Posts made by i_mazlov

Hi @heytraile,

Please have a look at our Support Procedures: How to Ask Question section. Usually it is very helpful if one provides a relevant code snippet, demonstrating the issue. This helps to reduce the room for any misinterpretations of your original question.

Regarding the issue you're describing, the "null" being logged to the console is often a symptom of an implementation issue within a function that overrides the base implementation. Specifically, if a function (such as Message() or RestoreLayout()) is expected to return a particular type (e.g., bool), but instead returns None or a mismatched type, it can result in unexpected behavior and the "null" log.

Cheers,
Ilia

Hi @Vladislav-Borovikov,

Welcome to the Maxon developers forum and its community, it is great to have you with us!

Getting Started

Before creating your next postings, we would recommend making yourself accustomed with our forum and support procedures. You did not do anything wrong, we point all new users to these rules.

• Forum Overview: Provides a broad overview of the fundamental structure and rules of this forum, such as the purpose of the different sub-forums or the fact that we will ban users who engage in hate speech or harassment.
• Support Procedures: Provides a more in detail overview of how we provide technical support for APIs here. This topic will tell you how to ask good questions and limits of our technical support.
• Forum Features: Provides an overview of the technical features of this forum, such as Markdown markup or file uploads.

It is strongly recommended to read the first two topics carefully, especially the section Support Procedures: Asking Questions.

About your First Question

Custom datatypes implement copy constructor, which effectively means that at the line

gradient = ramp_node[c4d.REDSHIFT_SHADER_RSRAMP_RAMP]

you copy c4d.Gradient from the node and store it in variable 'gradient'. All further interactions are performed with this local copy of the gradient. In order to apply them back to the node you need to assign your local variable after modifications back to the node:

ramp_node[c4d.REDSHIFT_SHADER_RSRAMP_RAMP] = gradient

Cheers,
Ilia

Hi @RyanTheDev,

Welcome to the Maxon developers forum and its community, it is great to have you with us!

Getting Started

Before creating your next postings, we would recommend making yourself accustomed with our forum and support procedures. You did not do anything wrong, we point all new users to these rules.

• Forum Overview: Provides a broad overview of the fundamental structure and rules of this forum, such as the purpose of the different sub-forums or the fact that we will ban users who engage in hate speech or harassment.
• Support Procedures: Provides a more in detail overview of how we provide technical support for APIs here. This topic will tell you how to ask good questions and limits of our technical support.
• Forum Features: Provides an overview of the technical features of this forum, such as Markdown markup or file uploads.

It is strongly recommended to read the first two topics carefully, especially the section Support Procedures: Asking Questions.

About your First Question

Please elaborate on your question, there's no good reference or solution you can get without providing the context. What is a "custom file type"? do you mean you've implemented BaseSceneLoader plugin? When you try to open dialog? Is it happening on main thread? What's the code that does this? What does it mean "keeps failing" - does it give you error instead?

You can also have a look at SCENEFILTER::DIALOGSALLOWED flag, if it's applicable in your case.

Cheers,
Ilia

Hi @baca,

The expected workflow to achieve syntax highlighting in VSCode is using our C4D Connector Extension for VSCode. Please note, for syntax highlighting to work your VSCode need to be opened within some workspace (e.g. when you do "Open folder" in VSCode).

The approach from the c4dpy manual should still be working and the error you're sharing looks like command

"/Applications/Maxon Cinema 4D 2025/c4dpy.app/Contents/MacOS/c4dpy" -I

did not make an output that's expected by the VSCode. Please use the extension approach instead.

Cheers,
Ilia

Hi @Gemini,

please excuse the delayed answer.

It's hard to understand what exactly you're asking about.

If you want to create custom menu, please check the following threads:
Building menus with C4DPL_BUILDMENU in S26+
How to add "scripts" to a menu?

If your question is anyhow related to loading plugins from custom location, please check the g_additionalModulePath argument. Related discussion was in the following thread:
how to program plugins with python?

Otherwise, please give a more detailed description of what specifically you're trying to achieve.

Cheers,
Ilia

Hi @llealloo,

please excuse the delayed answers.

To the best of my knowledge in the near future there're no plans for integrating usd python bindings into c4d python system.

By the way, with the 2025.0 release internal usd library was properly updated to OpenUSD 24.08, so we expect the double loading usd issue to be solved under OSX.

Cheers,
Ilia

Hi @ThomasB,

Please note that R21 is generally out of scope of full support on this forum. I've tried your code with the oldest C4D version I have (which is R25) and I cannot reproduce your issue.

However, looking in your code it seems like you might need an additional handling for the case when the texture view is not open, please have a look at the comment in our example: call_uv_command_r18.py .

