How to rotate tangents



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 11/12/2002 at 09:26, xxxxxxxx wrote:

    User Information:
    Cinema 4D Version:   8.012 
    Platform:   Windows  ;   
    Language(s) :     C++  ;

    ---------
    Hi,
    how can I rotate the tangents of a bezier spline? I don´t know how to handle the tangent[x].vl and .vr vectors. In cinema it´s definetly easier ;)
    Thanks
    Samir



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 11/12/2002 at 09:50, xxxxxxxx wrote:

    Just treat them as ordinary vectors in object space. How exactly do you want to rotate them?



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 11/12/2002 at 09:56, xxxxxxxx wrote:

    well, I am calculating a rotationvector from a splinetangent with:

        
        
        Vector rot = obj->GetSplineTangent(obj->UniformTonatural(x*(lenght/4)/length),0);
    

    Now I want to rotate the tangents with this rotationvector.
    I tried this with

        
        
        objt[0].vl *= rot;  
          objt[0].vr *= rot;
    

    but that doesn´t work.



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 11/12/2002 at 11:08, xxxxxxxx wrote:

    Use ^= since vl and vr are vectors not points. And I see no rotation matrix, just a rotation vector. (vector * vector = dot product) Use RotAxisToMatrix() before multiplying.



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 12/12/2002 at 08:34, xxxxxxxx wrote:

    thanks I will try that. And another question without the need to open a new thread.
    I have a LINK Description for my plugintag, but how to retrieve the dropped object?
    Thanks
    Samir



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 12/12/2002 at 08:52, xxxxxxxx wrote:

    or of a string field from a STRING description.
    String str = data->GetString(ID); or
    String str; data->GetString(ID,str);
    do both not work.



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 12/12/2002 at 10:10, xxxxxxxx wrote:

    I tried this but it doesn´t seem to work either. In the doc example there is a t_data instead of my data, but I have no clue what it is good for. Help please...
    Bool DPTransfer::Message(GeListNode *node,LONG type,void *data)
    {
      
        if (type == MSG_DESCRIPTION_CHECKDRAGANDDROP)
        {
          DescriptionCheckDragAndDrop *dcu = static_cast<DescriptionCheckDragAndDrop*>( data ); //t_data??
          switch (dcu->id[0].id)
          {
              case DPT_BASE_FOUND:
              dragged = (BaseObject* )dcu->element;
            return TRUE;
          }
        }
    return TRUE;
    }



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 12/12/2002 at 10:24, xxxxxxxx wrote:

    ok sorted it. It works exactly like that. Only my fault. :)
    Thanks anyway for looking. g*



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 02/05/2005 at 06:25, xxxxxxxx wrote:

    Hi All,
    Works for me to sofar, but here you check for a object hoovering above the Link. It can be used to accept or refuse the hoovering object.
    Now, how do i find out when the object is finally dropped.
    There seem to be no message for that.
    Thanks



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 03/05/2005 at 02:15, xxxxxxxx wrote:

    Wouldn't that be an ordinary SetDParameter() call?



  • THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 03/05/2005 at 11:21, xxxxxxxx wrote:

    Hi Mikael,
    Thanks for your answer but a GePrint("Bingo")  does not appear in my console with the SetDParameter() call.
    A lot of Bingo's in the tags Message function, listening to MSG_DESCRIPTION_CHECKDRAGANDDROP on hoovering.
    (i have a Description res Linkbox, its for the AM)
    What am i doing wrong?
    Thanks,


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