/**
 * PANDA 3D SOFTWARE
 * Copyright (c) Carnegie Mellon University.  All rights reserved.
 *
 * All use of this software is subject to the terms of the revised BSD
 * license.  You should have received a copy of this license along
 * with this source code in a file named "LICENSE."
 *
 * @file lensNode.I
 * @author drose
 * @date 2002-02-26
 */

/**
 * Sets up the LensNode using a copy of the indicated Lens.  If the original
 * Lens is changed or destroyed, this LensNode is not affected.
 */
INLINE void LensNode::
copy_lens(const Lens &lens) {
  return copy_lens(0, lens);
}

/**
 * Copies the indicated lens into the specified slot.
 */
INLINE void LensNode::
copy_lens(int index, const Lens &lens) {
  set_lens(index, lens.make_copy());
}

/**
 * Sets up the LensNode using this particular Lens pointer.  If the lens is
 * subsequently modified, the LensNode properties immediately reflect the
 * change.
 */
INLINE void LensNode::
set_lens(Lens *lens) {
  return set_lens(0, lens);
}

/**
 * Returns a pointer to the particular Lens associated with this LensNode, or
 * NULL if there is not yet a Lens associated.  If an index number is
 * specified, returns the nth lens.
 */
INLINE Lens *LensNode::
get_lens(int index) const {
  nassertr(index >= 0 && index < max_lenses, nullptr); // Sanity check

  if (index < (int)_lenses.size()) {
    return _lenses[index]._lens;
  }
  return nullptr;
}

/**
 * Returns the active flag for the nth lens.
 */
INLINE bool LensNode::
get_lens_active(int index) const {
  nassertr(index >= 0 && index < max_lenses, false);

  if (index < (int)_lenses.size()) {
    return _lenses[index]._is_active;
  }
  return false;
}

/**
 * An alternate way to call set_lens_active(index, true).
 */
INLINE bool LensNode::
activate_lens(int index) {
  return set_lens_active(index, true);
}

/**
 * An alternate way to call set_lens_active(index, false).
 */
INLINE bool LensNode::
deactivate_lens(int index) {
  return set_lens_active(index, false);
}

/**
 * Returns true if the given point is within the bounds of the lens of the
 * LensNode (i.e.  if the camera can see the point).
 */
INLINE bool LensNode::
is_in_view(const LPoint3 &pos) {
  return is_in_view(0, pos);
}