Posts made by m_adam

Hi,
yes, this is expected, and documented in NodeData::Read() / NodeData::Write() Manual. With that's said Read/Write is supposed to serialize data of your object (most of the time member variable) to the c4d file (the HyperFile), so accessing the BaseDocument is a sign of a bad design.

May I ask why do you really want to access the BaseDocument in the Read function?

Cheers,
Maxime

edit (@ferdinand): Just to be clear here, as we briefly talked about this in our morning meeting, what the docs write there is in a certain sense legacy information. When a branch, e.g., the Xbase (shader) branch of a material is being deserialized, the to be deserialized node is inserted into the branch and with that will have access to a document.

But what @m_adam wrote is of course true, the document in this context is the fruit from the forbidden tree, as the node is not yet fully deserialized and certain parts of the GeListHead::Read, GeListNode::Read, BaseList2D::Read, ..., YourPluginLayer::Read deserialization chain might pull all sorts of tricks to carry out the deserialization, including temporarily removing the node from the scene graph.

The documentation is therefore effectively still correct, as deserializing a node should never rely on the document context and accessing the document is forbidden in that context.

@LeonGao007 Welcome to the Maxon developers forum and its community, it is great to have you with us!

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About your First Question

I've reached Zbrush developers, however I doubt what you ask for is possible.
First of all exporting Zbrush scene in a background thread, this would imply you copy the full scene in memory in order to avoid any issue if the user edits the scene while your edit it. I'm not an expert at it, but I do not think that Zbrush support that at all.
Exporting current scene to a common 3D model format to a specific path, this is possible via Script however from what I understand if the export plugin, trigger a popup you are screwed as you can see here Zplugin:USD Format:Save set save location through zscript.
Finally regarding GoZ, this is a custom file format, it work by saving everything into a given folder (in the temp folder), then call an executable that will load this custom GoZ file format.

So from my perspective what you are asking for is not possible, but please wait until I confirm that with a Zbrush developers.
Cheers,
Maxime.

Hi @kbar sadly there is no way to suppress this warning, I removed the hh argument for the next version, thanks for the reminder.

Cheers,
Maxime.

Thanks @Neekoe to have shared your solution and thanks @Dunhou for helping.
When you pass LV_TREE the Draw method is not called to have it called you need to pass either LV_USERTREE or LV_USER.

Cheers,
Maxime.

Hi @chuanzhen the fact that the first time (when nothing is selected) correctly respect the COLOR_TEXT is kind of a bug for treeview containing only LV_USER.

When you are using LV_USER the DrawCell method is called and you are responsible to define the color of your text via DrawSetTextCol. But if you do not set any text color, the GeUserArea will use the previously defined color. Which is in this case COLOR_TEXT when nothing is selected. Then when you select something, the last call of this DrawSetTextCol internally done by Cinema 4D define it to "white" color so that's why all texts are white. Then when there is one column that is defined as LV_TREE it will then call DrawSetTextCol with the correct color (COLOR_TEXT or COLOR_TEXT_SELECTED) and therefor your call DrawText will use this color.

So with that's said, do not forget to manage your color in your DrawCell method something like that:

txtColorDict = canvas.GetColorRGB(c4d.COLOR_TEXT_SELECTED) if obj.IsSelected else canvas.GetColorRGB(c4d.COLOR_TEXT)
txtColorVector = c4d.Vector(txtColorDict["r"]/255.0, txtColorDict["g"]/255.0, txtColorDict["b"]/255.0)
canvas.DrawSetTextCol(txtColorVector, bgColor)
canvas.DrawText(text, xpos, ypos)

Cheers,
Maxime.

Hey @Cankar001 I frankly do not understand what you are doing and why you would need that. Since you told me previously that you do not have any UI in your plugin but you told us "Would show wrong values", so which values are you talking about?
Matrices, Vectors, float in Cinema 4D are unit less and will adapt properly according to the document unit and not the displayed unit. Display unit are more or less just noise and does not indicate anything regarding the actual size of an object. For more information about Display unit vs document unit please read How Do I Change the Units Used By Cinema 4D To Something Other Than Centimeters? .

So if you want more help then you will need to share with us some code to demonstrate the issue since we do not really understand the reasoning of why you will want to do that (not saying you do not have a valid reason for doing it, but we do not understand it). If it's private code you can send it to us at [email protected].
With that's said here is how you retrieve and set the preference:

BasePlugin* bp = FindPlugin(PREFS_UNITS, cinema::PLUGINTYPE::PREFS);
if (bp == nullptr)
	return;

/* Possible Values
PREF_UNITS_BASIC_KM						= 1,
PREF_UNITS_BASIC_M						= 2,
PREF_UNITS_BASIC_CM						= 3,
PREF_UNITS_BASIC_MM						= 4,
PREF_UNITS_BASIC_MICRO				= 5,
PREF_UNITS_BASIC_NM						=	6,
PREF_UNITS_BASIC_MILE					= 7,
PREF_UNITS_BASIC_YARD					= 8,
PREF_UNITS_BASIC_FOOT					= 9,
PREF_UNITS_BASIC_INCH					= 10,
*/

GeData unitValue;
bp->GetParameter(CreateDescID(PREF_UNITS_BASIC), unitValue, cinema::DESCFLAGS_GET::NONE);
Int32 uValue = unitValue.GetInt32();

bp->SetParameter(CreateDescID(PREF_UNITS_BASIC), PREF_UNITS_BASIC_KM, cinema::DESCFLAGS_SET::NONE);

Again there is no such event so it will be on you to have a timer that check if the value changed or not.

Cheers,
Maxime.

Hi the devs just came back and here his reply:

Hey Maxime, despite the menu itself isn't hardcoded (it's MENU M_ICON_PALETTE in c4d_m_coffee_manager.res file), there's no way by default for a python script to get the command id of the right clicked command in order to do the required queries, that would require changes in C4D code.

And so far it is not a priority for us to have such feature so, we keep the idea in case we want to revisit our menus but such feature is not on any roadmap at the moment.
Cheers,
Maxime.

Hi what you describe (Edit > Program Settings > Units > Display) is only the display of the unit in the whole Cinema 4D interface. Not the actual unit of the document which can be found by pressing CTRL+D -> Project -> Scale and which is actually changed by the code you provided.

So do you really want to change/listen to the Display unit and not the actual unit?

Cheers,
Maxime.

Hi @Cankar001 there is no such message, so you have to track it yourself.
The best way would be to use a MessageData MessageData to either
create a timer that will periodically (maybe each second) check the value stored in the document or react to EVMSG_CHANGE and also check the value stored in the document.

Cheers,
Maxime.

Hi @Cankar001 you do not have to do anything as long as you define your parameter as a unit then it will respect the one in Cinema 4D and automatically adapt.

If your plugin is a GeDialog, then you need to call SetMeter and if you are working with description you need to set DESC_UNIT to DESC_UNIT_METER. While the symbol indicate meter, they will respect the settings defined in the document and adapt accordingly.

If you do not want to use the default system, then you will have to do everything yourself, and track yourself the change. But here it depend too much on the type of your plugin to guide you, so please tell us a bit more about it, and most important what is your UI.

Cheers,
Maxime.

Hi @serco, there is multiple way to execute a script automatically when Cinema 4D is opened.

1. Use python_init.py, this force you to add your script into the temp folder. Bu it can be done for a particular instance of a Cinema 4D or it can also be applied to all Cinema 4D versions that use a given python version.
2. Implement a Plugin and react to PluginMessage various event are sent to Python, and you can hook into them to execute your code. This require to have a Python plugin loaded by Cinema 4D.
3. Depending of your needs there is c4dpy which act as a Python Interpreter, where you can pass directly your Python file as an argument. Then again depending of your need you may be able to start what you want to do next.

Cheers,
Maxime.

Hi I've forwarded to the responsible developers, since it's Christmas and new year period, it may take some time until I come back to this topic (most likely only next week).

Cheers,
Maxime.

Thanks a lot for reporting this kind of issue !
This is going to be fixed in the next update of the doc.

Cheers,
Maxime.

Hi please open new topic for any new question that is not directly related to your initial question.

If I understand correctly you want to toggle the Coordinate state, if that's the correct you can either use CallCommand(12156) # Coordinate System. You can find this number by opening the Script Log and if you click on the Coordinate System it will give you the Id. However CallCommand have the issue that it automatically add an Undo step, which can be an issue in some case.

