Good day,
I am looking for a way to set the parameters of a free form rebar before it is created.
After a method executes, I cannot select a shape or layout parameters. What I know is that it takes default rebar shape from rebar shape browser. Probably it does the same with layout rules etc.
Is there a way to set these properties before creating free form rebar?
Sincerely,
Hello,
Free form rebar is a curve driven type of rebar ( as opposed to shape driven rebar ), which means you cannot simply select a shape and assign to it. But if the curves are planar, the free form rebar can be matched to existing shapes.
In order to enable shape matching for free form rebar you have to set the Workshop Instructions parameter to “Bend” ( as shown in attached image ).
From the API you can set it the following way:
Rebar myRebar; // this is the rebar created by “CreateFreeForm” method
// I will skip the validation part ( exception catch, null checks, etc )
RebarFreeFormAccessor freeFormAccessor = myRebar.GetFreeFormAccessor();
using (Transaction t = new Transaction(YourRevitDocument, "Set free form to bent"))
{
t.Start();
freeFormAccessor.WorkshopInstructions = RebarWorkInstructions.Bent;
t.Commit();
}Also, it’s worth mentioning that a Free Form rebar can have multiple shapes ( each individual bar in the Rebar set can have its own shape).
As for the layout, because you are inputting the curves for each bar in the rebar set, we can only set it to Fixed Number and it will be read-only. If you want to change the spacing between the bars you have to update the curves into the new position.
Thanks for your help. I can send a test revit file and my code if needed. In brief:
1. We have 2 or more structural foundations
2. User draws a simple detail line
3. Code reads the surfaces and creates transforms of this line on its surface
4. Creates free form rebar
My code does almost all of the things I listed. Just need to find a way to set rebar shape when creating free form rebar 🙂
Unfortunately, I did not work for me but maybe I used it in a wrong way
1. I specify RebarhookType as null cause I dont need them
2. XYZ norm is host normal?
3. IList<Curve> are the curves I got (in sample case 3 lines)
Result I get is as follows:
Thank You for clearance. The thing is that I have a task to create a "00" type rebar (straight) which is not in reality straight (like in previous 3d picture). Customer told me, that it is a normal practice for them to put that type of bar between 2 or more structural with a slope as in sample.
The aim is to have only one parameter A with value, which is why they request to do that with "00" type.
Furthermore, we need the rebar ends not to touch the ends of structural foundation, that is why I use a detail line.
Probably "createfromcurvesandshape" method is not suitable for me because I need the rebar to look bent.
Seems like we are back to the beginning 😀.
You described exactly the behavior of a free form rebar with the WorkshopInstructions parameter set to Keep Straight. When you have that you can bend the rebar in any way you like and the shape will report a straight shape with only one parameter. This doesn't solve your problem? It's the CreateFreeForm method that you described.
