Barry wrote:Same in ITA library.
I can only speak for the AUS (INT?) library, but it seems there is not a 3 arch opening.
However there is a 3 arch window.In realty I'm not sure the geometry is a 3 arch... it's more a squeezed half circle. Or better, an half ellipse (https://en.wikipedia.org/wiki/Ellipse). I guess as you know, ellipse has two centres and the radius changes continuously. 3 arch has 3 centres with two or three radius (maybe left and right radius could be different). This can be combined with lowering center. There should be two parameters: center position with respect to the vertical part, and arc height (L1 and L2 in the last arc of attached example).
You can use that and turn of the 3D detail - you will have an opening.OK, but this are all workarounds... I mean, it should not be too difficult for Graphisoft to create a door hole symbol for elliptical (or 3 arch) holes.
Turn the 2D detail off and there will be no opening in plan - you will have to add a fill.
runxel wrote:I downloaded German Archicad Trial, but didn't find a door opening with 3 center or elliptical arc. There's the same 3 center window opening I have in Italian library, and there are two door objects I haven't in Italian library named "Terassentür Korbb ...", but seems it can't be used as empty opening.
In the German library there is a window and an opening for that already...
It's called "Korbbogen" in German.
runxel wrote:Yes, I know. It's in Italian library too. But it's not really elliptical. And I don't understand way Graphisoft didn't make a port hole, at last from this.
You won't find it with the doors but the windows.
Lingwisyer wrote:Do you mean in construction?
Just curious, how would you actually build an elliptical arch?
mbl wrote:In GDL you can create solid ellipse stretching a cylinder with MUL command. And there is an ELLIPS command for hemisphere ellipsoid (but this could be less suitable). But I guess the more feasible option is to calculate mathematically the coordinates of the points that approximate the elliptical arc based on the resolution parameter.
So I guess Archicad doesn't really like ellipses other than in 2D.