fltTransformRotateAboutEdge.h

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/**
 * 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 fltTransformRotateAboutEdge.h
 * @author drose
 * @date 2000-08-30
 */

#ifndef FLTTRANSFORMROTATEABOUTEDGE_H
#define FLTTRANSFORMROTATEABOUTEDGE_H

#include "pandatoolbase.h"

#include "fltTransformRecord.h"

/**
 * A transformation that rotates about a particular axis in space, defined by
 * two endpoints.
 */
class FltTransformRotateAboutEdge : public FltTransformRecord {
public:
  FltTransformRotateAboutEdge(FltHeader *header);

  void set(const LPoint3d &point_a, const LPoint3d &point_b, PN_stdfloat angle);

  const LPoint3d &get_point_a() const;
  const LPoint3d &get_point_b() const;
  PN_stdfloat get_angle() const;

private:
  void recompute_matrix();

  LPoint3d _point_a;
  LPoint3d _point_b;
  PN_stdfloat _angle;

protected:
  virtual bool extract_record(FltRecordReader &reader);
  virtual bool build_record(FltRecordWriter &writer) const;

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

private:
  static TypeHandle _type_handle;
};

#endif