1 #ifndef SEEN_NR_POINT_H
2 #define SEEN_NR_POINT_H
4 /** \file
5 * Cartesian point class.
6 */
8 //#include <math.h>
9 //#include <stdexcept>
10 #include <iostream>
11 //#include <iomanip>
13 #include <libnr/nr-coord.h>
14 #include <libnr/nr-dim2.h>
16 //#include "round.h"
17 #include "decimal-round.h"
19 #include <2geom/point.h>
21 /// A NRPoint consists of x and y coodinates.
22 /// \todo
23 /// This class appears to be obsoleted out in favour of NR::Point.
24 struct NRPoint {
25 NR::Coord x, y;
26 };
28 namespace NR {
30 class Matrix;
32 /// Cartesian point.
33 class Point {
34 public:
35 inline Point()
36 { _pt[X] = _pt[Y] = 0; }
38 inline Point(Coord x, Coord y) {
39 _pt[X] = x;
40 _pt[Y] = y;
41 }
43 inline Point(NRPoint const &p) {
44 _pt[X] = p.x;
45 _pt[Y] = p.y;
46 }
48 inline Point(Point const &p) {
49 for (unsigned i = 0; i < 2; ++i) {
50 _pt[i] = p._pt[i];
51 }
52 }
54 inline Point(Geom::Point const &p) {
55 _pt[X] = p[Geom::X];
56 _pt[Y] = p[Geom::Y];
57 }
59 inline Point &operator=(Point const &p) {
60 for (unsigned i = 0; i < 2; ++i) {
61 _pt[i] = p._pt[i];
62 }
63 return *this;
64 }
66 inline Coord operator[](unsigned i) const {
67 return _pt[i];
68 }
70 inline Coord &operator[](unsigned i) {
71 return _pt[i];
72 }
74 Coord operator[](Dim2 d) const throw() { return _pt[d]; }
75 Coord &operator[](Dim2 d) throw() { return _pt[d]; }
77 /** Return a point like this point but rotated -90 degrees.
78 (If the y axis grows downwards and the x axis grows to the
79 right, then this is 90 degrees counter-clockwise.)
80 **/
81 Point ccw() const {
82 return Point(_pt[Y], -_pt[X]);
83 }
85 /** Return a point like this point but rotated +90 degrees.
86 (If the y axis grows downwards and the x axis grows to the
87 right, then this is 90 degrees clockwise.)
88 **/
89 Point cw() const {
90 return Point(-_pt[Y], _pt[X]);
91 }
93 /**
94 \brief A function to lower the precision of the point
95 \param places The number of decimal places that should be in
96 the final number.
97 */
98 inline void round (int places = 0) {
99 _pt[X] = (Coord)(Inkscape::decimal_round((double)_pt[X], places));
100 _pt[Y] = (Coord)(Inkscape::decimal_round((double)_pt[Y], places));
101 return;
102 }
104 void normalize();
106 inline Point &operator+=(Point const &o) {
107 for ( unsigned i = 0 ; i < 2 ; ++i ) {
108 _pt[i] += o._pt[i];
109 }
110 return *this;
111 }
113 inline Point &operator-=(Point const &o) {
114 for ( unsigned i = 0 ; i < 2 ; ++i ) {
115 _pt[i] -= o._pt[i];
116 }
117 return *this;
118 }
120 inline Point &operator/=(double const s) {
121 for ( unsigned i = 0 ; i < 2 ; ++i ) {
122 _pt[i] /= s;
123 }
124 return *this;
125 }
127 inline Point &operator*=(double const s) {
128 for ( unsigned i = 0 ; i < 2 ; ++i ) {
129 _pt[i] *= s;
130 }
131 return *this;
132 }
134 Point &operator*=(Matrix const &m);
136 inline int operator == (const Point &in_pnt) {
137 return ((_pt[X] == in_pnt[X]) && (_pt[Y] == in_pnt[Y]));
138 }
140 friend inline std::ostream &operator<< (std::ostream &out_file, const NR::Point &in_pnt);
142 inline Geom::Point to_2geom() const {
143 return Geom::Point(_pt[X], _pt[Y]);
144 }
146 private:
147 Coord _pt[2];
148 };
150 /** A function to print out the Point. It just prints out the coords
151 on the given output stream */
152 inline std::ostream &operator<< (std::ostream &out_file, const NR::Point &in_pnt) {
153 out_file << "X: " << in_pnt[X] << " Y: " << in_pnt[Y];
154 return out_file;
155 }
157 } /* namespace NR */
159 #endif /* !SEEN_NR_POINT_H */
161 /*
162 Local Variables:
163 mode:c++
164 c-file-style:"stroustrup"
165 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
166 indent-tabs-mode:nil
167 fill-column:99
168 End:
169 */
170 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :