[vtkusers] Using OpenGL with VTK (2)

[Leandro Iglezias]

Hi,

I read the mesage about this subject, but I didn´t use Opengl commands with VTK. For example, I would like to draw lines using commands OpenGL.
Ex:
 
renWin->Render();

    glBegin (GL_LINES);
       glVertex2f (-2.5, 2.5);
       glVertex2f (2.5, -2.5);
     glEnd ();

  iren->Start();

But doesn´t appears.
How do I  make this work?

Leandro Iglezias

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