Hi vtkers,
I am writing a multiple output port reader algorithm.
I am catching the vtkDemandDrivenPipeline::REQUEST_DATA_NOT_GENERATED()
and acting on it with
...
vtkInformation* outInfo->Set( vtkDemandDrivenPipeline::DATA_NOT_GENERATED(),
1);
on some ports.
...
However, this is causing problems because the reader is getting a
RequestData() every time the pipeline gets an Update().
47 //----------------------------------------------------------------------------
48 void vtkInformationIntegerKey::Set(vtkInformation* info, int value)
49 {
50 if(vtkInformationIntegerValue* oldv =
51 static_cast<vtkInformationIntegerValue *>
52 (this->GetAsObjectBase(info)))
53 {
54 // Replace the existing value.
55 oldv->Value = value;
56 // Since this sets a value without call SetAsObjectBase(),
57 // the info has to be modified here (instead of
58 // vtkInformation::SetAsObjectBase()
59 info->Modified();
60 }
61 else
62 {
63 // Allocate a new value.
64 vtkInformationIntegerValue* v = new vtkInformationIntegerValue;
65 this->ConstructClass("vtkInformationIntegerValue");
66 v->Value = value;
67 this->SetAsObjectBase(info, v);
68 v->Delete();
69 }
70 }
71
I think the info->Modified() is causing the issue. Is this a bug in the
Executive? Is there a way I could work around this by calling
this->Modified() somewhere else? There seems to be no methods for setting
the MTime back.
BTW, using vtk 5.2 with a algorithm that inherits from vtkMedicalImageReader2
and has a vtkStreamingDemandDrivenPipeline executive.
Thanks.