Function pick

Rendering/Core/Testing/Python/pickCompositeData.py:209–239

Position the camera such that a ray through the screen center points in z direction at position xy, and pick with vtkPicker, vtkPointPicker and vtkCellPicker. Returns the number of errors

(xy,propPickData,pointPickData,cellPickData)

def pick(xy,propPickData,pointPickData,cellPickData):
    """
    Position the camera such that a ray through the screen center
    points in z direction at position xy, and pick with vtkPicker,
    vtkPointPicker and vtkCellPicker.
    Returns the number of errors
    """
    size=rw.GetSize()
    p=[size[0]/2,size[1]/2,0]

    cam=r.GetActiveCamera()
    cam.SetPosition(xy[0],xy[1],-10.0)
    cam.SetFocalPoint(xy[0],xy[1],0.0)
    cam.SetViewUp(0,1,0)
    cam.SetViewAngle(90)
    cam.ParallelProjectionOff()
    r.ResetCameraClippingRange()
    rw.Render()

    errors = 0

    if debug:
      print('Picking at {}'.format(xy))
    errors += propPick(p,xy,propPickData)
    errors += pointPick(p,xy,pointPickData)
    errors += cellPick(p,xy,cellPickData)

    if debug:
      time.sleep(3)

    return errors


# Run all of the tests defined by pickdata