Compass

To get a given distance in whatever direction: Press over 4 vertices A, B, C, D mantaining the trigger button pressed to choose: the radius AB, the center C, the direction D.

Intersecion of two circles on the space: Press over 5 points A, B, C, D, E mantaining the trigger button pressed to choose the center A and the radios AB of a sphere, the center C and the radious CD of another sphere, and a point E to get the interesection of the two spheres with the plane ACE.

Intersecion of a circle and a plane / Intersection of a sphere and a line coming soon.