What an awesome project! I'm impressed.
This might be the best combination of turtle graphics and object animation I've ever seen :)
- Bert -
On 29.06.2011, at 23:51, Carlos Rabassa wrote:
A few days ago we read about square-wheeled vehicles.
They offer smooth rides, without tilting.
We used Etoys to understand and explain how this square wheels work.
The secret is to roll them on undulated roads.
This Etoys project shows how to build a road with the adequate undulation, by adding material, shown in purple, on the flat origianl surface of the road:
http://www.youtube.com/watch?v=2gDMPYPrxmY
The video also shows all the scripts required to make the square wheel roll over the road while the vehicle´s body, represented by the green line, stays horizontal and always at the same height.
These are some square wheeled vehicles:
4-wheel car http://www.youtube.com/watch?v=ZwgvjTDgFxM
2-wheel bicycle model http://www.youtube.com/watch?v=0hs1wcvhguM
3-wheel tricycles http://www.youtube.com/watch?v=qjUbkzfJGp4&NR=1
Carlos Rabassa Voluntario Red de Apoyo al Plan Ceibal Montevideo, Uruguay