Objects following the the surface of another

I see, so cookie cutter it so to speak from the roof profile.

Thanks!

If I have a curved surface like a curved roof how can I take another object a cube for example (to make a roof panel) follow the surface of the roof?

Thanks,

Regards, Jack

To follow curves I usually copy and paste part of the curve then extrude

e.g.

Select the width needed and copy.
[img:3jnorcqj]http://www.atomic-album.com/showPic.php/22531/vent1.jpg[/img:3jnorcqj]

Paste back onto the roof object (creating a sub-group)
Scale the length to the correct size.
Select all faces and extrude.
[img:3jnorcqj]http://www.atomic-album.com/showPic.php/22531/vent2.jpg[/img:3jnorcqj]

Position the sub group back to 0,0,0 then move the new object into the same group as the roof.
[img:3jnorcqj]http://www.atomic-album.com/showPic.php/22531/vent3.jpg[/img:3jnorcqj]

Ah, clever!

Thanks!

What if you have a more complex shape? like triangles on a freight car roof? I was thinking of starting with a box then adding the triangles, joining selected, then creating points and edges from those points so there are 5 or 6 edges running the length of the roof, and finally lifting those points to make the curve?

Sound like a flawed plan?

Regards, Jack

The trick is to get the shape to extrude made from the curved surface.

You could copy the whole roof object then do a boolean operation to create the complex shape surface to extrude.