Issues creating an empty surface with dynamo

rpriceAZEG6 · March 25, 2022, 6:21pm

I’m trying to use Dynamo to import and clip a DEM. The process: create empty surface → add data clip boundary → add DEM. However, I cannot find a working way to create an empty surface. I’ve tried using a bit of code found here:

However, this code no longer seems to work. Every time the python node tries to grab the surface style styleId = cdoc.Styles.SurfaceStyles[styleName] an exception is thrown.

Could anyone point me in the right direction?

hosneyalaa · March 25, 2022, 6:48pm

Hi
Can you share the python code you are working on?
and an example file

rpriceAZEG6 · March 25, 2022, 7:12pm

Since I’m just creating a surface from scratch any file will do. The error occurs when I attempt to subscript the style list e.g. “styleId = cdoc.Styles.SurfaceStyles[0]”. Remove the “[0]” and the error goes away. But I don’t know enough about the API to say why it’s behaving this way. As I understand it, I’ll need the style from this list for the TinSurface.Create() function.

Load the Python Standard and DesignScript Libraries

import sys
import clr

Add Assemblies for AutoCAD and Civil3D

clr.AddReference(‘AcMgd’)
clr.AddReference(‘AcCoreMgd’)
clr.AddReference(‘AcDbMgd’)
clr.AddReference(‘AecBaseMgd’)
clr.AddReference(‘AecPropDataMgd’)
clr.AddReference(‘AeccDbMgd’)

Import references from AutoCAD

from Autodesk.AutoCAD.Runtime import *
from Autodesk.AutoCAD.ApplicationServices import *
from Autodesk.AutoCAD.EditorInput import *
from Autodesk.AutoCAD.DatabaseServices import *
from Autodesk.AutoCAD.Geometry import *

Import references from Civil3D

from Autodesk.Civil.ApplicationServices import *
from Autodesk.Civil.DatabaseServices import *

The inputs to this node will be stored as a list in the IN variables.

surfaceName = IN[0]
styleName = IN[1]

adoc = Application.DocumentManager.MdiActiveDocument
editor = adoc.Editor

with adoc.LockDocument():
with adoc.Database as db:
    with db.TransactionManager.StartTransaction() as t:
        cdoc = CivilApplication.ActiveDocument
        
        # list of existing Surfaces
        #SurfaceIds = cdoc.GetSurfaceIds()
        #for surfaceId in SurfaceIds:
        #   oSurface = surfaceId.GetObject(OpenMode.ForRead)
        #  if oSurface.Name == surfaceName:
        #      myEnt = t.GetObject(surfaceId, OpenMode.ForWrite)
        #      myEnt.Erase(True)

        # Select a Surface style to us
        styleId = cdoc.Styles.SurfaceStyles[0]
        #styleId = styleId_list[0]
        #styleId = cdoc.Styles.SurfaceStyles[styleName]
        # Create an empty TIN Surface
        #surfaceId = TinSurface.Create(surfaceName, styleId)
        #newSurface.append(surfaceId)
        # get Object
        # surface = t.GetObject(surfaceId, OpenMode.ForRead)
        # Commit before end transaction
        t.Commit()
        pass
Assign your output to the OUT variable.

OUT = styleId

hosneyalaa · March 25, 2022, 7:40pm

Hi
Try



import clr

clr.AddReference('AcDbMgd')
clr.AddReference('AeccDbMgd')
clr.AddReference('AutoCADNodes')
clr.AddReference('Civil3DNodes')   

from Autodesk.AutoCAD.ApplicationServices import *
from Autodesk.AutoCAD.DatabaseServices import *
from Autodesk.Civil.ApplicationServices import *
from Autodesk.Civil.DatabaseServices import *
import Autodesk.AutoCAD.DynamoNodes as DA
import Autodesk.Civil.DynamoNodes as DC

adoc = Application.DocumentManager.MdiActiveDocument
cdoc = CivilApplication.ActiveDocument

def create_tin():

    
    global adoc
    global cdoc

    with adoc.LockDocument():
        with adoc.Database as db:    
            with db.TransactionManager.StartTransaction() as t:
                surfId = TinSurface.Create(db, "test")
                surf = t.GetObject(surfId, OpenMode.ForWrite)

                t.Commit()
                pass
    return surf

OUT = create_tin()

JPS · April 13, 2022, 5:48am

Hi all,

The last code sample does work, but i had the next code working in C3D 2021, in 2022 it’s not working anymore. Does anyone has a solution?

The lines

styleId = cdoc.Styles.SurfaceStyles[styleName]
surfaceId = TinSurface.Create(surfaceName, styleId)
don’t work anymore

Load the Python Standard and DesignScript Libraries

import sys
import clr
import math

Add Assemblies for AutoCAD and Civil 3D APIs

clr.AddReference(‘AcDbMgd’)
clr.AddReference(‘AeccDbMgd’)
clr.AddReference(‘AutoCADNodes’)
clr.AddReference(‘Civil3DNodes’)

Import references from AutoCAD

from Autodesk.AutoCAD.ApplicationServices import *
from Autodesk.AutoCAD.DatabaseServices import *

Import references from Civil3D

from Autodesk.Civil.ApplicationServices import *
from Autodesk.Civil.DatabaseServices import *

import Autodesk.AutoCAD.DynamoNodes as DA
import Autodesk.Civil.DynamoNodes as DC

