Hi I would like to read a layer from a .dwg (polygons) and add different types of xdata (code 1000/string, code 1002/control, code1005/handle, …) to each polygon in a predefined position (ex. autocad_extended_data_list{6} to {9}) and writing it back to the .dwg source. This is what I did: Read the .dwg using ACAD reader (DXF/DWG)Expose the autocad_extended_data_list{} and its itemsUsing a PythonCaller or AttributeCreator set the values for each item of the listUsing ACAD writer (DXF/DWG) write back the layer to .dwg (set attribute output: Extended Entity Data) Here is the problem: I couldn't get the FME to write back the xdata! I can get my xdata only if I create some "User Attributes" in my outpt layer (feature type properties), however the final values are not what I expected: instead of « string:test1 » I will get « string:"Name of User Attribute"=test1 » ! Could you please help me with that Many thanks Hani

Question

Unable to add xdata to a .dwg

10 years ago
December 10, 2014
4 replies
66 views

hzahiri
6 replies

I would like to read a layer from a .dwg (polygons) and add different types of xdata (code 1000/string, code 1002/control, code1005/handle, …) to each polygon in a predefined position (ex. autocad_extended_data_list{6} to {9}) and writing it back to the .dwg source. This is what I did:

Read the .dwg using ACAD reader (DXF/DWG)
Expose the autocad_extended_data_list{} and its items
Using a PythonCaller or AttributeCreator set the values for each item of the list
Using ACAD writer (DXF/DWG) write back the layer to .dwg (set attribute output: Extended Entity Data)

Here is the problem:

I couldn't get the FME to write back the xdata!

I can get my xdata only if I create some "User Attributes" in my outpt layer (feature type properties), however the final values are not what I expected: instead of « string:test1 » I will get « string:"Name of User Attribute"=test1 » !

Could you please help me with that

Many thanks

Hani

takashi
7676 replies
10 years ago
December 10, 2014

Hi Hani,

If the source features have "autocad_extended_data_list{n}" (n = 6-9), I think you can overwrite them with the AttributeCreator.

Takashi

+15

gio
Contributor
2252 replies
10 years ago
December 11, 2014

not entity_handle. Writer will (re)create it.

hzahiri
Author
6 replies
10 years ago
December 11, 2014

@Takashi

Thanks Takashi, yes you are right. I can modify the values and keep the part which I need in second step, however I was looking for a method to add xdata in one shot. Is it impossible with FME?!

@Gio

You read my mind! here my questions reagrding polygon handles:

1- Is there any way to write xdata to a polygon without touching its handle? in simple words, Is it possible in FME to simply modify a .dwg and not rewrite it?

2- Using FME can I set the value for "autocad_entity_handle" using values from another field?

Many thanks in advance for your answer

Hani

hzahiri
Author
6 replies
10 years ago
December 12, 2014

I kind of found a way out :)

I realized that ACAD writer in each run gives a same handle to polygon! so:

1- Run workspace with ACAD writer for first time

2- Saving "autocad_entity_handle" values in a table using second workspace

3- Run original workspace for sencond time and add entity_handles as xdata for each polygon

I hope that helps the others

Hani

Reply

Rich Text Editor, editor1

Cookie policy

We use cookies to enhance and personalize your experience. If you accept you agree to our full cookie policy. Learn more about our cookies.

Cookie settings

We use 3 different kinds of cookies. You can choose which cookies you want to accept. We need basic cookies to make this site work, therefore these are the minimum you can select. Learn more about our cookies.

Basic
Functional

Normal
Functional + analytics

Complete
Functional + analytics + social media + embedded videos + marketing

Unable to add xdata to a .dwg