Thanks for your explaination @ferdinand Now I understand what's going on here. Cheers!

Hey @moghurt, Thank you for reaching out to us. I tried using the pyp plugin to execute Python scripts when starting the software to modify the project file, but when I use the '-render' parameter, the Python code in the pyp plugin is executed after the rendering is complete. I can only speculate as to what exactly you have been doing here, as you do not provide any details or code. Please have a look at Support Procedures: Asking Questions for how to ask good technical questions. The general workflow for what you want to do here (given that one really wants to follow the plugin route) would be to implement PluginMessage for your plugin, and then try to run your code from there at a fitting point of time in the startup sequence of Cinema 4D. And while I would not rule out that -render has an impact on the startup sequence of Cinema 4D, the general claim that your Python code only runs after the rendering seems a bit far fetched. Because for events such as C4DPL_INIT_SYS and C4DPL_INIT modules and plugins have not been loaded yet, i.e., rendering is literally impossible at these points. The plugin approach also assumes that you can inject without problems alien command line arguments into a Cinema 4D app call, e.g., \CINEMA 4D.exe"-nogui -render "render.c4d" -script "myscript.py" with -script being the alien argument. I am not quite sure that this would work, I would have to try myself. What also is problematic, is that you are likely not able to get hold of the render document on this route. The active document will be the empty document, not the render document, i.e., you cannot get hold of the BaseDocument for render.c4d. And you cannot just open and modify the document yourself, as Cinema might have already a lock on that file or is even already loading it. All this makes using c4dpy instead much more attractive as you won't have these problems there. It is also the intended solution for what you want to do here: Modify one or many documents without a GUI in a fire and forget manner. A while ago we had the topic Extending the Command Line with Python where I showed a workflow for how to treat c4dpy as a Script Manager environment. The thread is four years old, written in Python 2 syntax (you will have to convert to Python 3 syntax), and I was then not yet a Maxon employee but a student. So, you might run into some issues. But the principle is definitively reproduceable and I also do not see anything in my old code which seems like a really bad idea. Your workflow could then look like this for doing the pre and post rendering events (as a bat, ps1, sh, or command file and assuming that you do not want to overwrite files): c4dpy script_manager_environment.py -script my_script.py -in my_doc.c4d -out my_doc_pre.c4d CommandLine -my_doc_pre.c4d ... c4dpy script_manager_environment.py -script my_script.py -in my_doc_pre.c4d -out my_doc_post.c4d Cheers, Ferdinand

Please open a new topic for new subjects. See our Support Procedures: Asking Questions. GetBit is a BaseList2D method, your node is not a BaseList2D.

@m_adam Thank you for providing an alternative method to set parameters.

Thank you so much! That was it. I was thinking I would try to create this standalone, before moving it into creating a GUI, and I didn't know about the Timer in GeDialog. This is now working, and all I needed to do is remove the multithreading and change it to the timer.

Hi @pyxelrigger , Unfortunately your question is out of the scope of support on this forum, namely: We cannot provide support on learning C++, Python, or one of their popular third-party libraries. With that's said, I'm kind of missing the main idea behind your question, in other words what are you trying to achieve? Is it just another (e.g. simply more convenient) data structure for the hierarchy? If so, then you're free to create whatever data structure fits your need the best. For example, check a very fast draft code snippet below. Is it that you want to track changes of the hierarchy? If so, then you might need to come up with some more complex setup, e.g. involving using the c4d.EVMSG_CHANGE message. Please, refer to a great Ferdinand's answer here: Best way to detect an object has been deleted? Please also consider visiting our How to ask Questions section of the support procedures for your future postings. Cheers, Ilia A super draft example of nested lists hierarchy representation: import c4d doc: c4d.documents.BaseDocument class HierarchyObject: def __init__(self, op): self.op = op self.children = [] child = self.op.GetDown() if op else doc.GetFirstObject() # recursion entry point while child: self.addChild(HierarchyObject(child)) # recursion child = child.GetNext() def addChild(self, child): self.children.append(child) def toString(self, indentation: int = 0): indentStr: str = '\t' * indentation name: str = self.op.GetName() if self.op else '___root___' s: str = f'{indentStr}<{name}' if self.children: s += ':' for child in self.children: s += f'\n{child.toString(indentation + 1)}' s += f'\n{indentStr}' s += '>' return s def __str__(self): return self.toString() if __name__=='__main__': root: HierarchyObject = HierarchyObject(None) print(root)