#Import References from dynamo
from Autodesk.AutoCAD.DynamoNodes import SelectionByQuery

The inputs to this node will be stored as a list in the IN variables.

surfaceName = IN[0]
styleName = IN[1]
MaximumTriangleLength = IN[2]
MaximumAngleBetweenAdjacentTinLines = IN[3]
deleteSurface = IN[4]

adoc = Application.DocumentManager.MdiActiveDocument

def delSurface(surfaceName):
global adoc
with adoc.LockDocument():
with adoc.Database as db:
with db.TransactionManager.StartTransaction() as t:
cdoc = CivilApplication.ActiveDocument
# list of existing Surfaces
SurfaceIds = cdoc.GetSurfaceIds()
for surfaceId in SurfaceIds:
oSurface = surfaceId.GetObject(OpenMode.ForRead)
if oSurface.Name == surfaceName:
myEnt = t.GetObject(surfaceId, OpenMode.ForWrite)
myEnt.Erase(True)
# Commit before end transaction
t.Commit()

def selSurface(surfaceName):
global adoc
surface = “”
with adoc.LockDocument():
with adoc.Database as db:
with db.TransactionManager.StartTransaction() as t:
cdoc = CivilApplication.ActiveDocument
# list of existing Surfaces
SurfaceIds = cdoc.GetSurfaceIds()
for surfaceId in SurfaceIds:
oSurface = surfaceId.GetObject(OpenMode.ForRead)
if oSurface.Name == surfaceName:
obj = t.GetObject(surfaceId, OpenMode.ForRead)
# Commit before end transaction
t.Commit()
surface = SelectionByQuery.GetObjectByObjectHandle(str(obj.Handle))

return surface
#==============================================================================================

Boolean {deleteSurface}

True => delete surface and create new surface

False => Select surface

#==============================================================================================
newSurface =
surfaceId=""
styleId=""

if deleteSurface == False:
newSurface = selSurface(surfaceName)

if deleteSurface == True:
delSurface(surfaceName)

with adoc.LockDocument():
with adoc.Database as db:
with db.TransactionManager.StartTransaction() as t:
cdoc = CivilApplication.ActiveDocument
print(“Start - Create surface”)
# Select a Surface style to use
styleId = cdoc.Styles.SurfaceStyles[styleName]
print(styleId)
# Create an empty TIN Surface
surfaceId = TinSurface.Create(surfaceName, styleId)
print(surfaceId)
# get Object
surface = t.GetObject(surfaceId, OpenMode.ForRead)
#newSurface.append (surface)
#surfId = TinSurface.Create(db, “test”)
#surf = t.GetObject(surfId, OpenMode.ForWrite)

       # Commit before end transaction
       t.Commit()
       pass
       newSurface = SelectionByQuery.GetObjectByObjectHandle(str(surfaceId.Handle))

Assign your output to the OUT variable.

OUT = newSurface

hosneyalaa · April 13, 2022, 4:52pm

Hi i think wrong in writing name style

Try using
styleId = cdoc.Styles.SurfaceStyles[1]

JPS · April 18, 2022, 10:40am

Hi @hosneyalaa ,

Unfortunately that doesn’t work, if you take a look at the link:

The sample code:

//change the style
ObjectId styleId;
if (civilDoc.Styles.SurfaceStyles.Contains(“Standard”))
{
styleId = civilDoc.Styles.SurfaceStyles[“Standard”];
}
else
{
// create a new style called ‘example style’:
styleId = civilDoc.Styles.SurfaceStyles
.Add(“example style”);

}
// modify the style
SurfaceStyle surfaceStyle = styleId.GetObject(
OpenMode.ForWrite) as SurfaceStyle;

My code must work, as it did before.

hosneyalaa · April 18, 2022, 4:50pm

Hi @JPS
what do you want to do You create a surface
and then change its style
Or
do you want Create a new surface style
and modify it

Because this is a different topic

JPS · April 21, 2022, 7:56am

I want to use an existing style.

First find the ID and then change the style.

hosneyalaa · April 23, 2022, 5:16am

Q10

mzjensen · July 1, 2022, 6:05pm

FYI there are dedicated nodes for this in the Camber package starting in v4.0.0.

Topic		Replies	Views
Civil 3D - Python- create (tin)surface - Output Civil3D	7	1927	June 17, 2021
Is there a way to add a DEM file to a surface with Dynamo? Civil3D	15	747	March 23, 2023
Creating solids from volumetric surfaces via dynamo Civil3D	5	1475	April 12, 2021
Generate Solids Between TIN Surfaces with Dynamo for Civil 3D Civil3D python , dynamo , civil3d	16	2343	July 12, 2022
Civil 3D TIN Surface from Dynamo geometry Polysurface Civil3D dynamo	5	254	November 27, 2023

Issues creating an empty surface with dynamo

Load the Python Standard and DesignScript Libraries

Add Assemblies for AutoCAD and Civil3D

Import references from AutoCAD

Import references from Civil3D

The inputs to this node will be stored as a list in the IN variables.

Assign your output to the OUT variable.

Load the Python Standard and DesignScript Libraries

Add Assemblies for AutoCAD and Civil 3D APIs

Import references from AutoCAD

Import references from Civil3D

The inputs to this node will be stored as a list in the IN variables.

Boolean {deleteSurface}

True => delete surface and create new surface

False => Select surface

Assign your output to the OUT variable.

Related topics