Welcome, Guest
Username: Password: Remember me

TOPIC: Intersect function

Intersect function 3 weeks 5 days ago #5776

  • Ruedi
  • Ruedi's Avatar
  • OFFLINE
  • Fresh Boarder
  • Posts: 9
  • Karma: 0
Hi
I've drawn a kajak. It has the layers bottom, side, deck, coaming, and paddler. All is well so far.
Now I'd like to cut out the hole in the deck inside of the coaming, and the unused parts of the walls of the coaming as well.

So I extruded "wall" of the coaming vertically to cut through the deck.

Then I run the function "Intersect".
I'm able to get the new control points in the coaming only, but not in the deck.

This means:
-selection of "coaming" and "deck" works -> creates new control points in the coaming, but none in the deck
the function does what it says: new control points in the coaming, as selected in the function
the unused coaming parts below the deck can be removed

-selection "deck" and "coaming" does not work -> no new control points in the deck, nor in the coaming
removing not used parts of the coaming (below the deck), and the deck inside of the coaming cannot be made

Seems that I've something misunderstood. Any help is highly appreciated.
Attachments:
The administrator has disabled public write access.

Intersect function 3 weeks 4 days ago #5777

  • Icare
  • Icare's Avatar
  • OFFLINE
  • Gold Boarder
  • Posts: 188
  • Thank you received: 34
  • Karma: 5
Hi Ruedi!

When I use the INTERSECTION function, I noticed that the layers' selecting order is important. "Deck" then " Coaming" won't give exactly the same result than "Coaming" then "Deck".
So, I'm used to always use both selections, one after other, to get as many intersection points as possible, then I connect the most convenient points to get the right intersection curve, the I delete the surplus surface.

An other way to do can be to use the OFFSET SURFACE function to draw a temporary surface parallele to the deck, above it, to draw a vertical cylinder thru both surfaces and to ovalize it (the *temporary* coaming's *template*). Then you use the INTERSECTION function to draw the coaming edges and connect them drawing one afet other each polygon of the coaming.
Finaly, you have to punch the hole and delete the temporary surfaces (offset deck and coaming template).

Using this "temporary surface as template" method can be interesting when you have to draw many times the same thing on many places (portholes for example). Instead of deleting the template, just move it to the new place, ask the new Intersection points, draw the new wafer side, delete new unused surface, move, draw, delete again... and again...

Is it clear? Does it help?
The administrator has disabled public write access.
The following user(s) said Thank You: Ruedi

Intersect function 3 weeks 2 days ago #5785

  • Ruedi
  • Ruedi's Avatar
  • OFFLINE
  • Fresh Boarder
  • Posts: 9
  • Karma: 0
Hi Icare
I know how the intersect (not intersection) function works, and the importance of the layer selection order as well. I've tried both orders, and the combination of both orders as well before asking here. None of them delivered what I want to get.

I'll try your suggestion to use an offset surface. My understanding
-I draw a parallel deck surface above the existing deck (tool / Offset surface)
Which value for offset?
Which Layer?

-I draw a vertical cylinder through both deck surfaces
Which diameter and height?
Ovalize to what? My coaming is not oval.
Which Layer?

-I run intersect
Which layers? Which layer sequence?
One or more times with different layers?

-What do you mean with "draw the coaming edges and connect them drawing one afet other each polygon of the coaming"?
I'm puzzled

-If and after all intersection control points are o.k., the deletion of all unneeded surfaces is clear to me

p.s.
have you checked to run intersect with my drawing?
It really does not delver the intersection points needed for proper surface deletion of the deck surfaces inside of the coaming (my opinion)

kind regards
Ruedi
The administrator has disabled public write access.
Time to create page: 0.088 seconds
Powered by Kunena Forum