Hello @Cairyn,

thank you for reaching out to us.

Clarification: I am not looking for the iteration of objects, for the selection, or for the folding. Just for the method that will show the object/the track in timeline xxx.

I wouldn't mind if someone could confirm that there is no access at all to the Timeline elements, or present an alternative...)

You can add BaseList2D to a Timeline Manger by simply adding a CTrack to them. But you are probably after the special case where an object is being placed by drag and drop into a Timeline. This is a special case since the object has then no track. When you delete the last track of an object in a Timeline, then the object will be removed. This makes the drag and drop case a special case. Internally, the objects of a Timeline Manager are tracked in a list-like structure which is populated by traversing a document and events like object creation or drag and drop. It will automatically ingest all BaseList2D that have a track (and remove such that do not have tracks anymore). Nodes without a track that have been dragged and dropped into a Timeline are added "manually" to that list without being deleted. This works as far as I understand with a GeMarker being added to them. So technically, one might be able to replicate this in C++ by also adding that marker, but its content is not public and might carry other side effects.

What I found out while playing around with tracks, is that one can add "fake" tracks by either completely making up a track id, which are then called just "track", or incomplete ids, e.g., for the position of an object. This could serve as a clean slate if desired but could also have side effects.

ac3dd38c-8e5d-4f48-a3cd-941ae2c987cc-image.png

descId = c4d.DescID(c4d.DescLevel(c4d.ID_BASEOBJECT_REL_POSITION, c4d.DTYPE_VECTOR, 0)) track = c4d.CTrack(op, descId) op.InsertTrackSorted(track) c4d.EventAdd()

Preventing the object being removed from the Timeline when deleting its last track is not possible in Python. At least I do not see a way to do it at the moment.

Cheers,
Ferdinand

Oh! Forget guys my message above!

The calling of Python code from C++ plugin in @kbar 's advice does the trick! 🙂

If someone from the future who will read this thread will need the code example, I just use the code snippet from here: https://developers.maxon.net/docs/cpp/2023_2/page_maxonapi_python.html

and feed to it this code:

// call it from somewhere String code = "import c4d\nimport maxon\nimport os "; code+= "\n\nprint(f'This is simple message')"; code += "\nos.rename('C:/Code/sdk/plugins/myPlugin/myPlugin.xdl64', 'C:/Code/sdk/plugins/myPlugin/old_myPlugin.old')"; ExecutePythonScript(code, GetActiveDocument());

😄

Thank you very much!

Okay, thanks for the heads up 🙂

Hello @mfersaoui,

Without any further questions, we will regard this topic as solved and flag it accordingly by Monday, September, the 8th.

Thank you for your understanding,
Ferdinand

Hello @tdapper ,

Without any further questions, we will regard this topic as solved and flag it accordingly by Monday, September, the 8th.

Thank you for your understanding,
Ferdinand

Hello @yaya,

thank you for reaching out to us. Your example does build for me in R23, at least regarding the mentioned line of code:

const maxon::InputStreamRef inputStream = webFile.OpenInputStream() iferr_return;

Your example is however incomplete, it is missing the include statement to include iostreams.h which is likely causing your error. But there should be more errors for you in this stretch of code, since for example the line const maxon::Url webFile = (maxon::Url("https://www.mysite.com/Somevideo.mp4"_s))iferr_return is also incorrect. Find a commented example at the end of my posting for details.

On SDK help search there is no a link to a "InputStreamRef".

The maxon API does provide in C++ a managed memory environment, i.e., garbage collection, akin to managed languages like C# or Python. Which means all objects are split into the actual object instance and references to that instance. The object instance is then reference counted and deallocated once there are no references to it anymore. So, when you have a ThingRef, it is actually just a reference to an instance of a ThingInterface (at least most of the time, copy-on-write object references do not have the Ref postfix, i.e., the reference for a COW ThingInterface would be called Thing). The Doxygen parser (the tool we are using for documentation) does struggle heavily with all the metaprogramming we do and cannot properly ingest Ref entities. This is a bit tricky subject we are aware of and working on to, but this will take some time.

Long story short, you would have to search here for InputStreamInterface. There is also our Entity Creation Manual which does expand a bit on the topic of interfaces and their references.

If you continue to have problems, please make sure to post your full code and not just a snippet, as it otherwise mostly guesswork for us to figure out where your problem lies.

