BIG roof hole

[Tom Krowka]

Here is a question....I have a donut shape building with a hole in the middle. I want the roof to spring toward the center of the building surrounding the hole, not the hole itself. In other words, there will be two pivot lines, one on the inside circumference, the other on the outside circumference with the peak between them two circumferai (new word). Any way to do it with the multiplane roof tool.

In reality, it's rectangular building, but I thought it would be easier to explain as a donut with the hole in the middle.

Or any other easy way. I know I could do it the manual way with each roof plane individual then trim, but am looking for the labor saving way.

Thanks.

[Barry Kelly]

Sure just place the roof around the outside of your building.
Now right click on that pivot line and choose the 'subtract' option from the pet palette.
Now trace around (or magic wand) the internal shape of the hole where you want that pivot line.
Done.

Barry.

[Tom Krowka]

That will subtract roof from the interior, but it won't make the roof slope upward from the interior of the hole.

[Barry Kelly]

This is what I get.

Barry.

[Barry Kelly]

Make sure you activate the pet palette in the pivot line and not the edge of the roof.

Barry.

[Tom Krowka]

Hey.....that's exactly what I want, but it did not work that way when I did it. It simply cut the hole out of the overall roof but did not add the pivot line to the inside of the donut. How did that happen?

Tom .

[Barry Kelly]

Tom wrote:
Hey.....that's exactly what I want, but it did not work that way when I did it. It simply cut the hole out of the overall roof but did not add the pivot line to the inside of the donut. How did that happen?

Tom .

All I did was place a multi-plane roof and select it.
Left lick on the pivot line (not the roof edge) and select 'subtract' from the pet palette.

Barry.

[Barry Kelly]

Define the area to subtract.

Barry.

[Barry Kelly]

The result.

Barry.

[Barry Kelly]

I do remember seeing a movie on this when the multi-plane roof first appeared but not sure exactly where.
Probably one of the many Archicad Channel you-tube movies.

Barry.