topic Re: Beam's wrong rebar Hook orientation in Revit API Forum

Beam's wrong rebar Hook orientation

REDO10 — Sun, 30 Apr 2023 10:17:57 GMT

Hi everyone,

I tried to create beam’s rebar using Revit API, but I get Hook orientation opposed only when shoosing 90° value!!?..can anyone explain me the reason for that?

Remark: I'm working with Python and Dynamo

Here my graph:

Check my code please:

import sys import clr import math from System.Collections.Generic import IList, List clr.AddReference('RevitAPI') import Autodesk from Autodesk.Revit.DB import * from Autodesk.Revit.DB.Structure import * clr.AddReference('RevitServices') import RevitServices from RevitServices.Persistence import DocumentManager from RevitServices.Transactions import TransactionManager clr.AddReference('RevitNodes') import Revit clr.ImportExtensions(Revit.GeometryConversion) doc = DocumentManager.Instance.CurrentDBDocument curve = IN[0].ToRevitType() bar_type = UnwrapElement(IN[1]) ber_Hook_type = UnwrapElement(IN[6]) host = UnwrapElement(IN[3]) vect = IN[2].ToRevitType() beam_width = IN[4].ToRevitType() width = beam_width.Length cover = IN[5]/0.3048 spacing = 0.10/0.3048 curv = List[Curve]() curv.Add(curve) TransactionManager.Instance.EnsureInTransaction(doc) rebar = Rebar.CreateFromCurves(doc, RebarStyle.Standard, bar_type, ber_Hook_type, ber_Hook_type, host, vect, curv, RebarHookOrientation.Left, RebarHookOrientation.Right, True, False) rebar.GetShapeDrivenAccessor().SetLayoutAsFixedNumber(math.ceil((width-2*cover)/spacing), width-2*cover, True, True, True) TransactionManager.Instance.TransactionTaskDone() OUT= rebar

Could anyone help me ?

Thanks.

Re: Beam's wrong rebar Hook orientation

jayhar — Thu, 04 May 2023 18:05:26 GMT

The reason why you are getting Hook orientation opposed only when choosing a 90° value is because of the way that the `RebarHookOrientation` enumeration is defined in the Revit API.

In Revit, a rebar can have hooks on both ends or on one end only. The `RebarHookOrientation` enumeration is used to specify the orientation of the hooks. For example, `RebarHookOrientation.Left` means that the hook is oriented towards the left end of the rebar, and `RebarHookOrientation.Right` means that the hook is oriented towards the right end of the rebar.

However, when using the `RebarHookOrientation.Angle` option, the hook is oriented relative to the direction of the rebar. If the angle value is less than 90 degrees, the hook is oriented towards the left end of the rebar. If the angle value is greater than 90 degrees, the hook is oriented towards the right end of the rebar.

So, if you want the hook to be oriented towards the left end of the rebar, you should use an angle value less than 90 degrees. If you want the hook to be oriented towards the right end of the rebar, you should use an angle value greater than 90 degrees.

Thanks and Regards

Jayhar M J

Re: Beam's wrong rebar Hook orientation

REDO10 — Thu, 04 May 2023 20:45:30 GMT

Hello @jayhar ,

Thanks for your explanation!!

I understand the premis of RebarHookOrientation (left or rigth) and RebarHookOrientation.Angle and their uses in the code...speaking of your explanation is there an orientation conflicting when a 90° Hook is choosen for the two rebar ends?

By the way, I asked the same question here (dynamobim forum) and this issue happens solely in my case, so what exactely is the reason behaind this?

Thanks.

Re: Beam's wrong rebar Hook orientation

REDO10 — Fri, 05 May 2023 08:58:52 GMT

Hello @jayhar ,

Thanks for your explanation!!

By the way, I asked the same question here (dynamobim forum) and this issue happens solely in my case, so what exactely is the reason behaind this?

Thanks.

Re: Beam's wrong rebar Hook orientation

REDO10 — Sat, 06 May 2023 13:08:24 GMT

Hello @Organon @RPTHOMAS108

Have you any idea how to fix this issue?

Thanks.

Re: Beam's wrong rebar Hook orientation

Organon — Sat, 06 May 2023 15:49:25 GMT

@REDO10,

Sometimes the problem is specifically related to Revit families. Try to use the beam that I attach, it is from Revit 2021.

Regards,

Re: Beam's wrong rebar Hook orientation

REDO10 — Sat, 06 May 2023 20:08:04 GMT

@Organon

Thanks for the shared family

I tested it but I still have the same issue (this issue irritates me and I dont understand why it's happen solely for me 😡)...have you take a look at my thread in dynamobim forum that I linked above ?...I’m down and I don’t know how to solve this issue!!

Thanks.

Re: Beam's wrong rebar Hook orientation

Organon — Sat, 06 May 2023 20:59:59 GMT

@REDO10,

You have to set both hooks to the right.

Re: Beam's wrong rebar Hook orientation

REDO10 — Sun, 07 May 2023 12:04:09 GMT

@Organon

@Organon wrote:
You have to set both hooks to the right.

I've set both hooks to the right then to the left then I reversed between the right and the left for the Hook start and the end and nothing happens !!?? (I'm stuck in an endless loop and I'm sick off it!! ......this is not due to an issue I have in either Dynamo or Revit settings?)

Thanks.

Re: Beam's wrong rebar Hook orientation

REDO10 — Mon, 08 May 2023 15:12:43 GMT

@Organon

As I’m not yet mastering Revit API, and for a temporary solution, can you please put in my script above a condititional “IF” that’s check hook direction and reverse it if it’s wrong?

Thanks.

Re: Beam's wrong rebar Hook orientation

Organon — Mon, 08 May 2023 15:48:30 GMT

@REDO10,

I've created a RVT22 new project, loaded the family I attached, tested your script(booth hooks to the right) and it works fine.

I think your are sick of it because you're trying to do something that is too advanced to you at this point of your learning. Start with easy things first.

Re: Beam's wrong rebar Hook orientation

REDO10 — Thu, 11 May 2023 14:24:27 GMT

@Organon

@Organon wrote:
I think your are sick of it because you're trying to do something that is too advanced to you at this point of your learning. Start with easy things first.

I try to do things as simply as possible and I dont know where is the problem (by chance it only worked once and then it doesn’t work anymore!!??)...see what I'm doing here and judge yourself

Ps: when I selected the 3rd beam (rotated beam )as shown above and executed the script I get the following error (is that related to the rebar or Hook orientation?):

Thanks.

Re: Beam's wrong rebar Hook orientation

REDO10 — Wed, 31 May 2023 11:41:15 GMT

Hi everyone,

My issue is solved just by doing the same thing on this particular one Set rebar circular distribution path and fix wrong hook orientation

Thanks.