What would a graphics package be without the ability to create three dimensional graphics?

Shading Variants
These three cylinders show the differences between Flat shading, Gouraud shading, and Phong shading. Surprisingly, the Gouraud and Phong shaded cylinders aren't all that different. 
  cyl = new vtkCylinderSource;
    cyl->SetResolution(8);
  cylMapper = new vtkPolyMapper;
    cylMapper->SetInput(cyl->GetOutput());

  cyl1Actor = new vtkActor;
    cyl1Actor->SetMapper(cylMapper);
    cyl1Actor->GetProperty()->SetFlat();
    cyl1Actor->GetProperty()->SetColor(1,1,1);

  cyl2Actor = new vtkActor;
    cyl2Actor->SetMapper(cylMapper);
    cyl2Actor->GetProperty()->SetGouraud();
    cyl2Actor->GetProperty()->SetColor(1,1,1);

  cyl3Actor = new vtkActor;
    cyl3Actor->SetMapper(cylMapper);
    cyl3Actor->GetProperty()->SetPhong();
    cyl3Actor->GetProperty()->SetColor(1,1,1);
A greyscale comparison of Flat and Gouraud shading - removed to conserve space

Lighting Variants

These images used to animate, but are now static to conserve space		 These cylinders are animating through differing lighting properties. The leftmost cylinder varies in its diffuse component, keeping specular and ambient properties constant. The middle cylinder varies in its specular component, and the rightmost cylinder varies in its ambient component. 
  cyl = new vtkCylinderSource;
    cyl->SetResolution(8);
  cylMapper = new vtkPolyMapper;
    cylMapper->SetInput(cyl->GetOutput());

  cyl1Actor = new vtkActor;
    cyl1Actor->SetMapper(cylMapper);

  cyl2Actor = new vtkActor;
    cyl2Actor->SetMapper(cylMapper);

  cyl3Actor = new vtkActor;
    cyl3Actor->SetMapper(cylMapper);

  for(i=1;i<10;i++) {
    cyl1Actor->GetProperty()->SetDiffuse(i/10);
    cyl2Actor->GetProperty()->SetSpecular(i/10);
    cyl3Actor->GetProperty()->SetAmbient(i/10);

    renWindow->Render();
  }
Varying specular power - link removed to conserve space
Camera Variants

This image used to animate, but is now static to conserve space		 Here we see how camera motion can influence the picture. The leftmost camera is cycling through 30-degree changes in azimuth; the middle camera is "dollying" towards the cone; and, the rightmost camera is rolling around the direction of projection. 
  cone = new vtkConeSource;
    cone->SetResolution(8);
  coneMapper = new vtkPolyMapper;
    coneMapper->SetInput(cone->GetOutput());

  cone1Actor = new vtkActor;
    cone1Actor->SetMapper(coneMapper);

  cone2Actor = new vtkActor;
    cone2Actor->SetMapper(coneMapper);

  cone3Actor = new vtkActor;
    cone3Actor->SetMapper(coneMapper);

  for(i=1;i<=12;i++) {
    ren1->GetActiveCamera()->Azimuth(30);
    ren2->GetActiveCamera()->Dolly(1.1);
    ren3->GetActiveCamera()->Roll(30);
  
    renWindow->Render();
  }
Camera movements around a focal point - dead link to conserve space

Camera movements centered at camera position - dead link to conserve space

Advanced Models

This image used to animate, but is now static to conserve space. 		More advanced models can be built up from the building blocks. Here we see a rotating mace, generated by placing cones at the vertices of the underlying sphere and scaling them down. 
  sphere = new vtkSphereSource(8);
  sphereMapper = new vtkPolyMapper;
    sphereMapper->SetInput(sphere->GetOutput());
  sphereActor = new vtkActor;
    sphereActor->SetMapper(sphereMapper);

  cone = new vtkConeSource(6);

  glyph = new vtkGlyph3D;
    glyph->SetInput(sphere->GetOutput());
    glyph->SetSource(cone->GetOutput());
    glyph->UseNormal();
    glyph->ScaleByVector();
    glyph->SetScaleFactor(0.25);

  spikeMapper = new vtkPolyMapper;
    spikeMapper->SetInput(glyph->GetOutput());
  spikeActor = new vtkActor;
    spikeActor->SetMapper(spikeMapper);

  renderer->AddActors(sphereActor);
  renderer->AddActors(spikeActor);
  renderer->SetBackground(1,1,1);
  renWin->SetSize(450,450);

  // interact with data
  for(i=1;i<12;i++) {
    renderer->GetActiveCamera()->Azimuth(15);
    renWin->Render();

    sprintf(fname,"%d.ppm",i);
    renWin->SetFilename(fname);
    renWin->SaveImageAsPPM();
  }
A stereoscopic mace - dead link to conserve space

Using Tk to control graphical aspects - dead link to conserve space

Varying the focal point - dead link to conserve space

Buffering rotations for motion blur - dead link to conserve space