How to trim 3ds?

hi ,

i would like some help with this project..

I would like to trim the triangles but everytime i try , unfortunately i delete either the sphrere either the triangles..

Can someone fix it for me or can someone tell me how to do it?

Sorry for my english ..

thank u

orbit.dwg

When you say trim the triangles are you trying to eliminate the portion of the triangles that pass through the wall of the dome and into the interior of it?

Are you also trying to trim the triangles where they cross each other as well?

A bit more detail would be helpful. Thanks.

Getting rid of the triangles within the dome won't be much of a problem. There could be a bit of a problem using one triangle to trim away an adjacent triangle. however, I still think it can ultimately be accomplished. Just depends on what you want the final product to look like.

I would like to eliminate the portion of the triangles that pass the wall but also the parts where the triangles connect with each other and down.

Use the SUBTRACT and SEPARATE commands to remove the triangles inside the dome. You may have to temporarily duplicate some of the geometry off to one side since you have five objects (one dome but four triangles). This first part should be quite easy. As for the triangles, where they cross themselves on the exterior of the dome, well that would normally be the same procedure but you may run into a problem due to the shape of the triangles. I was able to accomplish the task on the first triangle I work with but not the second. I've been kind of busy these last couple of days so I haven't had time to revisit the problem. I'll try taking another look later today (6/7) or tomorrow.

I suppose (hope!) your model is symmetrical.

So I aligned it parallel to the x- and y-axis, sliced the quarter-part (cone) in the first quadrant. Then I used (the mentioned above) SUBTRACT and SEPARATE th remove the inner-dome parts.

And the I mirrored the sliced cone at the axis to get the 4-cone-model.

But my assumption is symmetry - in the original model are slightly irregularyties...

Good luck

Jochen

orbit04.dwg

I too noticed the same irregularities that scj mentions. And like scj as well my thought was you were striving towards symmetry. Feel free to correct us if we are wrong.

thank you so muchhh for your help....