Version with a major improvement : you can use zoom (and Varcolors) in the field ! Use the slider bar to change: Champs Needles Varcolors Zoom ****************And press on the green flag ********************** Imagine, a magnetic field (champ magnétique in french) and magnetized needles. Imagine a field (un champ) and squalls of wind. Imagine a brook and whirlwinds. Imagine, last but not least, the differantial equations...
Those I prefer : C1 N6 Z4 ;C2 N8 Z6;C3 N16 Z5;C4 N11 Z3;C5 N18 Z6;C6 N12 Z6 Send me the parameters you like ! For others champs : http://scratch.mit.edu/galleries/view/35955 La référence est le livre de Jean-Paul Delahaye "Nouveaux Dessins géométriques et artistiques avec votre micro-ordinateur" aux éditions Eyrolles 1985.
