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panda/src/distort/pSphereLens.h

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// Filename: pSphereLens.h
// Created by:  drose (12Dec01)
//
////////////////////////////////////////////////////////////////////
//
// PANDA 3D SOFTWARE
// Copyright (c) 2001, Disney Enterprises, Inc.  All rights reserved
//
// All use of this software is subject to the terms of the Panda 3d
// Software license.  You should have received a copy of this license
// along with this source code; you will also find a current copy of
// the license at http://www.panda3d.org/license.txt .
//
// To contact the maintainers of this program write to
// panda3d@yahoogroups.com .
//
////////////////////////////////////////////////////////////////////

#ifndef PSPHERELENS_H
#define PSPHERELENS_H

#include "pandabase.h"

#include "lens.h"

////////////////////////////////////////////////////////////////////
//       Class : PSphereLens
// Description : A PSphereLens is a special nonlinear lens that
//               doesn't correspond to any real physical lenses.  It's
//               primarily useful for generating 360-degree wraparound
//               images while avoiding the distortion associated with
//               fisheye images.
//
//               A PSphereLens is similar to a cylindrical lens,
//               except it is also curved in the vertical direction.
//               This allows it to extend to both poles in the
//               vertical direction.  The mapping is similar to what
//               many modeling packages call a sphere mapping: the x
//               coordinate is proportional to azimuth, while the y
//               coordinate is proportional to altitude.
////////////////////////////////////////////////////////////////////
class EXPCL_PANDAFX PSphereLens : public Lens {
PUBLISHED:
  INLINE PSphereLens();

public:
  INLINE PSphereLens(const PSphereLens &copy);
  INLINE void operator = (const PSphereLens &copy);

public:
  virtual PT(Lens) make_copy() const;

protected:
  virtual bool extrude_impl(const LPoint3f &point2d,
                            LPoint3f &near_point, LPoint3f &far_point) const;
  virtual bool project_impl(const LPoint3f &point3d, LPoint3f &point2d) const;

  virtual float fov_to_film(float fov, float focal_length, bool horiz) const;
  virtual float fov_to_focal_length(float fov, float film_size, bool horiz) const;
  virtual float film_to_fov(float film_size, float focal_length, bool horiz) 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() {
    Lens::init_type();
    register_type(_type_handle, "PSphereLens",
                  Lens::get_class_type());
  }

private:
  static TypeHandle _type_handle;
};

#include "pSphereLens.I"

#endif

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