3D implicit surface

### 5.10.2 3D implicit surface

- plotimplicit(f(x,y,z),x,y,z) draws the graphic representation of the surface defined by the implicit equation f(x,y,z)=0,
- plotimplicit(f(x,y,z),x=0..1,y=-1..1,z=-1..1) draws the surface defined by the implicit equation f(x,y,z)=0, where 0≤ x ≤ 1, −1≤ y ≤ 1 and −1≤ z ≤ 1.

It is possible to add three arguments to specify the discretization steps used for x, y and z with xstep=..., ystep=... and zstep=....
Input :

plotimplicit(x`^`2+y`^`2+z`^`2-1,x,y,z, xstep=0.2,ystep=0.1,zstep=0.3)

Input :

plotimplicit(x`^`2+y`^`2+z`^`2-1,x,y,z, xstep=0.2,ystep=0.1,zstep=0.3,unfactored)

Output :

The unit sphere

Input :

plotimplicit(x`^`2+y`^`2+z`^`2-1,x=-1..1,y=-1..1,z=-1..1)

Output :

The unit sphere