You can also find some useful information on a similar thread, where Ferdinand gave some insights about GetActiveUVSet function: GetActiveUVSet() returns None if multiple UVs are active?.

Cheers,
Ilia

Hi @brian-michael,

I've forked your posting in a dedicated thread. For your following postings please stick to our guidelines, which you can find in the Support Procedures, namely:

Singular Subject: From all this follows that a topic must have a singular and sparse subject tied to a specific problem

especially when it comes to N-years-old threads

Regarding your question, please share more context on what specifically you're trying to do, because depending on that you can end up in a completely different ways of approaching your goal.

For example, if you'd like to bake animation in a "read-only manner" (just take the object transformations and store/send them somewhere), then the suggested approach would be to clone document and process it in a separate C4DThread. You can check Ferdinand's code example on the exact same topic in application to rendering document: RenderDocument/PythonCallBack : how to display progress prints during the render. However, with such approach you're limited to not being able to modify original document (because you'd use the cloned document instead of the active one).

Cheers,
Ilia

Hi @kng_ito ,

Please excuse the delayed answer.

According to our codebase the Execute() function will return GV_CALC_ERR_CALCULATION_FAILED for the calculation errors happening on master or global scope, namely when the GvNodeMaster was not able to calculate successfully (i.e. GvCalcState higher than GV_CALC_STATE_LOCAL_FAILURE). Issues like zero division only cause local failure, hence are not returned as error in Execute() function. Unfortunately, there's not much you can effectively do here.

In our SDK support meeting Ferdinand suggested an approach of adding intermediate xpresso python node, where you can detect and handle issues yourself. However, this highly depends on your use-case scenario, because if you for example need to batch-process xpresso graphs, this won't be any practical.

Cheers,
Ilia

Hi Daniel,

Please excuse the delayed answer.

You're not supposed to create tags via constructor. It's expected to be created using MakeVariableTag() function instead. Please have a look at Ferdinand's example here: Negative Vertex Map values

Cheers,
Ilia

Hi @PMenich ,

We insistently ask you to create a separate thread with a dedicated title name, code example and specific question or issue description, if your topic diverges from the original one, especially if the original one is two years old. You're welcome to refer this thread, e.g. by posting a link.

Please also pay extra attention to the following parts of our Support Procedures:

We cannot provide support for the side-effects of unexperienced users using AI models to write code.

We provide code examples but we do not provide full solutions or design applications.

We cannot debug your code for you and instead provide answers to specific problems.

Additionally we kindly ask you to consolidate your sequential messages in a single posting for better readability and human perception.

Cheers,
Ilia

@edit @ferdinand: Removed new user note as @PMenich is not a new user.

Hi @kng_ito,

Please excuse the delay. You posting is not forgotten and will be processed asap. Unfortunately I'm currently under deadlines pressure and cannot provide fast support.

Cheers,
Ilia

Hi @ops,

There's no built-in function, which does this for you, so you'd need to implement this on your own. Namely, you'd need to iterate through the object's children and adjust their transforms to the inverse change of the parents transform. Please check the code example below.

There're two important things to mention:

1. The SetMl() function won't make any effect if the object has "Protection tag" (or other restricting means, e.g. "Constraint" tag etc). This will behave basically the same as if you were to use "7" shortcut. If you actually want to work around this, you'd need to disable the restriction before using SetMl() yourself.
2. Generally speaking the GetMg()/SetMg() functions are inefficient to use (because it's value is calculated from the chain of local transformation matrices Ml). This is unlikely to be noticeable in python, because python api is pretty slow by itself. However, if you were to use Mg in C++ API (especially in some tight place like e.g. GetVirtualObjects()), it could negatively affect the performance. Hence, it's highly recommended to use GetMl()/SetMl() instead, if possible.

Cheers,
Ilia

The code example:

import c4d
op: c4d.BaseObject | None  # The primary selected object in `doc`. Can be `None`.

def SomehowMoveObject(obj: c4d.BaseObject) -> None:
    obj.SetAbsPos(obj.GetAbsPos() + c4d.Vector(100, 0, 0))

def main() -> None:
    opMlOriginal: c4d.Matrix = op.GetMl()  # Keep the original matrix before moving the object
    SomehowMoveObject(op)  # Somehow transform the parent object

    opMChangeInv: c4d.Matrix = opMlOriginal * ~op.GetMl()  # Calculate the inverse matrix for the children
    for child in op.GetChildren():
        child.SetMl(child.GetMl() * opMChangeInv)  # Apply the inverse transform to the children

if __name__ == '__main__':
    main()
    c4d.EventAdd()

Hi @tx3008,

Welcome to the Maxon developers forum and its community, it is great to have you with us!

Getting Started

Before creating your next postings, we would recommend making yourself accustomed with our forum and support procedures. You did not do anything wrong, we point all new users to these rules.

