generate PLA Keys ?

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On 28/12/2002 at 05:04, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   8.012 
Platform:      
Language(s) :   C.O.F.F.E.E  ;

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Hi,
got another little problem: I move some points of an obj, then i want to set a PLAKey for it. well, the timeline shows me the new key, but nothing seems to be stored in it. I tried to store the data in a PointTag , but that didn´t work either. Even explicite selecting of the moved points did´nt help .I do not understand the PLA Keys totaly. Can anybody help me ?

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On 30/12/2002 at 01:36, xxxxxxxx wrote:

Unfortunately it's not possible to create your own PLA keys in C.O.F.E.E. (both R7 and R8). The reason is that you cannot change the element count in VariableTags and it's thus only possible to create empty PointTags.

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On 30/12/2002 at 04:52, xxxxxxxx wrote:

Are you sure that this is not possible?

I found this in my old COFFEE sources. (And as far as I remember I made PLA keys with Coffee.)

  
               var vc=new(VariableChanged);  
               vc->Init(old_pointcount,new_pointcount);  
               obj->MultiMessage(MSG_POINTS_CHANGED,vc);  

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On 30/12/2002 at 07:57, xxxxxxxx wrote:

Well, that's a VariableChanged object not a VariableTag. But your approach to use a dummy message is clever. I'm not sure if this is what you suggested, but it led me to the following workaround:

    
    
      
    // Expression to insert a PLA key onto the first track's first   
    // sequence (given that they are of the right types) of a cube.  
      
    main(doc,op)  
    {  
      var pt = new(PointTag);
    
    
    
    
      var vc = new(VariableChanged);  
      vc->Init(0, 8);  
      pt->Message(MSG_POINTS_CHANGED,vc);
    
    
    
    
      var ps = op->GetPoints();  
      ps[0] = vector(200);  
      pt->SetData(ps);
    
    
    
    
      var pla = new(PLAKey);  
      pla->SetPointTag(pt);
    
    
    
    
      op->GetFirstTrack()->GetFirstSequence()->InsertKey(pla);  
    }

And this code actually seems to work fine in R8!

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On 02/01/2003 at 09:49, xxxxxxxx wrote:

Hi,
I used the code above an it worked on the first try !!
Thanks for the help, i can finish my Plugin now .
Greetings, Nico