So the proper way would be to call:

bool enableWorld = true;
doc->SetParameter(CreateDescID(DOCUMENT_STATEW), enableWorld , DESCFLAGS_SET::NONE);

How I found this, looking at the code internally, sadly it is no documented anywhere...
If you have any other questions related to this topic, reply to this topic and I will move it to a new topic.

Cheers,
Maxime.

Hi @BretBays Happy Christmas ! Thanks for getting back, and indeed PLUGINFLAG_COMMAND_OPTION_DIALOG is the way to go. Find an example in CommandData with Options Dialog - Docked command button

Cheers,
Maxime.

Hi using MessageData is correct, however the best way is to call ExecuteOnMainThread as you can see in the websocket example I share with you here.

This lambda will be executed on main thread, therefor it will be safe to create object and perform undo from it. One note make sure to pass a copy of the data to your lambda, since this lambda will be executed when the main thread is free and you do not know exactly when it can happen. And it can be latter than your OnMessage function, so with a copy you are sure that object are not nullptr.

Cheers,
Maxime.

Hi the C++ one is the most up to date version, thanks for pointing it.

The Python doc will be updated.
Cheers,
Maxime.

Hi I do not have access to PostMan so it's hard to reproduce. Would be nice if you can provide a Python/C++/Javascript code that act as a client. So take my answers with a grain of salt.
In my example I used a VsCode plugin (so a NodeJS instance), you can have a look at the client implementation
Cinema-4D-Visual-Studio-Code-Extension .

With that's said looking at the error I would say your request header should contain the protocol in the Sec-WebSocket-Protocol fields which should match the one you defined in mWebSocketServer.StartWebServer(addr, false, "<tried different values here but no change>"_s) iferr_return;.
While Sec-WebSocket-Protocol is normally not a mandatory field, in our implementation it is mandatory to provide one.

Cheers,
Maxime.

Hi @Cankar001 we do not really have any official example for the Websocket, but fortunately I did make the Visual Studio Code Bridge project, which have the duty to exchange code from VSCode to Cinema via Websocket, and it's open source. So it is not nicely documented and explained as an example could be but it can serve you as a base.
So find this example in Cinema-4D-Legacy-Visual-Studio-Code-Bridge-Plugin and look at the websocket_json_codeexchange.h and cpp.

The main entry point is in WebSocketJsonCodeExchangeImpl::Start where all the observable are properly feed.

Three special notes:

• The code was written for S26 and is now directly merged into Cinema 4D, so it is not up to date, so for the observable the new way is to call it like that:

g_wsServer.ObservableHandshake(true).AddObserver(OnHandShake) iferr_return;
g_wsServer.ObservableConnected(true).AddObserver(OnConnected) iferr_return;
g_wsServer.ObservableDisconnected(true).AddObserver(OnDisconnected) iferr_return;
g_wsServer.ObservableMessage(true).AddObserver(OnMessage) iferr_return;

• ObservableHandshake observable always need to be defined otherwise you won't be able to connect. Even if it's empty (like mine in OnHandShake).
• You need to close all connections before calling StopWebServer otherwise it will wait forever. This means you needs to keep tracks of all theses connections somehow. In my case I do it by storing connections in a BaseArray during the OnConnect within the WebSocketJsonCodeExchangeImpl which is as a Singleton (so only one instance of it exist).

Regarding your question it does not compile because you are calling it wrongly if I may say. First you pass a nullptr argument at the end that is not needed and secondly you do not handle the error that AddObserver emit which is probably the cause of the non-compilation. I would advice you to read Maxon API - Error Handling. With that's said here the adapted version that compile:

g_wsServer.ObservableConnected(true).AddObserver(
	[](const maxon::NetworkWebSocketConnectionRef& webSocket, const maxon::DataDictionary& request) -> maxon::Result<void>
	{
		iferr_scope;
		return maxon::OK;
	}) iferr_return;

If you need more help and there is detail you have hard time to understand in the code example do not hesitate to ask questions.
Cheers,
Maxime.

Hey @chakuew0 this question is out of scope of this forum which is solely about the Cinema 4D API. So we will let the community answers.

For any question related to the pure usage of Cinema 4D without any scripting please reach the Maxon Support.

Cheers,
Maxime.