14.15.4  Spheres: sphere

The sphere command creates spheres.

• sphere takes two arguments:
  P,R, either two points or a point and a real number.
• sphere(P,R) returns:
  • a sphere with diameter PR, if R is a point.
  • a sphere with center P and radius R, if R is a number.

Examples.

• Input:
  sphere([-2,0,0],[2,0,0])
  Output:
  
• Input:
  sphere([0,0,0],2)
  Output: