Thanks for the response. Yes I am trying to get the MoData from the MoDataTag on a MoGraph generator object, and I am utilizing a Virtual document that has not added to the list of documents. Sorry for using the incorrect terminology, I am trying to get the MODATA_MATRIX. This is the code that I am using. BaseObject *matrixObj = BaseObject::Alloc(1018545); // Matrix Object if (matrixObj == nullptr) return nullptr; BaseObject *boolebj = op->GetDown(); // I know for a fact that this is a Boole object if (boolebj == nullptr) return nullptr; BaseDocument *virtualDoc = BaseDocument::Alloc(); BaseObject *clonedBooleObj = (BaseObject*)boolebj->GetClone(COPYFLAGS::NONE, nullptr); if (clonedBooleObj == nullptr) return nullptr; virtualDoc->InsertObject(clonedBooleObj, nullptr, nullptr); virtualDoc->InsertObject(matrixObj, nullptr, nullptr); BaseContainer *matrixData = matrixObj->GetDataInstance(); matrixData->SetInt32(ID_MG_MOTIONGENERATOR_MODE, 0); // Setting to Object Mode matrixData->SetLink(MG_OBJECT_LINK, clonedBooleObj); matrixData->SetInt32(MG_POLY_MODE_, 0); // Set to Surface Distribution Mode matrixData->SetInt32(MG_POLYSURFACE_SEED, 1234567); matrixData->SetInt32(MG_POLYSURFACE_COUNT, 20); matrixData->SetBool(MG_OBJECT_ALIGN, FALSE); matrixData->SetVector(ID_MG_TRANSFORM_SCALE, Vector(0)); virtualDoc->ExecutePasses(nullptr, true, true, true, BUILDFLAGS::NONE); if (virtualDoc->GetFirstObject() != nullptr) { BaseTag *tmp = matrixObj->GetTag(ID_MOTAGDATA); // This tag is not found inside of the Virtual document if (!tmp) return nullptr; GetMoDataMessage modataMsg; if (!tmp->Message(MSG_GET_MODATA, &modataMsg)) return nullptr; MoData *matrixData = modataMsg.modata; if (!matrixData) return nullptr; Int32 matrixItemsCnt = matrixData->GetCount(); MDArray<Matrix> mdmat = modataMsg.modata->GetMatrixArray(MODATA_MATRIX); Matrix* itemsMtxArray = static_cast<Matrix*>(matrixData->GetArray(MODATA_MATRIX)); maxon::Int32* flags = static_cast<maxon::Int32*>(matrixData->GetArray(MODATA_FLAGS)); for (Int32 index2 = 0; index2 < matrixItemsCnt; index2++) { if (flags[index2] & MOGENFLAG_CLONE_ON == MOGENFLAG_CLONE_ON) { } } } This code has worked as expected with most objects but not with a Boole object. John Thomas

Hello, you find information how to run a plugin from within Visual Studio in the documentation: Development for Microsoft Windows - Running Plugins. best wishes, Sebastian

@dada I would not recommend using the C++ SDK for a C++ novice. The Python SDK is much easier to get something done quickly and get used to the API.

Thank you so much, all The Cinema 4D on the other computer was not updated to R19.068, I updated the c4d app and I made new test, it seem to work normally. To be sure, I will retest it again on a third computer. I have an error when I try to debugging plugins, I will create new topic concerning this error. Thanks again, and have a great day.

As a side note, that yesterday I forget to mention in the rush on answering back, please be aware that Cinema 4D R21 executables are not differentiated anymore as it was in the past between demo and non-demo versions. The binaries are exactly the same and are those stored on the Maxon website and the sole difference is the license used by Cinema. The trial license is actually just a regular license but time-limited. Best, R

Hi @neon sorry for the delay, unfortunately, Cinema 4D is not designed this way. If you think about it, there is no tag that works by hierarchy inheritance except the selection tag. Which work by naming a selection. So it's a very special case. The main issue is Cinema 4D will, in any case, reset the data you define in the vertex map to the number of polygons. (and in this case, 0 since it's a generator). So here a workaround, but it's very experimental and can be buggy. So please don't use it in production as he does some really cross-thread things that are not allowed and that could crash Cinema 4D. But at least it can give you some ideas. pc_11963.c4d And the python code of the python generator. import c4d def Bl2DIterator(obj): """ Iterates over any BaseList2D list """ while obj: yield obj for opChild in Bl2DIterator(obj.GetDown()): yield opChild obj = obj.GetNext() def FindAllVetexShaderFromObj(obj, targetVertexMap): """ Retrieve from each material assigned to `obj` all vertexMap shader where `targetVertexMap` is used. """ allVertexShader = [] for tag in obj.GetTags(): if not tag.IsInstanceOf(c4d.Ttexture): continue mat = tag[c4d.TEXTURETAG_MATERIAL] if mat is None: continue for shader in Bl2DIterator(mat.GetFirstShader()): if shader.IsInstanceOf(c4d.Xvertexmap): vMap = shader[c4d.SLA_DIRTY_VMAP_OBJECT] if vMap is not None and vMap == targetVertexMap: allVertexShader.append(shader) return allVertexShader def main(): # Retrieve a copy of linked obj polygonObj = op[c4d.ID_USERDATA,1] if not isinstance(polygonObj, c4d.PolygonObject): return polygonObj = polygonObj.GetClone() polygonObj.SetMl(op.GetMg()) # Retrieve vertex map from the copied object vMap = polygonObj.GetTag(c4d.Tvertexmap) if vMap is None: return # Subdivide the opbject bc = c4d.BaseContainer() bc[c4d.MDATA_SUBDIVIDE_SUB] = 1 res = c4d.utils.SendModelingCommand( command=c4d.MCOMMAND_SUBDIVIDE, list=[polygonObj], mode=c4d.MODELINGCOMMANDMODE_POLYGONSELECTION, bc=bc, doc=polygonObj.GetDocument()) # Assign random values weights = [float(n % 4 == 0) for n in range(vMap.GetDataCount())] vMap.SetAllHighlevelData(weights) # Retrieve existing vertexMap and shader from the applied material that use this vertex map shaderUsingOldVertexMap = [] tMapOld = op.GetTag(c4d.Tvertexmap) if tMapOld is not None: shaderUsingOldVertexMap += FindAllVetexShaderFromObj(op, tMapOld) tMapOld.Remove() # Creates a new tag with the correct number of data and disable it so C4D don't overwrite it # Cross-thread Operation, that could crash Cinema 4D vMapGenerator = op.MakeVariableTag(c4d.Tvertexmap, polygonObj.GetPointCount()) vMapGenerator[c4d.EXPRESSION_ENABLE] = False # Copy the data from the vertex map within the generator to the one exposed to the user vMapGenerator.SetAllHighlevelData(vMap.GetAllHighlevelData()) # Remap all the vertex shader to use the new vertex map. for shader in shaderUsingOldVertexMap: shader[c4d.SLA_DIRTY_VMAP_OBJECT] = vMapGenerator return polygonObj Cheers, Maxime.