Cheers,
Ferdinand

// You must include this header in order to have access to the full interface definitions. #include "maxon\iostreams.h" maxon::Result<void> SomeFunction() { iferr_scope; // The iferr_return here was incorrect. In our example it is required because we concatenate there // two urls. UrlInterface.operator+ is a maxon::Result, i.e., requires error handling. Just // initializing a Url does not have any error handling and therefor requires no iferr_return. const maxon::Url url("https://www.mysite.com/Somevideo.mp4"_s); const maxon::UrlScheme scheme = url.GetScheme(); const maxon::Bool isHTTP = scheme == maxon::URLSCHEME_HTTP; const maxon::Bool isHTTPS = scheme == maxon::URLSCHEME_HTTPS; if (isHTTP || isHTTPS) { const maxon::InputStreamRef inputStream = url.OpenInputStream() iferr_return; const maxon::Int length = inputStream.GetStreamLength() iferr_return; maxon::BaseArray<maxon::Char> data; data.Resize(length) iferr_return; inputStream.Read(data) iferr_return; inputStream.Close() iferr_return; // trgetUrl was not defined in your/our example, so I did redefine it here as someUrl. const maxon::Url someUrl("https://www.yoursite.com/"_s); // This will be "https://www.yoursite.com/Somevideo.mp4", i.e., GetName returns the last // component of a Url, e.g., "Somevideo.mp4" in this case. Here we need the iferr_return, since // UrlInterface.operator+ can fail, i.e., return an error. const maxon::Url anotherUrl = (someUrl + url.GetName()) iferr_return; const maxon::OutputStreamRef outputStream = anotherUrl.OpenOutputStream() iferr_return; outputStream.Write(data) iferr_return; outputStream.Close() iferr_return; } return maxon::OK; }

Hello @Артём,

without any further questions, we will consider this topic as solved by Tuesday, November the 2nd and flag it accordingly.

Thank you for your understanding,
Ferdinand

Hello @orestiskon,

without any further questions, we will consider this topic as solved by Tuesday, November the 2nd and flag it accordingly.

Thank you for your understanding,
Ferdinand

Hello @kbar,

without any further questions, we will consider this topic as solved by Tuesday, November the 2nd and flag it accordingly.

Thank you for your understanding,
Ferdinand

Hello @orestiskon,

without any further questions, we will consider this topic as solved by Tuesday, November the 2nd and flag it accordingly.

Thank you for your understanding,
Ferdinand

Hello @jwzegelaar,

without any further questions, we will consider this topic as solved by Tuesday, November the 2nd and flag it accordingly.

Thank you for your understanding,
Ferdinand

@ferdinand Thanks,great!

hi,

this will be fixed on the next update.

Cheers,
Manuel

Hello @ingvarai,

My old posts are likely gone, I assume.

Your old posts are not gone, but they are not linked to your account anymore, since the accounts of the old forum have not been migrated to the current forum. The old postings have been imported into the Legacy Forum category, in case of C++ questions mostly into SDK Help. So, you cannot search for all postings assigend to an account anymore, since they are attached now to the @Helper account. But when there is a certain topic you do remember, you will usually find it with some searching.

Cheers,
Ferdinand

Hi and thanks for this. It is my bad.. I didn't read the docs carefully enough / or did not understand the docs.
Now this works!
-Ingvar

Hello @ferdinand ,

this example was perfect for me, thank you very much!

(Yes, I notice that the thread has been closed, and marked as solved, and I probably shouldn't barge in, but it seems the original script error has never been addressed, so I must mansplain because that's the obnoxious guy I am.)

Two points:

The error in the script above is that the index used in SetUseNet is wrong.
The indices in the BatchRender element list begin at 0, so the first valid index is 0, and the last is GetElementCount()-1.
dBatchCount starts as GetElementCount(), which is fine as counter, but as an index, it is the first unused index.
Then this counter is increased += 1, so now it is the second unused index after the list.
When AddFile is called with that index, it simply adds the file as last element because it cannot leave empty gaps in the list. It returns True although it didn't use the desired index - it used index-1.
Now SetUseNet is called with the same index. The reason it fails is that this index is not the index that AddFile actually used. This index is not even valid. There is no element with that index. So, nothing happens.
If you use dBatchCount-1 as index at this point, or simply never increase dBatchCount in the first place, the script works fine.

The actual API error is that SetUseNet does not raise an IndexError as the docs claim.
(Other methods like GetElementStatus do.)

Okay, I go annoy someone else now.

Thanks for your prompt Reply, I was able to debug the whole thing yesterday, I don't know what to do with this post now though.

Hello @ferdinand
I've tested it a bit and now I've finished with this:

instead of this:

matrixA= c4d.utils.MatrixMove(c4d.Vector(0,10,0)) matrixB = myObject.GetMg().__mul__(matrixA)

to this:

Matrix matrix = MatrixMove(Vector(0, 10, 0)); Vector vector = myObject->GetMg() * matrix.off;

It looks it works for me.
Thank you again!