Examples of javax.media.opengl.GL.glViewport()

javax.media.opengl.GL.glViewport()
Interface to C language function:
void {@native glViewport}(GLint x, GLint y, GLsizei width, GLsizei height);

    final GLU glu = new GLU();


    if(height <= 0)
      height = 1;


    gl.glViewport(0, 0, width, height);


    gl.glMatrixMode(GL.GL_PROJECTION);                //Select the Projectionmatrix
    gl.glLoadIdentity();                    //Reset the current matrix
    glu.gluPerspective(45.0f, width / height, 0.1f, 1000.0f);  //set the Viewing Volume

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      glu.gluOrtho2D(0.0f, width, 0.0, height);
      
      glMatrixMode.invoke(gl, GL2.GL_MODELVIEW);
      glLoadIdentity.invoke(gl);
      
      gl.glViewport(0, 0, width, height);
    } catch (Exception ex) {
      ex.printStackTrace();
    }
  }

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  }


  @Override
  public void reshape(GLAutoDrawable drawable, int x, int y, int width, int height) {
    GL gl = drawable.getGL();
    gl.glViewport(x, y, width, height);
    onReshape(drawable, x, y, width, height);
  }
  
  @Override
  public void display(GLAutoDrawable drawable) {

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