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Using GC to place AECOsim object with corret ratation??

Yijia Yin
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hej ppl,

I am still quite new to Aecosim with GC extension.

I tried to use GC to place some structural memebers in a grid net generated by GC.

it works fine with horizontal items using ByPoint method, from point A to B. (which means working fine when I am placing a beam)

but its not really working as I wanted if the structural member needs to be place as a column. especially if it needs to be rotated accroding to module net.

please take a look at the attached picture, the dashed red lines are girds, and the column needs to be placed at the intersection, cross section roated correctly along the grids..... but I have checked all the options, I cant use anything like set direction or define coordinatesystem to rotate the cross section. the only way is type in an angel in roatation input..... that is not really what I want....

can anyone give me some hint??

thanks a lot

Leo

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  • 0 Offline in reply to Yijia Yin
    Hi Yijia,
    I haven't found any way yet to rotate a structural column during placement, other than using the Rotation property as you've mentioned. So for now that's the best I can offer, though you could link it/them to a slider instead of inputting direct values.



  • 0 Offline in reply to Steve Cocchi
    Hi Yijia,

    In terms of interactive placement, GC is different from conventional CAD modeling tools. In conventional modeling the placement is the prime opportunity to determine alignments; therefore, placement interaction is very elaborate to enable users to specify that alignment.

    In GC the premise has been that these factors are determined parametrically. Therefore, Rotation on the StructuralMember is a parametric input, usually taken from nodes with which the StructuralMember needs to be aligned, for example a rotated CoordinateSystem that controls the rotation of a building or a building component. When working in a mixed mode, for example with MicroStation Line elements, users could convert characteristic Line elements and then determine from start and end points and a third point placed appropriately aligned with the global x- or y-axis, the angle of Rotation for alignment of the StructuralMember. Specific methodology usually varies situationally.

    Thus, mixed mode may appear a bit more tedious than a parametric design from the ground up.

    This is definitely yet another opportunity for enhancements especially if those can be conceived in a manner that does not reduce usability in other frequent situations.

    Regards,

    Volker

     

  • 0 Offline in reply to Mueller
    thanks Volker and Steve,
    What I am looking for is, if I have definede a roatated coordinate system (fx, along a line), than using the coordinate system as placement for the structural members. I was hoping the object will align to x or y axis as it does when placing a GC 2d cell. but I guess so far, I should just define an dirction/formual input to rotation of the object. thanks for the answer, if there is chance please take this wish in to consideration for the future update of GC. thx
    Leo
  • 0 Offline in reply to Yijia Yin
    Hi Yijia,
    I think part of the problem is that a structural member's rotation in regards to the ACS is actually along its length; i.e., the member line connecting the P & Q points (which are linked to GC Point nodes). So in the case of a column it would essentially be rotating from vertical to some other angle, whereas beams typically rotate about the Z axis (which in most cases is not unusual).

    The Rotation property itself is a numeric data type which is why it doesn't connect with an ACS. I'm not sure how we could accomplish rotating a member about itself in some other fashion, so as Volker mentioned perhaps it's best to log a Service Request with support so this can be filed as an Enhancement request.



  • 0 Offline in reply to Steve Cocchi
    Hej Steve,
    thanks for you explaination on the topic, now I have a better understanding on what is going on inside the object. so that I can find my walk around. thx.
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