created spline disappear in Points Mode

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED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

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED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();**

Helper

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 RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED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

Helper

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).

Helper

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.

Helper

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

Hi Yannick,

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