Animation of a 3D graph : animate3d

### 3.17.2 Animation of a 3D graph : `animate3d`

`animate3d` can create a 3-d animation with function graphs depending of a parameter. The parameter is specified as the third argument of `animate3d`, the number of pictures as fourth argument with `frames=`number, the remaining arguments are the same as those of the `plotfunc` command, see section 3.2.2, p. ??.
Input :

`animate3d(x```^```2+a*y```^```2,[x=-2..2,y=-2..2],a=-2..2, frames=10,display=red+filled)`

Output :

`a sequence of graphic representations of z=x```^```2+``a``*y```^```2 for 11 values of` `a` `between -2 and 2`