Posts made by i_mazlov

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

Hi @rui_mac,

As long as it fits your needs there's nothing to add against using BaseContainers in your case. However, if you don't need to store hierarchical data, the simpler approach of using BaseArray can sometimes end up in a cleaner implementation.

You can use the generic Data type to handle values of different types.

Cheers,
Ilia

Hi @Gemini,

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

There's no built-in token for this, so you would need to manually parse the document file path for the necessary information (e.g. using regular expressions) and adjust the render settings correspondingly.

Depending on the desired behavior you'd like to achieve, the implementation can be slightly different.

If you'd like to create custom token, which contains your extracted information, please check the posting from Dunhou (thanks for taking an active role in the community!).

In case you'd like to have a script that asjusts the filepath, please have a look at the render settings example. For the "File" field you'd need to use c4d.RDATA_PATH token.

Cheers,
Ilia

Hi @BigRoy,

For the alembic camera, you can use c4d.MSG_GETREALCAMERADATA, for example:

def main():
    data = dict()
    op.Message(c4d.MSG_GETREALCAMERADATA, data)
    print(data['res'])

Another option (which would work for other object types as well) would be to check type of the object's cache using GetCache().

Cheers,
Ilia

Hi @BigRoy,

Loading alembic file through the import process is not different from any other exchange format supported in cinema. Please, have a look at the OBJ Example here. You can also find corresponding symbols for the alembic import settings in our docs: Alembic Import Settings. After setting everything up you can either merge entire abc file directly to your document using MergeDocument() or load it into a separate document using LoadDocument().

There's no special Alembic API. The Alembic generator is accessible in a regular way via getting and setting parameters (GetParameter() and SetParameter()). You can find the list of available alembic parameters here: Alembic. For example, by using the c4d.ALEMBIC_PATH (or/and c4d.ALEMBIC_IDENT_STATE) parameter you can change the path to the alembic file or may be remove the object of the designated filepath doesn't exist anymore.

However, managing internal alembic data is very tricky, as there's no easy way to do it. You can access geometry data by accessing geometry cache (please check my posting on the neighbor thread: How to get the number of points in an object?) or by baking alembic using MCOMMAND_CURRENTSTATETOOBJECT command in the SendModelingCommand() function. However, the animation data is not accessible other than by scrabbing the timeline and accessing the geometry at each frame. Please also have a look at related threads: Change alembic generator state/type and How to preserve the animation of a sphere. There's no default approach here and it would highly depend on your specific scanario.

The enabled state of the streaming attributes is handled dynamically and depends on the data you have in your alembic file. Namely, if the visibility option is grayed out, it means either that the visibility track is not animated in the alembic file (check your scene file or alembic exporter settings, if you use C4D to create those) or you haven't enabled visibility option in the alembic import settings. For such questions you can consult our User Documentation or reach out to our Support Center.

Cheers,
Ilia

Hi @datamilch,

you can use the EVMSG_CHANGE message as a trigger to check your objects for changes. The timer approach might seem imprecise from the first glance, but can actually be used, I don't think there're any significant reasons against it. Additionally, the recent change was made to make BaseList2D being hashable. This effectively means you can operate with your objects in a dict.

The python tag approach is the least efficient, although would still work, yes.

You're saying your GeDialog plugin uses "mostly the ideantical userdata". If it was "identical", you could potentially use c4d.gui.DescriptionCustomGui with the SetObject function to make it point to your object. This way you can avoid hassling around all the data sync, because it is all handled as a built-in functionality of this class. This is how the attribute manager effectively works, or the Active Object Dialog as well.

For your further postings please follow our guidelines on How to Ask Questions, namely:

Please consolidate your questions into a singular posting by editing your last posting

Cheers,
Ilia

Hi @rui_mac ,

you can distinguish between different types of the BaseObject* op using GetType() function, this part is correct in your code.

If op->GetType() == Opolygon gives you true, it means that your op is actually a polygon object, so you can easily cast it to PolygonObject* using one of the following approaches:

1. static_cast<PolygonObject*>(op)
2. ToPoly(op), which is just an alias for the 1.

Since PolygonObject is inherited from the PointObject, the same stands for PointObject class too:

1. static_cast<PointObject*>(op)
2. ToPoint(op), just an alias for the 1.

In case your op is effectively Oplane (or any other object that's not a raw polygon), you're not able to easily access its points, because sometimes there's an entire hierarchy hidden behind the op. In this case you'd need to bake your object to a single polygon object. There're actually two ways you can follow from this point:

1. The naive and very expensive one. You can use the SendModelingCommand to execute "Current State to Object" command on your object. This is slow and inefficient, but is a low hanging fruit, since these couple of lines would cover all the edge cases.
2. Access objects geometry cache yourself. By this I mean using GetCache() and GetDeformCache() functions. This approach requires proper coding, since you can have interesting structures there and easily hit some edge cases. However, it will be way faster and more efficient, comparing to 1., especially if you expect it to work with simple objects like Oplane.

Both approaches have been already extensively discussed on the forum, so you shouldn't have problems searching for example code snippet. Additionally, we have great examples (although using Python API, which in this case will be very similar to C++ API) for both scenarios:
SendModelingCommand: Current State to Object
Geometry Caches

Cheers,
Ilia