[vtkusers] problem visualizing simple grid

[Marcel Schiffel]

Hi,

this one is probably pretty trivial: as a first test I'm trying to
visualize a really simple grid, but keep getting an empty render
window. What am I doing wrong?

Many Thanks


#include "vtkDataSetMapper.h"
#include "vtkRenderWindow.h"
#include "vtkActor.h"
#include "vtkRenderer.h"
#include "vtkStructuredGrid.h"
#include "vtkPoints.h"
#include "vtkRenderWindowInteractor.h"
#include "vtkHedgeHog.h"
#include "vtkCamera.h"
#include "vtkProperty.h"

int main()
{
    double p1[3] = {0,0,0};
    double p2[3] = {1,0,0};
    double p3[3] = {0,1,0};
    double p4[3] = {1,1,0};

    vtkStructuredGrid *sgrid = vtkStructuredGrid::New();

    vtkPoints *points = vtkPoints::New();
    points->Allocate(4);

    points->InsertPoint(0,p1);
    points->InsertPoint(1,p2);
    points->InsertPoint(2,p3);
    points->InsertPoint(3,p4);

    sgrid->SetPoints(points);
    points->Delete();

    vtkDataSetMapper *sgridMapper = vtkDataSetMapper::New();
    sgridMapper->SetInput(sgrid);
    vtkActor *sgridActor = vtkActor::New();
    sgridActor->SetMapper(sgridMapper);
    sgridActor->GetProperty()->SetColor(0,0,0);

    vtkCamera *camera = vtkCamera::New();
    camera->SetPosition(0,0,1);
    camera->SetFocalPoint(0,0,0);


    vtkRenderer *ren1= vtkRenderer::New();
    ren1->AddActor( sgridActor );
    ren1->SetActiveCamera(camera);
    ren1->ResetCamera();
    ren1->SetBackground(.5,.5,.5);

    vtkRenderWindow *renWin = vtkRenderWindow::New();
    renWin->AddRenderer( ren1 );
    renWin->SetSize( 800, 600 );

    vtkRenderWindowInteractor *iren = vtkRenderWindowInteractor::New();
    iren->SetRenderWindow(renWin);

    renWin->Render();
    iren->Start();


    sgrid->Delete();
    sgridMapper->Delete();
    sgridActor->Delete();
    ren1->Delete();
    renWin->Delete();

    return 0;
}