vgl_bounding_box.hxx

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#include "vgl_bounding_box.h"
#include "vgl_sphere_3d.h"
#include "vgl_pointset_3d.h"
#include "vgl_cubic_spline_3d.h"
#include "vgl_box_3d.h"

template <class T>
vgl_box_3d<T>  vgl_bounding_box(vgl_sphere_3d<T> const& sph){
  T r = sph.radius();
  vgl_point_3d<T> c = sph.centre();
  T cx = c.x(), cy = c.y(), cz = c.z();
  vgl_point_3d<T> p0(cx-r, cy-r, cz-r);
  vgl_point_3d<T> p1(cx+r, cy+r, cz+r);
  vgl_box_3d<T> bb;
  bb.add(p0); bb.add(p1);
  return bb;
}

template <class T>
vgl_box_3d<T>  vgl_bounding_box(vgl_pointset_3d<T> const& ptset){
  unsigned n = ptset.npts();
  vgl_box_3d<T> bb;
  for(unsigned i=0; i<n; i++)
    bb.add(ptset.p(i));
  return bb;
}

template <class T>
vgl_box_3d<T>  vgl_bounding_box(vgl_cubic_spline_3d<T> const& spline){
  vgl_box_3d<T> ret;
  std::vector<vgl_point_3d<T> > knots = spline.knots();
  for(typename std::vector<vgl_point_3d<T> >::const_iterator kit = knots.begin();
      kit != knots.end(); ++kit)
    ret.add(*kit);
  return ret;
}

#define VGL_BOUNDING_BOX_INSTANTIATE(T) \
template vgl_box_3d<T> vgl_bounding_box(vgl_sphere_3d<T> const&); \
template vgl_box_3d<T> vgl_bounding_box(vgl_pointset_3d<T> const&); \
template vgl_box_3d<T> vgl_bounding_box(vgl_cubic_spline_3d<T> const&)