Stange behaviour when mirroring Line / Polyline elements of Symbol Type

[Algimantas Kuprenas]

When doing mirror with Line / Polyline elements and using Symbol line type that is not symmetrical along its reference line strange behavior of line representation happens.

Horizontal portions of lines gets upside down, with horizontal sections of lines nothing happens while they should be mirrored. I understand that behind scenes AC just mirroring line with its reference line and direction of line changes, but in this case result of such operation is not works as it should be.

[Barry Kelly]

The horizontal line goes up side down because you are effectively changing the direction it is drawn when you mirror it.

You have drawn the original from left to right.

When you mirror this with a vertical mirror it is now being drawn right to left - hence the line flips upside down.

Whereas the vertical lines are drawn top to bottom or bottom to top, they remain the same when mirrored.

Because they are still drawn in the same direction, top to bottom or bottom to top they don't flip.

Barry.

[Algimantas Kuprenas]

Hi Barry,

I understand how it works in Archicad, but this mirror function gives undesirable result to Line/Polyline Symbol elements. Maybe mirror function should be adjusted when doing mirror to Line / Polyline elements that direction line should not included in Mirror function ?