viewport->GetVTKWindow()->GetMTime() > this->BuildTime))
{
// if the viewport has changed we may - or may not need
- // to rebuild, it depends on if the projected coords chage
+ // to rebuild, it depends on if the projected coords change
int *barOrigin;
barOrigin = this->PositionCoordinate->GetComputedViewportValue(viewport);
size[0] =