1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
|
/*
* 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 */
|