• Forum Overview: Provides a broad overview of the fundamental structure and rules of this forum, such as the purpose of the different sub-forums or the fact that we will ban users who engage in hate speech or harassment.
• Support Procedures: Provides a more in detail overview of how we provide technical support for APIs here. This topic will tell you how to ask good questions and limits of our technical support.
• Forum Features: Provides an overview of the technical features of this forum, such as Markdown markup or file uploads.

It is strongly recommended to read the first two topics carefully, especially the section Support Procedures: Asking Questions.

About your First Question

Third party software is out of scope of our Support Procedures, namely:

We cannot provide support for third party libraries.

Hence I've moved your thread to the "General Talk" forum.

Many thanks to @Dunhou for taking an active role of our community! Much appreciated!

Cheers,
Ilia

Hi @jasonwalker,

Welcome to the Maxon developers forum and its community, it is great to have you with us!

Getting Started

Before creating your next postings, we would recommend making yourself accustomed with our forum and support procedures. You did not do anything wrong, we point all new users to these rules.

• Forum Overview: Provides a broad overview of the fundamental structure and rules of this forum, such as the purpose of the different sub-forums or the fact that we will ban users who engage in hate speech or harassment.
• Support Procedures: Provides a more in detail overview of how we provide technical support for APIs here. This topic will tell you how to ask good questions and limits of our technical support.
• Forum Features: Provides an overview of the technical features of this forum, such as Markdown markup or file uploads.

It is strongly recommended to read the first two topics carefully, especially the section Support Procedures: Asking Questions.

About your First Question

Please note that this developers forum is for the public APIs of Maxon products related topics. We unfortunately cannot help with the end user issues. Please ask your end user questions in our Support Center. This and also other important considerations are mentioned in the Scope of Support part of our Support Procedures.

If your question is actually development-related (as you've attached "Programming" tag to your posting), then please elaborate on your question from the technical point of view, namely, what specifically are you trying to achieve and by what means?

Cheers,
Ilia

Hi @Osher-0 ,

Welcome to the Maxon developers forum and its community, it is great to have you with us!

Getting Started

Before creating your next postings, we would recommend making yourself accustomed with our forum and support procedures. You did not do anything wrong, we point all new users to these rules.

• Forum Overview: Provides a broad overview of the fundamental structure and rules of this forum, such as the purpose of the different sub-forums or the fact that we will ban users who engage in hate speech or harassment.
• Support Procedures: Provides a more in detail overview of how we provide technical support for APIs here. This topic will tell you how to ask good questions and limits of our technical support.
• Forum Features: Provides an overview of the technical features of this forum, such as Markdown markup or file uploads.

It is strongly recommended to read the first two topics carefully, especially the section Support Procedures: Asking Questions.

About your First Question

Please note that this developers forum is for the public APIs of Maxon products related topics. We unfortunately cannot help with the end user issues. Please ask your end user questions in our Support Center. This and also other important considerations are mentioned in the Scope of Support part of our Support Procedures.

Cheers,
Ilia

Hi @ops,

Thanks for reaching out to us and thanks for sharing your solution with the community, this is highly appreciated!

You're right, the most common way of accessing object's attributes is by using subscript operator.

Cheers,
Ilia

Hi @rui_mac,

Could you please provide a little more context and code, how specifically you run into this issue? How exactly do you check that your baked RGB image has no alpha available? I know there were some issues in Picture Viewer showing alpha channel (which could be the case that your image does have alpha but you cannot see it in the PV).

In general the doAlpha flag should do its job, so if it doesn't - it's likely a bug. Unfortunately, I will be able to check this earliest next week.

Cheers,
Ilia

Hi @rui_mac,

from your explanation it seems you're misunderstanding how the unique IP is supposed to function in cinema. Namely, with the SetUniqueIP() function one should assign a unique identification number to an object of a generator, which creates a hierarchy (i.e. more than one object). One's also supposed to use OBJECT_UNIQUEENUMERATION bit in such case. Inside Output you get polygonized representation of your scene (you can think of it as there's no concept of generator anymore), hence you're just lucky that you're getting back your unique IP there, or in other words you're not supposed to get it there.

I suspect what you're trying to achieve is to assign some custom data in InitRender and later access it in the Output. If that's the case, you can implement a tag and assign your data to this tag. This would allow you to access this tag in the Output function, because your tag will be carried over during the "baking" process.

For more info on tags please check the BaseTag and VariableTag Manual.

Cheers,
Ilia

Hi @BigRoy,

in python the lifetime of the objects is handled automatically so you're right, there's no need to do anything special to destruct the object.

Good job on your project! Thanks for sharing it with the community!

Cheers,
Ilia