roof plane sloping in two axes?

[Anonymous]

Hi all,
Any suggestions on how to make a roof slope in two axes? Think shed roof covering a stairway. Sometimes my brain just goes numb/ flat, but this might be a real puzzle. Perhaps some tool I don't know about?
Thanks in advance,
John

[Gerald Hoffman]

John,

I can't quite visualize what you are trying to do. If you want 2 different roof pitches you can do this with 2 roof segments but something tells me this is probably not what you are wanting. Perhaps a sketch or picture or something might help.

Cheers,

[Anonymous]

Hi Gerald,
Simple enough to do in SketchUp: see attached.
Thanks,
John

[Gerald Hoffman]

John,

OK, I see what it is now. I think you could do this with a mesh defining the height of the 4 corners and then copy this mesh displacing it downwards by the desired thickness of the roof plane, using it to SEO the top mesh. You would of course put the second lower mesh on an invisible layer.

My best guess.

[Anonymous]

Gerald,
Thanks! I will give it a shot; I am fairly unfamiliar with meshes.
Best,
John

[Anonymous]

John,
You can do that roof with the roof tool.
When you draw the roof make your pivot line which is the
first thing you draw at 45° to the run of the stairs and then
draw the roof polygon. The pivot line does not have to
be parallel with any edge of a roof.
Peter Devlin

[Anonymous]

Your roof has only one pitch, but it could be a bit tricky to find right direction and angle och it. You could calculate this with SIN and COS or test with help of 2d plane and section/elevation views.

[Link]

TurboGlider wrote:
Your roof has only one pitch, but it could be a bit tricky to find right direction and angle och it. You could calculate this with SIN and COS or test with help of 2d plane and section/elevation views.

You can use the 'Change Roof Slope angle' pet palette option which appears when you click on the corner of a roof in the 3D window. Top side or underside - doesn't matter. The angle pivots around the roof pivot line, so I'd recommend placing your roof pivot line on the outside corner of the wall. It's also based on the underside of your roof, so it may help to set your roof edge angle to plumb cut, even just temporarily.

Cheers,
Link.

[Aaron Bourgoin]

try using a mesh of zero thickness to define the elevations of the roof plane yo want. Then highlight this mesh and invoke the Goodie call Mesh to Roof. This tool determines how to angle the roof pivot line to achieve the compound slope you want.

Ths method will also make sure that your coordinates are correct. If your mesh doesn't snap into two or more pieces, you know you don't have any bent planes.

[Anonymous]

Wow- what a fantastic response! One thing I really appreciate about AC is that there are several ways to do something. Imunna give it a go.
Many thanks--
John