Disappear/reappear

Not sure if this is a bug, but I am trying to have a simple unit (made of three intersecting lines) copy and locate itself at each of its three endpoints. This copy should be oriented with the line it is attaching to (see script)...anyway, when I am changing the angle of the original unit the oriented copies strangely appear and disappear depending on the azimuth angle of the original unit lines.

Move the red colored slider to see that at certain numbers (ie 8, 15, 40) one of the copies will appear and disappear.

I cannot figure out why this is happening - Is this a bug?

Thx

Attachments:

line not there.PNG, 392 KB
Line there.PNG, 432 KB
Branching Script (question for thread).gh, 15 KB

Replies to This Discussion

Permalink Reply by Ethan Davis on September 19, 2015 at 4:09pm

Bueller?

Permalink Reply by David Rutten on September 20, 2015 at 4:06am

I think the problem is that you're using the [Orient Direction] component, which is somewhat underdefined. Using only vectors to indicate a new direction means the component has to invent a rotation around those vectors, which almost always works fine except when the orientation vectors are anti-parallel-ish. Then the rotation becomes undefined and the results become unpredictable.

I recreated you file using Plane orientation (which is not undefined) however due to the nature of your file, it is not possible to make it entirely unambiguous. If the azimuth rotation is 90 degrees, it will still fail.

Attachments: