###### Descriptions and Examples for the POV-Ray Raytracerby Friedrich A. Lohmüller About Loops with POV-Ray
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Home
- POV-Ray Tutorial

Loops in POV-Ray
1. For + While
Comparison
2. Linear
Transformations
3. Circular
Transformations
4. Moebius etc.
5. Screws
& Spirals
>6. Twisting
Spirals
7. Snails
& Ammonites
8. Spherical Spirals 1
9. Spherical Spirals 2
10. Fibonacci Spirals

## Loops and Twisting Spirals

In the last samples we mostly used spheres. If we use ellipsoids instead then we win the possibility to turn them around in a Moebius like way.

First a spiral made with ellipsoides:

 ```//------------------------------------- #declare Ball = sphere{ <0,0,0>,0.45 scale <0.7,1.5,1> // !!! texture{ pigment{ color rgb<1,0.6,0>} finish { phong 1}}} //the rest like in the previous sample!```

Scene file for POV-Ray: povloop9b.pov
or: povloop9b.txt

Now we twist these ellipsoids around their way:

 ```//------------------------------------ ... #while (Nr< EndNr) object{Ball rotate <0,0,Nr*0.5> // !!! translate rotate<0,Nr * 360/N_p_rev ,0>} #declare Nr = Nr+1; // next Nr ... //------------------------------------```

Scene file for POV-Ray: povloop9d.pov
or: povloop9d.txt

Twisting stronger we see what we get:
- A new strange live form?

 ```//------------------------------------ ... #while (Nr< EndNr) object{Ball rotate <0,0,Nr*3.5> // !!! translate rotate<0,Nr * 360/N_p_rev ,0>} #declare Nr = Nr+1; // next Nr ... //------------------------------------```

Scene file for POV-Ray: povloop9e.pov
or: povloop9e.txt

 Overview | For + While | Linear | Circular | Moebius | Screws+Spirals | Twisted Spirals | Snails | Spherical 1 | Spherical 2 | Fibonacci |
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 © Friedrich A. Lohmüller, 2014 http://www.f-lohmueller.de