Change grid extents custom node giving null

Revit
,
1

Hi,

I have adapted the script from here.

I had to recreate the custom nodes in the script using the python code provided in a previous post. However, it’s reaching the final node in the script, and giving null from there. I tried messing with the lacing and the levels of the inputs, but it’s all resulting in different amounts of nulls.

I have included the script, the custom nodes, and a simple revit file to make it easier to take a look at what’s happening. The dynamo files are version 2, and the revit file is 2019 (but can be replicated on any version using a series of grids and 2 lines passing through them).

grid%20extents
grid%20extents590×701 2.01 KB

SetGridExtentsModified2.dyn (84.3 KB)

grid extents.rvt (1.3 MB)
Set Grid Length.dyf (9.6 KB)
Get Grid Length.dyf (8.1 KB)

2

I make some change in your last node call Set Grid Length.
Please check this out and see if it work!

Set%20Grid%20Length

And this is the python script
I suggest you copy the script directly from the node.

import clr
clr.AddReference(‘ProtoGeometry’)
from Autodesk.DesignScript.Geometry import *

#Import DocumentManager and TransactionManager
clr.AddReference(“RevitServices”)
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

#Import RevitAPI
clr.AddReference(“RevitAPI”)
import Autodesk
from Autodesk.Revit.DB import *

clr.AddReference(“RevitNodes”)
import Revit
clr.ImportExtensions(Revit.GeometryConversion)

doc = DocumentManager.Instance.CurrentDBDocument
uiapp = DocumentManager.Instance.CurrentUIApplication
app = uiapp.Application

grids = UnwrapElement(IN[0])
view = UnwrapElement(IN[1])
crvs = UnwrapElement(IN[2])

curves =
curvesViews =

TransactionManager.Instance.EnsureInTransaction(doc)

for i in range(0,len(grids)):
grids[i].SetCurveInView(DatumExtentType.ViewSpecific,view,crvs[i])

TransactionManager.Instance.TransactionTaskDone()

#Assign your outputs to the OUT variable
OUT = grids

Set Grid Length.dyf (9.6 KB)

1 Like
3

Thank you! It’s working now. How did you figure out the problem?

4

Well, I run the script and all the nodes run smoothly except this node: Set Grid Length.dyf.
So I take a look at my own node and decide to make some changes
And viola, I got the problems.

1 Like
5

Capture
Capture.png5314×2424 631 KB

I still get Null when trying to sue this script.

I am using Revit for 1.3. I cant pinpoint why it returns null.

This is my node for setting grid extents:
SetGridExtents_ms.dyn (35.5 KB)

This is my node for getting grid lengths:
Get Grid Lengths_MS.dyf (3.7 KB)

This is my node for setting grid lines:
Set Grid Lines_MS.dyf (4.3 KB)

My python script for set grids is as follows:

import clr
clr.AddReference(‘ProtoGeometry’)
from Autodesk.DesignScript.Geometry import *

#Import DocumentManager and TransactionManager
clr.AddReference(“RevitServices”)
import RevitServices
from RevitServices.Persistence import DocumentManager
from RevitServices.Transactions import TransactionManager

#Import RevitAPI
clr.AddReference(“RevitAPI”)
import Autodesk
from Autodesk.Revit.DB import *

clr.AddReference(“RevitNodes”)
import Revit
clr.ImportExtensions(Revit.GeometryConversion)

doc = DocumentManager.Instance.CurrentDBDocument
uiapp = DocumentManager.Instance.CurrentUIApplication
app = uiapp.Application

grids = UnwrapElement(IN[0])
view = UnwrapElement(IN[1])
crvs = UnwrapElement(IN[2])

curves =
curvesViews =

TransactionManager.Instance.EnsureInTransaction(doc)

for i in range(0,len(grids)):
grids[i].SetCurveInView(DatumExtentType.ViewSpecific,view,crvs[i])

TransactionManager.Instance.TransactionTaskDone()

#Assign your outputs to the OUT variable
OUT = grids

6

what are you doing with curves = and curvesViews =?

I dont understand what these lists do for you.

7

Can you explain what the solution entailed?

Thanks,

8

Hi…@mscottM6C4C…Do we need to download any custom packages because the script shows custom nodes not loaded…Can you tell me the required packages to be downloaded…Thanks in advance

9

yes. You would need to download the custom packages into your Dynamo.