You can use LayerSet.AddLayer('myPSD_LayerName') which will select the layer of the layerSet. It works, However, you can't retrieve the name of the PSD layers using LayerSet so I'm still stuck with the SendPainterCommand openGL bug and MultiPassBitmap not functioning with Python.

Hello, if in doubt, one can always call c4d.StopAllThreads() before editing the active document from some user interaction in the main thread. This call will terminate other threads that may also currently use the active document (e.g. viewport rendering). best wishes, Sebastian

Hi eldiren, thanks for following up. With regard to the different amount of errors between R19 and R20 without better clarification on what were the errors on R19 I would not argue about things being "better". In R20 plugin project files are created by using the Project Tool whilst in R19 projects had to be setup manually. This could maybe helped to a certain extent. Because of the use of the Project Tool and the need to include both external headers and libraries I recommend to have a look at: including headers adding external libs Finally I recommend to switch to Alembic 1.7.7 which was the revision used in Cinema 4D R20 in order to limit potential conflicts due to the different revision level or to use your source in a separate namespace to make sure “your” Alembic binaries are used. Best, R

Thanks! I'll try that.

Hi Filip, thanks for reaching out us. With regard to your issue, I'm a bit confused by the need you have to call BaseDocument::AnimateObject() or BaseDocument::ExecutePasses() when the VIDEOPOSTCALL in VideoPostData::Execute() is VIDEOPOSTCALL::INNER. Actually when you're in this step, you can already access and query the VolumeData to retrieve all the relevant information about the scene elements (like RayObject, RayLight and so on). If for optimization reasons you need to execute these calls nevertheless, I warmly recommend cloning the whole document on a temp doc, perform your actions there, use this temp doc to feed your renderer with the needed data and, in the end, dispose the temp doc. Consider that this approach is sub-optimal since you're going to double the resources used to store the current document. Best, R

Hi Frank, thanks for reaching out us. With regard to your request, aside from confirming that nothing comes with Python API for obvious performance reasons, in C++ the nearest thing you can find is KDtree - as already pointed out by @zipit - or other similar accelerating structures. On top of these notes, I would consider this topic more a general programming / algorithm-related topic which could find, based on the contour conditions, different "better" solutions. Best, R

Thanks, Maxime. No urgency from my side. Just stumbled across it, when actually trying to do something completely different. My best wishes to the entire team.

Hello Sebastian, sorry, for not using the QA System, will do in the future! This was exactly what I needed. I have never changed my GUI outside the res file and it felt kinda confusing to me what exactly I have to do after reading the doc. Thanks for your awnser! Best Regards, Florian

Hi bentraje, thanks for reaching out us. With regard to your request, be aware that call c4d.EventsAdd() just add an event to the Cinema 4D scene evaluation queue, but you're actually not granted this to be executed immediately. Rather different instead is to call c4d.BaseDocument.ExecutePasses() which instead has the direct effect to the have Cinema 4D immediately evaluating a scene. Finally assuming that the final intent was, as shown in the screen-recording, to align orientation of items in the scene why not taking advantage of BaseObject.SetMg() / BaseObject.GetMg()? Best, R

Hello, the important question is, if you want to open a modal or asynchronous dialog. An asynchronous dialog must be hosted by a CommandData plugin (GeDialog Manual) (e.g. py-memory_viewer). As mentioned above, a double-click on a tag can be detected by looking for the MSG_EDIT message (NodeData::Message() Manual). So, when you detect MSG_EDIT, you simply have to execute the command that hosts you dialog. You can simply do that using CallCommand() (Command Utility Manual). Within your dialog, you can find your tag by getting the active tag. best wishes, Sebastian

Yes, C4DAtom.CheckType() in Python. Thanks for the confirmation, it bugged me that it was only in the Python doc but not in the C++ doc.