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Old 19th December 2004, 08:49 AM   #1
Hawk
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Default Hollow pipe-how to

While I''m at posting questions here's another
I wish to draw a hollow tube, meaning a longish pipe with an outside dimeter of say, 8 cm in diameter with a 6mm wall thickness and 3 m long (Example only), visually it does have to be precise, mainly I need to know how what method is used to make a image of a hollow tube. :?:
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Old 19th December 2004, 09:19 AM   #2
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Make two tubes, on the same axis. (don't cap ends)
Say we make them along z axis (Make tube at front view).

One tube size to x=0.8, y=0.8, z=5
One tube size to x=0.6, y=0.6, z=5

Move both to 0/0/0

Take the inner tube, and flip normals

Mark both tubes and merge them.

Create new surfaces at the edge of both tubes

Voila - ready...
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Old 19th December 2004, 09:34 AM   #3
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Default Hollow pipe-how to

Thanks that did the job I have a tube, on the last step
"Create new surfaces at the edge of both tubes" can't get this to work, what needs to be done?
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Old 19th December 2004, 09:40 AM   #4
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Ok, now you have to tubes...

Go to vertice mode

Select two vertices of tube1 and the same two vertices on tube2
Press ctrl-shift S to create a surface between them.

Select vertices counterclockwise...
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Old 19th December 2004, 09:55 AM   #5
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Default Hollow pipe-how to

I'm getting a note and red lines?
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Old 19th December 2004, 12:02 PM   #6
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First the note: Did you merge the two tubes?
Second: Red lines are an invalid poly. If you dont select the single vertices counter clokwise.

Select both tubes in object mode.
press ctrl+shift+M to merge them to one object.

The select two(!) vertices of each tube, where a new surface should be created.
Select those 4 vertices counter-clockwise (thats important)
Then create new surface using ctrl+shift+S
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Old 19th December 2004, 01:02 PM   #7
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An easier method is to make a line 8cm away from the axis, and 6mm long. Then revolve the line (object->revolve) to make a ring. Then extrude the ring to make a pipe.

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Old 19th December 2004, 02:01 PM   #8
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Hehe...

How about:
Draw a disk. Make Hole. Extrude?
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Old 19th December 2004, 02:06 PM   #9
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not really try it and see what you get.

I think you mean

1 - make ellipse
2 - set surface type to poly
3 - make hole
4 - extrude
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Old 19th December 2004, 02:58 PM   #10
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But I was pretty close
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