Beam's wrong rebar Hook orientation

[REDO10]

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.

[jayhar]

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 

[REDO10]

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.

[REDO10]

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.

[REDO10]

Hello @Organon  @RPTHOMAS108 

Have you any idea how to fix this issue?

Thanks.

[Organon]

@REDO10,

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

Regards,

[REDO10]

@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.

[Organon]

@REDO10,

You have to set both hooks to the right.

[REDO10]

@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.

[REDO10]

@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.

[Organon]

@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.

[REDO10]

@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.

[REDO10 · Accepted solution]

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.