how to cut roofs

[Anonymous]

I am having trouble cutting away portions of a roof that I've created using the roof tool.

The Help directions are as follows:
You may need to make holes in Roofs. Select a Roof pane and start drawing a new contour within its boundaries. The new contour will be interpreted as a hole in the Roof.

I've tried this but the roof deselects as soon as I start drawing the roof within the roof.

How can I remove portions of a roof?

Thank you,
John

[Anonymous]

Do you have the roof tool selected when you try to edit the roof?
Are you trying to cut holes in the roof or edit the edges?

[David Larrew]

Anytime you are trying to edit a building element (roof, slab, etc.) you need to have the element Tool active in the Tool Palette and the element that you want to edit selected.

The Long way:
1. Select the roof.
2. Alt+Click the roof to activate the Roof Tool
3. Click and Hold along the Roof edge or corner to activatre the edit Pet Palette.
4. Select the "-" button.
5. Draw/trace/magic-wand your roof opening.

You can skip the Pet Palette steps once you understand how element editing works.

[Anonymous]

David, Kerry,
Thank you,
John

[LiHigh]

In v8, I don't think you've to select roof tool to edit Roof!
Just have the Roof selected, click on any of the corners or edges, a pet palette come out.............select desired operation.

[Djordje]

LiHigh wrote:
In v8, I don't think you've to select roof tool to edit Roof!
Just have the Roof selected, click on any of the corners or edges, a pet palette come out.............select desired operation.

... and to make a hole you can use subtraction (not Booleans, standard ArchiCAD polygon editing).

Of course, there are also Booleans in 8.0/8.1