhile
 
     if (@p_octaves - floor(@p_octaves) > 0)
       sum = sum - basis
       basis = basis * (@p_octaves - floor(@p_octaves))^(@p_step)
       sum = sum + basis
     endif
 
     return sum
   endfunc
   
 protected:
   TrapShape m_Noise
   complex m_Rotation
   complex m_RotationStep
 
 default:
   title = "fBm"
   
   int param v_dmj_trapshapefbm
     caption = "Version (DMJ_TrapShapeFBM)"
     default = 100
     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_dmj_trapshapefbm < 100
   endparam
 
   TrapShapeNoise param f_noise
     caption = "Noise Basis Function"
     default = TrapShapeNoise
     hint = "Sets the noise function that is used as the foundation for the fractional noise computation."
     expanded = false
   endparam
 
   float param p_scale
     caption = "Scale"
     default = 1.0
     hint = "This is the overall scale of the noise. Larger numbers will produce finer-grained noise."
   endparam
   float param p_angle
     caption = "Rotation"
     default = 0.0
     hint = "This is the angle, in degrees, of the noise."
   endparam
   float param p_step
     caption = "Scale Step"
     default = 0.5
     min = 0.0
     hint = "This is the step in scale between noise iterations. Reducing this value will result in noise with less 'bumpiness'."
   endparam
   float param p_anglestep
     caption = "Rotation Step"
     default = 37.0
     hint = "This is the angle, in degrees, to rotate between noise iterations. You should use values that do not divide evenly into 360 for best results."
   endparam
   float param p_octaves
     caption = "Octaves"
     default = 7
     min = 1
     hint = "This is the number of iterations of the noise formula. More iterations will add progressively finer variations to the noise. If you use a non-integer value, the final iteration's contribution will only be partially used."
   endparam
   complex param p_offset
     caption = "Offset"
     default = (0,0)
     hint = "This is the offset of the entire pattern. This offset is applied only once, after scale and rotation."
   endparam
 }

Method Summary
`void`	`Init(complex pz)` call this before each sequence of values to be trapped
`float`	`Iterate(complex pz)` call this for each iteration being trapped

Constructor Summary
`DMJ_TrapShapeFBM()`
`DMJ_TrapShapeFBM(Generic pparent)`

dmj5 Class DMJ_TrapShapeFBM

DMJ_TrapShapeFBM

DMJ_TrapShapeFBM

Init

Iterate

dmj5
Class DMJ_TrapShapeFBM