Yes, I know about not using multiple events. I was playing with that, I thought that's the reason the button was not being called Thank you @ferdinand

Thank you @m_adam It seems that the best approach is to manually create a null object and calculate its correct rotation matrix through certain methods to achieve the same effect. Once again, thank you for your code; it has been very useful to me!

No need to be sorry, a good to hear that you found your solution!

hey, found the error. works exactly as i had planned. my code was correct, but i forgot to switch off use fields on the new vertex i mapped. thanks for the help anyway! [image: 1717679020556-4761c896-9141-42d3-8872-df429c5441df-grafik.png]

Hey @ferdinand , Thanks for your answer, unfortunately, the answer is the same as I thought, and I am powerless to do anything about it. I can only wait for the exposed parameters. Based on your suggestion, there may be many issues, and it is not worth spending a lot of time debugging them. Fortunately, this is not a very urgent task. Cheers~ DunHou

Thanks for your explanation @m_adam , Yes it's a CommandData plguin but no GeDialog. Because of some limitations, I had to use PySide to create my plugin's special user interface.

Hey everyone, just to add a little disclaimer here, as Maxime gave a very hacking friendly answer with the a bit tame warning 'do it at your own risk'. What you are tyring to do is out of scope of support because it is a violation of the threading restrictions. The whole core message system is about events and UI, both things that are inherently bound to the main thread. Maxime's code just circumvents the main-thread check someone once put into our code for a reason, as that person also made sure to put a warning into the docs. When you are someone like Maxime, i.e., you know all the bits and bytes of Cinema 4D on a first-name basis, you can make a workaround like this work. But for everyone else I would strongly recommend not circumventing such things in production code. Just because a hack runs fine on a development machine, does not mean that a customer might not lose work due to a crash induced by such hack. The underlying issue we talked about this morning, is that in C++ one can easily defer things to the main thread with the aptly named ExecuteOnMaainThread while in Python one cannot. We are aware of this issue but it is quite costly to solve. An outcome of this thread, was that we at least promoted the priority of the already existing ticket for this issue in our task pool. We can however give no ETA when we will fix this, as doing this will cost quite some time. Cheers, Ferdinand

@ferdinand Thanks a lot Ferdinand for your time and effort. It is always admirable how carefully and thoroughly you answer many questions. At first it was often difficult to understand and follow your code examples...now it is a little easier. Thanks for that. I found out that the following method also does the job: c4d.SendCoreMessage(c4d.COREMSG_CINEMA, c4d.BaseContainer(c4d.COREMSG_CINEMA_FORCE_AM_UPDATE), 0) Sorry for the second question about why this buttonDesc[c4d.DESC_FITH] = True buttonDesc[c4d.DESC_SCALEH] = True in the GetDDescription method are not working. I thought this is a follow-up question. I will open another topic for that.

Hi @ferdinand, Thanks for your reply. I just want to make sure if it's possible. And I'll try the BaseDraw.DrawObject later.

Hey @InterfaceGuy, you did nothing wrong here, that was an understandable mistake and we do not mind moving topics from time to time. But at the same time we still have to uphold our rules. Cheers, Ferdinand

Ok thanks. Will do that!

Hello @FlavioDiniz, thank you for reaching out to us. No, that was not fixed in 2024.4. The current plan is to fix it an upcoming minor release, but as always we cannot give any guarantees regarding an ETA. There are currently no workarounds for the other issue. Cheers, Ferdinand