FAQ

Q: How do I plot a function z = [my function]?
A: Start a new document. Click Scene > Edit Scene (or click in the toolbar). Replace the function definition with z = [your function], for example, z=(sin(5x)+sin(5y))/5.

Q: How do I plot a curve?
A: Make sure that the Function is Curve button is pressed. Now define x, y and z as function of t. The curve will be plotted with t varying over [0,1]. For example, x=cos(t);y=sin(t);z=0 will give an 1 radian arc. If you need to vary t in a different range, give the transformation in the beginning of the function code, for example t=2 Pi t.

Q: How do I define a parametric surface?
A: Define x, y, z as functions of u and v. Your surface will be plotted as u and v each vary over [0,1]. For example, u=2 Pi u; x=cos(u); y=sin(u); z=v will define a cylinder.

Q: How do I make the parameters u,v, or t vary over a different range than [0,1]?
A: Insert a line in the beginning, for example if you want to change the range of u to [5,15] then add in the beginning, u=u*(15-5)+5.

Q: If I know equation of a curve on x-z plane, how do create a rotational sweep of it along z axis?
A: Define your curve with respecto parameter u or t, and in the end, add: v=2*Pi*v; r=x; x=r*sin(v); y=r*cos(v). Do not forget to turn off Funtion is Curve button. You can modify this to rotate along other axes also.

Q: I can see the surface clearly in Wireframe mode, but it completely disappears when I turn on Solid mode.
A: Turn off the Fog, or increase its range.