4. created spline disappear in Points Mode

created spline disappear in Points Mode

  • H

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 19/09/2012 at 04:14, xxxxxxxx wrote:

    User Information:
    Cinema 4D Version:   13 
    Platform:   Windows  ;   
    Language(s) :     C++  ;

    ---------
    User Information:
    Cinema 4D Version:   13 
    Platform:   Windows  ;   
    Language(s) :     C++  ;

    ---------
    Hi

    i have a plugin which creates a SplineObject sets the Points and inserts it into the Document.

    Well all its write but if i select the Spline in Points Mode in Cinema the Spline disappear.
    If I Select a point of the Spline and move it the Spline appears.

    What have i done wrong?

    The Code:
      BaseDocument *doc = GetActiveDocument();
      SplineObject *myspline = SplineObject::Alloc(5,SPLINETYPE_BSPLINE);
      Vector *point = myspline->GetPointW();
      for (int i = 0; i < myspline->GetPointCount(); i++)
      {
          point _.x = (LReal)(i * 100);
          point _.z = (LReal)((i%2) * 100);
      }
      myspline->SetName("newname");
      doc->InsertObject(myspline,NULL,NULL);

    greatings
    RM

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  • H

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 19/09/2012 at 04:52, xxxxxxxx wrote:

    Hi and welcome Ralf,

    After changing its points, a point object (polygon, spline etc.) needs to be updated by calling Message(MSG_UPDATE).
    Your code doesn't compile because of the point array declaration and usage. Also don't forget to notify Cinema that a change happened in the scene with EventAdd() to see the created spline effectively added to the scene. Here's the code:

    SplineObject *myspline = SplineObject::Alloc(5,SPLINETYPE_BSPLINE);
Vector *points = myspline->GetPointW();
for (LONG i = 0; i < myspline->GetPointCount(); i++)
{
    points[i].x = (LReal)(i * 100);
    points[i].z = (LReal)((i%2) * 100);
}
 **myspline- >Message(MSG_UPDATE);**
myspline->SetName("newname");
  
doc->InsertObject(myspline,NULL,NULL);
 **EventAdd();**
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  • H

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

    On 19/09/2012 at 23:00, xxxxxxxx wrote:

    thx for the fast reply

    => could be closed

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  • H

    On 27/07/2015 at 08:21, xxxxxxxx wrote:

    Hi,

    I have one more question relevant to this post:
    If you create objects inside GetVirtualObjects(), they don't need to be updated, right?
    And there should also be no need to call EventAdd(), right?

    At least I don't have it, and my code works perfectly fine (as far as I can see).

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  • H

    On 28/07/2015 at 00:50, xxxxxxxx wrote:

    Hi Casimir,

    Originally posted by xxxxxxxx

    I have one more question relevant to this post:
    If you create objects inside GetVirtualObjects(), they don't need to be updated, right?
    And there should also be no need to call EventAdd(), right?

    At least I don't have it, and my code works perfectly fine (as far as I can see).

    Exactly. The code I posted above is to be run in the context of a CommandData plugin Execute().
    In ObjectData::GetVirtualObjects() an object created isn't in the document till it's returned. Cinema then takes care of updating the shown object and the document.

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  • H

    On 28/07/2015 at 02:19, xxxxxxxx wrote:

    Hi Yannick,

    Thanks for your answer, I'm glad I was right :p

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