Freeflight Design Shop Forum

Boolean Operations

Posted by JamesE on Tuesday, 25 December 2001, at 2:33 p.m.

Can someone please explain how to do these in Gmax? I'm trying to cut an aileron out of a wing (moving points around wont work), and I am stuck as to what to do with it. Is Boolean the thing I want anyway?

Responses

(Note that there are two responses - by Chris and Graham...)

• Posted by Chris on Tuesday, 25 December 2001, at 5:26 p.m., in response to Boolean Operations, posted by JamesE on Tuesday, 25 December 2001, at 2:33 p.m.

Assuming you want to keep the part you remove and use it as the aileron this is how i do it.

1) Make a copy your wing keep it in the same place

2) Create a box that is no wider than the aileron but a bit higher and longer

3) Position it over the wing where you want the aileron

5) In geometry->compound objects select boolean

6) set operand b to be a copy and click pick

8) now set the operation to intersection

9) now select your origional wing

10) goto boolean again and set operand b to move and select your box again

11) now set the operation to A-B

12) this leaves you with a wing that has a hole for the aileron and an object (with the name of your cloned wing) for your aileron.

13) you may need to create some new polys on each of the objects if they were edit meshes to fill in the blank faces

Chris File

takeoff.to/landing

• Posted by Gaham Waterfield PSS on Wednesday, 26 December 2001, at 4:59 a.m., in response to Re: Boolean Operations, posted by Chris on Tuesday, 25 December 2001, at 5:26 p.m.

There's a much easier way guys ....

Follow Chris's instructions (below) but with my edits ...

> 2) Create a box that is no wider than the aileron but a bit higher
> and longer

> 3) Position it over the wing where you want the aileron

NEW FROM HERE ----

#4 Select your wing (no need to clone but hit Edit->hold just in case)

#5 In geometry->compound objects select boolean

#6 now set the operation to "CUT" and check the "REFINE" section

#7 Press "pick operand B" Button then select the NEW box

#8 Go back to the Modifiewrs Tab and convert the resultant object back to "Editable Mesh"

#9 Show the objects tree and select Element (this will normally highlight the aileron only but if not, simply select it yourself)

#10 Hit the DETACH button and name the object as you wish

BACK TO CHRIS's METHOD

> 7) you may need to create some new polys on each of the objects
> to fill in the blank faces

There ... is that better ? :)

Graham

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