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-/*
- * lens.h -- ePiX::Lens interface ans implementations
- *
- * This file is part of ePiX, a C++ library for creating high-quality
- * figures in LaTeX
- *
- * Version 1.1.21
- * Last Change: September 22, 2007
- *
- *
- * Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007
- * Andrew D. Hwang <rot 13 nujnat at zngupf dot ubylpebff dot rqh>
- * Department of Mathematics and Computer Science
- * College of the Holy Cross
- * Worcester, MA, 01610-2395, USA
- *
- *
- * ePiX is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * ePiX is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
- * License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with ePiX; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-#ifndef EPIX_LENS
-#define EPIX_LENS
-
-namespace ePiX {
-
- class frame;
- class P;
- class pair;
-
- class Lens {
- public:
- // lens map(arg, orient, viewpt, distance)
- virtual pair operator() (const P&,
- const frame&, const P&, double) const = 0;
- virtual bool is_linear() const = 0; // lens preserves lines?
- virtual bool needs_clip() const = 0; // lens needs scene pre-clipping?
- virtual ~Lens();
- virtual Lens* clone() const = 0;
- }; // end of class Lens
-
-
- // actual lenses
- class Perspective : public Lens {
- public:
- pair operator()
- (const P&, const frame&, const P&, double) const;
-
- bool is_linear() const;
- bool needs_clip() const;
- Perspective* clone() const;
- }; // end of class Perspective
-
-
- class Orthog : public Lens {
- public:
- pair operator()
- (const P&, const frame&, const P&, double) const;
-
- bool is_linear() const;
- bool needs_clip() const;
- Orthog* clone() const;
- }; // end of class Orthog
-
-
- class Fisheye : public Lens {
- public:
- pair operator()
- (const P&, const frame&, const P&, double) const;
-
- bool is_linear() const;
- bool needs_clip() const;
- Fisheye* clone() const;
- }; // end of class Fisheye
-
-
- class Bubble : public Lens {
- public:
- pair operator()
- (const P&, const frame&, const P&, double) const;
-
- bool is_linear() const;
- bool needs_clip() const;
- Bubble* clone() const;
- }; // end of class Bubble
-
-} // end of namespace
-
-#endif /* EPIX_LENS */