/**
 * 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 cConstrainPosInterval.h
 * @author pratt
 * @date 2006-09-29
 */

#ifndef CCONSTRAINPOSINTERVAL_H
#define CCONSTRAINPOSINTERVAL_H

#include "directbase.h"
#include "cConstraintInterval.h"
#include "nodePath.h"
#include "lvecBase3.h"

/**
 * A constraint interval that will constrain the position of one node to the
 * position of another.
 */
class EXPCL_DIRECT_INTERVAL CConstrainPosInterval : public CConstraintInterval {
PUBLISHED:
  explicit CConstrainPosInterval(const std::string &name, double duration,
                                 const NodePath &node, const NodePath &target,
                                 bool wrt, const LVecBase3 posOffset=LVector3::zero());

  INLINE const NodePath &get_node() const;
  INLINE const NodePath &get_target() const;

  virtual void priv_step(double t);
  virtual void output(std::ostream &out) const;

private:
  NodePath _node;
  NodePath _target;
  bool _wrt;
  LVecBase3 _posOffset;

public:
  static TypeHandle get_class_type() {
    return _type_handle;
  }
  static void init_type() {
    CConstraintInterval::init_type();
    register_type(_type_handle, "CConstrainPosInterval",
                  CConstraintInterval::get_class_type());
  }
  virtual TypeHandle get_type() const {
    return get_class_type();
  }
  virtual TypeHandle force_init_type() {init_type(); return get_class_type();}

private:
  static TypeHandle _type_handle;
};

#include "cConstrainPosInterval.I"

#endif