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<DIV><FONT face=Arial size=2>Hi! I'm a beginer in VTK and I've been trying to
draw the sinus func with vtkxyplotactor. The strange thing is that although I
indicate which are the x-y components in the values array, the system
draws the "arc sin" function. I don't know how to understand this; Am
I wrong? or the system swap components?</FONT></DIV>
<DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Here's the code:</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>#include "vtkPointData.h"<BR>#include
"vtkPoints.h"<BR>#include "vtkCellArray.h"<BR>#include
"vtkPolyData.h"<BR>#include "vtkRenderer.h"<BR>#include
"vtkRenderWindow.h"<BR>#include "vtkRenderWindowInteractor.h"<BR>#include
"vtkXYPlotActor.h"<BR>#include "vtkDataSetCollection.h"</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>int main(){</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>// CONSOLE: how many points entry to
form the "line".</FONT></DIV>
<DIV><FONT face=Arial size=2>// CONSOLA: Ingreso de la cantidad de puntos
que formarán la "curva".</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> int
data_puntos;<BR> cout<<"Ingrese cantidad de puntos
(1-50): ";<BR> cin>>data_puntos;</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>// Creación de una Celda - Definición
topológica y geométrica</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>// Definición Topológica<BR>//
Inserción de 1(una) celda con 'n' puntos<BR> vtkCellArray
*cellarray=vtkCellArray::New();<BR>
cellarray->InsertNextCell(data_puntos);</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>// Definición Geométrica y relación con la
topología</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2> vtkPoints
*puntos=vtkPoints::New();</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2> for(int
j=0;j<data_puntos;j++){<BR>
cellarray->InsertCellPoint(j); // ___ j = nºID de cada
punto<BR>
puntos->InsertPoint(<BR>
j, // _________________________ nº
ID<BR>
j/5.0, // _____________________ valor de
"x"<BR>
sin(j/5.0), // ________________ valor de
"y"<BR>
0.0 // _________________________valor de
"z"<BR>
);}</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>// Agregado de información topológica y
geométrica al DataSet</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2> vtkPolyData
*polydata=vtkPolyData::New();<BR>
polydata->SetPoints(puntos); // Puntos<BR>
polydata->SetLines(cellarray); // Celdas - 1(una)</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>
polydata->GetPointData()->SetScalars(puntos->GetData());<BR>
polydata->GetPointData()->Update();</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>// Creación de un Actor</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2> vtkXYPlotActor
*actor=vtkXYPlotActor::New();</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>
actor->SetXValuesToValue();<BR>
actor->SetDataObjectXComponent(0,1);<BR>
actor->SetDataObjectYComponent(0,2);</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>
actor->AddInput(polydata);<BR> </FONT></DIV>
<DIV><FONT face=Arial size=2>// The following didn't help me enough... : (
</FONT></DIV>
<DIV><FONT face=Arial size=2>
cout<<endl<BR>
<<"GetInputList()->GetNumberOfItems()="<<actor->GetInputList()->GetNumberOfItems()<<endl<BR>
<<"GetDataObjectXComponent(0)="<<actor->GetDataObjectXComponent(0)<<endl<BR>
<<"GetDataObjectYComponent(0)="<<actor->GetDataObjectYComponent(0)<<endl<BR>
<<"GetXValues()="<<actor->GetXValues()<<endl<BR>
<<"GetXValuesAsString()="<<actor->GetXValuesAsString()<<endl<BR>
<<"GetPointComponent(0)="<<actor->GetPointComponent(0);</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>// Creación de objetos de
renderización</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2> vtkRenderer
*renderer=vtkRenderer::New();<BR>
renderer->AddActor2D(actor);<BR>
renderer->SetBackground(0.0,0.0,0.0);</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2> vtkRenderWindow
*ventana=vtkRenderWindow::New();<BR>
ventana->AddRenderer(renderer);</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2> vtkRenderWindowInteractor
*interac=vtkRenderWindowInteractor::New();<BR>
interac->SetRenderWindow(ventana);</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2> ventana->Render(); // Inicio
de la renderización<BR>
interac->Initialize();<BR> interac->Start(); //
Inicia el "looping"</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Arial size=2>
polydata->Delete();<BR>
puntos->Delete();<BR>
cellarray->Delete();<BR>
actor->Delete();<BR>
renderer->Delete();<BR>
ventana->Delete();<BR> interac->Delete();</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2> return 0;}</FONT></DIV>
<DIV><FONT face=Arial size=2></FONT> </DIV>
<DIV><FONT face=Arial size=2>Thanks in advance!
Isidro.</FONT></DIV></DIV></BODY></HTML>