Equation based surface

[rounakmehta]

Hi,

I wanted to model a surface in AutoCad given by the equation z = sin(x)*sin(y). I tried doing this using the 3DPlot plug in but it didnt work for some reason. It always output '400' instead of creating some figure.  Could you please suggest how I could do this using 3DPlot or otherwise?

[hgasty1001 · Accepted solution]

Hi,

Try this:

(defun eggbox(x y)(list x y (* (sin x)(sin y))))

(3Dplot -5 5 0.2 -5 5 0.2)

Gaston Nunez

[rounakmehta]

Hey Gaston,

Thanks for your reply! It worked, but I have another problem.

I want to export the shape that I create using 3DPlot in .sat format. When I click the export option and select the surface it says ' No Solids, regions or ShapeManager bodies selected'. However, when I tried to export it in the .igs format it works. How do I resolve this?

[hgasty1001]

Hi,

In order to export to sat format, you should convert the polyface mesh to a mesh and then to a surface, try this:

1.-Menu Modify->Surface Editing->Convert to Mesh

2.--Menu Modify->3D Operations->Convert to Surface

3.- Export to sat

Gaston Nunez

[vladimir_michl]

A small correction to the gasty's answer - the right 3DPlot expression is:

(defun eggbox(x y)(list x y (* (sin x)(sin y))))

(3Dplot eggbox -5 5 0.2 -5 5 0.2)

You can use the embedded command 3DPTHICKEN to make 3D solids from the 3DPLOT-generated surfaces. See:

http://www.cadstudio.cz/en/apps/3dplot/

Feel free to contact us for any enhancement to our 3DPLOT utility.

Vladimir Michl, www.cadstudio.cz  www.cadforum.cz