the plugins

spirals

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do you want an archimedean lollipop

or an logarithmic one ?

with this plugin you can create spirals with different shapes, sizes or colors

there are two spiral modes:

• archim.
  this mode creates an Archimedean spiral with an equal distance between two windings
• log
  this mode creates a logarithmic spiral with an increasing distance between the windings

the parameters of the plugin:

• no
  with this parameter you can determine how much spirals come out of the origin
  values between 1 and 24 are allowed

• windings
  with this parameter you can adjust how much windings the spiral(s) have

• width
  you can adjust how the ratio between the spiral and the room in between with this parameter:
  • 0 means there will be no spiral at all
  • 0.5 creates an spiral with an symmetric spiral/room ratio
  • 1 means the spiral touches itself

• size
  the x- and y-coordinates are multiplied by this value before doing the calculations; a larger value results in seeing more of the spiral

• rotation
  the spiral is rotated clockwise by this value

• noise
  if this parameter is non-zero (larger than 0.001 to be exactly) it will cause a distortion of the spirals

• value mode
  there are different ways to determine the texture value for a point:
  • 0 points inside the spiral gets the value 1.
  • 1 the value is linear increasing from 0. to 1.
  • 2 the value is linear increasing from 0. to 0.5 and then decreasing to 0.
  • 3 same as before but with an quadratic increasing/decreasing
  • 4-7 the behavior is similar to 0-3 but different spirals gets different values or value intervalls

• no aalias
  with this option you can disable anti-aliasing for this texture even if it was enabled in the render window (it is useful if you use colorbands to avoid artefact effects)

• ani speed
  you can animate this texture by setting this parameter to a value different from 0; the spiral will be rotated ani speed degrees every frame

• bump
  you can turn bump mapping on with this button

• bump size
  you can adjust the bump mapping effect with this parameter

examples here you see a few example pics:

here you can get the C-source and a precompiled version for a linux i386 libc6 and a IRIX system as a gzipped-tar-file: