World Edit Commands

Sphere (Normalized Coordinates)
  x^2+z^2+y^2 < 1

Sphere (30 Diameter, using -c option)
  x^2+z^2+y^2 < 15^2
Adjusted for better looks
  x^2+z^2+y^2 < 14.8^2

Torus  (Raw Coordinates, 30 major, 8 minor)
  (30-sqrt(x^2+z^2))^2+y^2<8^2

Offset Sphere
  x-=5; x^2+z^2+y^2 < 15^2
Squeezed Sphere
  x*=2; x^2+z^2+y^2 < 15^2
Rotate Torus
  rotate(x,y,1); (30-sqrt(x^2+z^2))^2+y^2<8^2
Rotate Twice
  rotate(x,z,.4); rotate(x,y,1); (30-sqrt(x^2+z^2))^2+y^2<8^2

Nested Rings
  //g -c -h 95:0 rotate(x,z,.4); rotate(x,y,1); (30-sqrt(x^2+z^2))^2+y^2<4^2
  //g -c -h 95:14 rotate(x,z,-.2); rotate(x,y,-.4); (22-sqrt(x^2+z^2))^2+y^2<3^2
  //g -c -h 95:15 rotate(x,z,-1); rotate(x,y,1.3); (16-sqrt(x^2+z^2))^2+y^2<2^2

Multiple Statements and Variables

  95:15   (30-sqrt(x^2+z^2))^2+y^2<8^2
  data=15;  (30-sqrt(x^2+z^2))^2+y^2<8^2
  data=y+7;  (30-sqrt(x^2+z^2))^2+y^2<8^2
  data=(y<0:15:8);  (30-sqrt(x^2+z^2))^2+y^2<8^2
  type=(y<0?1:20);  (30-sqrt(x^2+z^2))^2+y^2<8^2

Ring around a Tower
  //g -c -h 1:4 x^2+z^2<25^2
  ...Select center point...
  //outset 42
  //g -c -h 95 (37-sqrt(x^2+z^2))^2+y^2<8^2
  //g -c -h 95 data=(y<-3?15:0);  (37-sqrt(x^2+z^2))^2+y^2<8^2
  //g -c -h 95 rotate(x,z,-.5); rotate(x,y,.25); data=(y>-4?15:0); (37-sqrt(x^2+z^2))^2+y^2<8^2
  //replace 95:0 173