Hi all,
In my bid to use the Boolean difference for Nurbs surfaces, I got the error as shown in my attached file here. Actually the nurbs boolean difference tool i’m using is as shown on the left above in my attached image here.
I wonder why I can’t do a boolean operation here with Nurbs just like I do with polygons.

Thanks and hope you can help.

obi1.

	Attachment

Make sure you are using the boolean tool from the ‘Surfaces’ menuset, and not the boolean tool from the ‘Polygons’ menuset.

After you select the boolean tool, your cursor should turn into an arrow. Click on the first object, press ‘enter’, and then click on the second object.

n8skow [FA]

n8skow 09 November 2009 11:17 AM

Make sure you are using the boolean tool from the ‘Surfaces’ menuset, and not the boolean tool from the ‘Polygons’ menuset.

After you select the boolean tool, your cursor should turn into an arrow. Click on the first object, press ‘enter’, and then click on the second object.

Hi,
Thanks for your response, but unfortunately, what you proposed still didn’t work for me.
Just like you said here, I did the following:

-->I selected the boolean tool as shown here(but I got error message as seen in my attachment)
-->I clicked on the first object ---> I hit enter---> then I click on the second object

Result:
Beside the error message here, nothing happened.
I wonder if I got the order wrong.

Thanks and hope to hear from you.

Obi1

I have always found the Nurbs boolean tool to be inconsistent at best.  A good workaround is to use “intersect” and “trim”.  The result is the same.

Select the two objects, then select “Edit Nurbs - Intersect - Options”, and in the options, make sure that trim curves are placed on both surfaces. 

Once the curves on surface are in place, you can use the “Trim” tool to delete those areas you don’t wish to keep.  It’s a boolean, but a manual one and a little more user-friendly.

PS - based on your post and description, make sure that you only have two spheres there, and didn’t inadvertently duplicate twice