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 /// A NRPoint consists of x and y coodinates.
20 /// \todo
21 /// This class appears to be obsoleted out in favour of NR::Point.
22 struct NRPoint {
23 NR::Coord x, y;
24 };
26 namespace NR {
28 class Matrix;
30 /// Cartesian point.
31 class Point {
32 public:
33 inline Point()
34 { _pt[X] = _pt[Y] = 0; }
36 inline Point(Coord x, Coord y) {
37 _pt[X] = x;
38 _pt[Y] = y;
39 }
41 inline Point(NRPoint const &p) {
42 _pt[X] = p.x;
43 _pt[Y] = p.y;
44 }
46 inline Point(Point const &p) {
47 for (unsigned i = 0; i < 2; ++i) {
48 _pt[i] = p._pt[i];
49 }
50 }
52 inline Point &operator=(Point const &p) {
53 for (unsigned i = 0; i < 2; ++i) {
54 _pt[i] = p._pt[i];
55 }
56 return *this;
57 }
59 inline Coord operator[](unsigned i) const {
60 return _pt[i];
61 }
63 inline Coord &operator[](unsigned i) {
64 return _pt[i];
65 }
67 Coord operator[](Dim2 d) const throw() { return _pt[d]; }
68 Coord &operator[](Dim2 d) throw() { return _pt[d]; }
70 /** Return a point like this point but rotated -90 degrees.
71 (If the y axis grows downwards and the x axis grows to the
72 right, then this is 90 degrees counter-clockwise.)
73 **/
74 Point ccw() const {
75 return Point(_pt[Y], -_pt[X]);
76 }
78 /** Return a point like this point but rotated +90 degrees.
79 (If the y axis grows downwards and the x axis grows to the
80 right, then this is 90 degrees clockwise.)
81 **/
82 Point cw() const {
83 return Point(-_pt[Y], _pt[X]);
84 }
86 /**
87 \brief A function to lower the precision of the point
88 \param places The number of decimal places that should be in
89 the final number.
90 */
91 inline void round (int places = 0) {
92 _pt[X] = (Coord)(Inkscape::decimal_round((double)_pt[X], places));
93 _pt[Y] = (Coord)(Inkscape::decimal_round((double)_pt[Y], places));
94 return;
95 }
97 void normalize();
99 inline Point &operator+=(Point const &o) {
100 for ( unsigned i = 0 ; i < 2 ; ++i ) {
101 _pt[i] += o._pt[i];
102 }
103 return *this;
104 }
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/=(double const s) {
114 for ( unsigned i = 0 ; i < 2 ; ++i ) {
115 _pt[i] /= s;
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 Point &operator*=(Matrix const &m);
129 inline int operator == (const Point &in_pnt) {
130 return ((_pt[X] == in_pnt[X]) && (_pt[Y] == in_pnt[Y]));
131 }
133 friend inline std::ostream &operator<< (std::ostream &out_file, const NR::Point &in_pnt);
135 private:
136 Coord _pt[2];
137 };
139 /** A function to print out the Point. It just prints out the coords
140 on the given output stream */
141 inline std::ostream &operator<< (std::ostream &out_file, const NR::Point &in_pnt) {
142 out_file << "X: " << in_pnt[X] << " Y: " << in_pnt[Y];
143 return out_file;
144 }
146 } /* namespace NR */
148 #endif /* !SEEN_NR_POINT_H */
150 /*
151 Local Variables:
152 mode:c++
153 c-file-style:"stroustrup"
154 c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +))
155 indent-tabs-mode:nil
156 fill-column:99
157 End:
158 */
159 // vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:encoding=utf-8:textwidth=99 :