General Programming & Plugin Discussions

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  Read Before Posting
  general notes • • maxon  

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  SOLVED Accessing object container in C++.
  c++ r21 general programming • • Danchyg1337  

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  Hi internally as stated in the documentation of GeListNode._setitem__ and GeListNode._getitem__ it's just a wrapper arround respectively C4DAtom.SetParameter and C4DAtom.GetParameter. Then Set/GetParameter will call the respective NodeData.G/SetDParameter of the GeListNode implementation. This method lets you define how the parameter access is done (aka retrieving the data from a local member variable or reading the base container made by the description). So if we go back to the s/getitem, internally in python it builds automatically a DescId based on the data provided doing a stupid If pyData.Class == PyBool: DescId(pyData, DTYPE_BOOL, 0) so you can easily reproduce this part too. But I don't think in C++ you can't support multiple arguments in the bracket operator see C++ [] array operator with multiple arguments?, so you could somehow hack around with the usual () operator, but our classic API doesn't really provide a mean of inspection so you will need to either do a lot of overrides or have unsafe void pointer arguments while PythonObject always has a type attached to them so you can at any time accept a PyObject* and retrieve is real DataType, and this is exactly what is possible to do with the MAXON API where you register datatype as MAXON_DATATYPE then they all can be retrieved in the form of a maxon::Data but you still have access to its maxon::Id and you can know the datatype ID and doing a safe casting. Hope this answers your questions. Cheers, Maxime.
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  The asymmetric matrix inversion issue
  python limitation • • Cairyn  

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  Hi, @Cairyn said in The asymmetric matrix inversion issue: I guess it depends on the point you want to make... I would mostly agree, but my point point was more the other way around. Not that shearing is a thing you commonly want to do, but the fact the you should be aware that c4d.Matrix will not enforce an orthogonal basis. Because if you thought it does, you could for example think that my_frame = c4d.Matrix(v3=my_normal) would be a sufficient way to construct an orthogonal frame where my_normal is k and then carry out some transforms with it and wonder what the heck is going wrong. @Cairyn said in The asymmetric matrix inversion issue: This has, in fact, been a point I thought long and hard about... What I meant with that passage was the story which has been attributed to many famous programmers who left a complicated piece of code only commented with "and here comes the tricky part". Usually told as a testament to both their technical genius and their communicative shortcomings. The often (at least silently) admired notion is that "everything is self explanatory for a smart person". Which of course is neither true nor very "cool". I feel you are drifting a bit into that direction. About the linear algebra stuff. In my opinion there is no wrong or right there, you can do a good job with a very coarse and with a very fine model. Although I think often the geometrical meaning of linear algebra has been neglected in teachings about it. Especially Cinema's "matrices" (which in my book do not really qualify as matrices) can be very well explained as linear maps which will automatically will make all four principal transforms intuitively clear. Everything that is left then is to explain that matrices are just another way to write a linear map, i.e. a linear combination of vectors representing a coordinate system. Cheers, zipit
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  UNSOLVED Matrices / Rotations / Quaternions when transferring data.
  python brainstorming • • lasselauch  

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  Hey guys, just wanted to let you know, that I've cracked the case in the meantime. Here are my findings: def convert_matrix_left_to_right(m): # http://www.techart3d.com/2016/02/convert-left-handed-to-right-handed-coordinates/ # m = op.GetMg() new_m = c4d.Matrix( m.off, m.v1*-1, m.v2, m.v3) return new_m def rotate_y_axis_180(): # Construct your own matrix based on rotation of axis # https://www.mathworks.com/help/phased/ref/roty.html x = c4d.Vector(-1, 0, 0) y = c4d.Vector(0, 1, 0) z = c4d.Vector(0, 0, -1) off = c4d.Vector(0, 0, 0) return c4d.Matrix(off, x, y, z) def GetGlobalRotation(obj): m = obj.GetMg() new_m = rotate_y_axis_180() * convert_matrix_left_to_right(m) return c4d.utils.MatrixToHPB(new_m, order=c4d.ROTATIONORDER_XYZGLOBAL) Indeed you have to convert from a left-handed (c4d) (hpb) to a right-handed (houdini) (xyz) coordinate system... plus I've found that you need to add 180° to the y axis, so I constructed a matrix in rotate_y_axis_180 that I can multiply to my converted matrix. Hope it helps someone... Thank you guys for your input! Have a great weekend and stay safe! Cheers, Lasse
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  UNSOLVED Cinema 4D Client R21 Service Creation
  r21 bug report general notes • • thestraycat  

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  @r_gigante - Hi R. Some time has past and i was wondering what progress you guys may have made on this issue?
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  SOLVED Best way to fill a maxon::BaseArray
  c++ general programming brainstorming • • C4DS  

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  Unfortunately, differently from std lib where it's possible to define and init a vector pretty easily using one-line statement( std::vector<int> a (10, 100);) this looks like being not currently possible with maxon::BaseArray() and you need to make it the usual way. Best, R
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  SOLVED Moving a Point Along an Arc by Distance from another Point
  python general programming • • blastframe  

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  @zipit My sincerest gratitude for your help. Not only did you get my project unblocked, but you answered my follow-up questions. I have learned a lot from you. Thank you!
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  Send Python Code To C4D from any Texteditor
  python • • mikeudin  

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  @mikeudin thanks
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  SOLVED How to fillet a ObjectData edge in Python?
  python general programming • • blastframe  

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  @zipit Absolutely incredible work! So elegant! Thank you very much @m_adam Thank you for the reply and confirmation!
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  SOLVED R21 Project Tool?
  c++ r21 • • bentraje  

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  @Cairyn @zipit @m_magalhaes Thanks for the detailed response. After installing the C++ environments, it works as expected. Sorry new to this. As I only have python to reference for. I also managed to build the plug-ins using this guide: https://plugincafe.maxon.net/topic/10967/compiling-the-cinema-4d-r20-c-sdk-examples
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  UNSOLVED Xparticles Failed to load
  • adam_k_garner  

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  hi, I've forked your post to a new thread. As Kent said, you should remove X-Particles.xdl64. This one failed and maybe bloc X-partiles_21 to load. Give it a try and let us know. Cheers, Manuel
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  UNSOLVED How to load a file with python and turn it into the active document ?
  • sakomaxo  

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  I have replied your post at C4DCafe. "The c4d.documents.LoadDocument returns you a BaseDocument, which you then need as argument for the InsertBaseDocument and SetActiveDocument."
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  UNSOLVED How to decompile cdl64 file?
  • trideshnik  

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  @trideshnik said in How to decompile cdl64 file?: Hmm.. so.. Comrades, before getting the necessary information, I was told 100500+ times about copyright. Everyone saw fit to indicate this. Dear, do you think that the person asking this question needs a triple copyright notice? If you do not want to answer or help, no one is forcing you, but making idiots out of people is bad form. I got a ton of off-topic information. reasoning, warnings. and only a fraction of the information I need. so nice. but. Thanks to those who indicated the direction in which to dig. P.S. it seems to me that this is such a lifestyle. okay) khkhgxghzhuxvvldqkdfnhuv This answer is considered irrespecutful and contradicts the collaboration spirit of the forum. User banned.
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  SOLVED Possibility of using ExecuteSubID with ToolData.
  c++ r21 • • Danchyg1337  

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  Hi @Danchyg1337, thanks for reaching out to us. The approach you've pointed out can work to activate a ToolData with a specific preset. You've to register a CommanData for every preset you'd like your ToolData to use and, if needed, you can register your ToolData passing the PLUGINFLAG_HIDEPLUGINMENU to avoid that the generic ToolData appears among the menus. Best, Riccardo
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  Support of Scene Nodes development
  • iluxa7k  

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  @m_magalhaes said in Support of Scene Nodes development: @iluxa7k said in Support of Scene Nodes development: Several suggestions at c4d cafe forums, if will be time to read them Do you have any link for us ? I know that a couple of Maxon guys are already looking closely to that forum (and others) https://www.c4dcafe.com/ipb/forums/forum/289-scene-nodes-workflows-discussion/ https://www.c4dcafe.com/ipb/forums/topic/111961-nodes-road-map/?&page=5#comments https://www.c4dcafe.com/ipb/forums/topic/111939-maxon-announces-cinema-4d-r23-overview-discussion/?page=22&tab=comments#comment-721276
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  UNSOLVED Can't add plugin name into cinema4d
  r21 • • Yaroslav  

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  hi, don't worry, I've made this one several times. Feel free to ask questions as you go it needed. Cheers, Manuel
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  SOLVED The slider tool returns False.
  python r21 • • x_nerve  

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  Hi @x_nerve the ID used is not the correct one you should use: 431000021 for edge mode and 431000030 for point mode, unfortunately, there are no symbols for these tools. Cheers, Maxime.
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  UNSOLVED Rendering with specific camera ?
  python • • nicholas_yue  

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  The proper way, as pointed out by @zipit, to set the scene active camera is to use BaseDraw::SetSceneCamera(). Any other special weird way are needed or recommended. Best, R
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  SOLVED Some attempts at nondestructive modeling
  python r21 • • x_nerve  

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  Hi: After a trial run, the script was tested successfully. By setting the name suffix of Python Tag, the problem of repeated running of Tag can be solved. Taking c4d.DIRTYFLAGS_SELECT as an example, if the point, line, and surface selections change, it will execute, otherwise it won't. The Python script code is as follows: import c4d #e-mail: xiuziye@qq.com def main(): Name = op.GetName() Objects = op.GetObject() Changed = Objects.GetDirty(c4d.DIRTYFLAGS_SELECT) Text = ["xit" + str(Changed)[-1]] if str(Name).count(Text[0][:-1]) != 0 : if str(Name).find(Text[0][:-1]) != str(Name).rfind(Text[0][:-1]) : if str(Name)[str(Name).rfind(Text[0][:-1]):] == Text[0] : if str(Name).find(Text[0][:-1]) <= 0: #Do not execute, exit the program. print ("Does not perform.") op.SetName(str(Text[0])) return else: #Do not execute, exit the program. op.SetName(str(Name)[:str(Name).find(Text[0][:-1])] + str(Text[0])) print ("Does not perform.") return else: if str(Name).find(Text[0][:-1]) <= 0: op.SetName(str(Text[0])) print ("Perform.") else: op.SetName(str(Name)[:str(Name).find(Text[0][:-1])] + str(Text[0])) print ("Perform.") else: if str(Name)[str(Name).rfind(Text[0][:-1]):] == Text[0] : #Do not execute, exit the program. print ("Does not perform.") return else: op.SetName(str(Name)[:str(Name).find(Text[0][:-1])] + str(Text[0])) print ("Perform.") else: print ("Perform.") op.SetName(str(Name) + str(Text[0])) print ("pass") #The next thing to execute.
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  UNSOLVED PySide2 for Python 2.7 Windows Version?
  python r21 • • bentraje  

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  Hello Trolltech officially does not support pyside2 for py27 Win. raw test of