summaryrefslogtreecommitdiffstats
path: root/libdimensionxx/dimensionxx/geometry.hpp
blob: 63a666b0b336b58adc6f28278184fec551c451fd (plain)
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
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
/*************************************************************************
 * Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com>               *
 *                                                                       *
 * This file is part of The Dimension Library.                           *
 *                                                                       *
 * The Dimension Library is free software; you can redistribute it and/  *
 * or modify it under the terms of the GNU Lesser General Public License *
 * as published by the Free Software Foundation; either version 3 of the *
 * License, or (at your option) any later version.                       *
 *                                                                       *
 * The Dimension Library 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  *
 * Lesser General Public License for more details.                       *
 *                                                                       *
 * You should have received a copy of the GNU Lesser General Public      *
 * License along with this program.  If not, see                         *
 * <http://www.gnu.org/licenses/>.                                       *
 *************************************************************************/

#ifndef DIMENSIONXX_GEOMETRY_HPP
#define DIMENSIONXX_GEOMETRY_HPP

// Wrappers for geometric types (Vectors, Matricies, Lines (rays)).

#include <dimension.h>

namespace Dimension
{
  // Wrapper for dmnsn_matrix
  class Matrix
  {
  public:
    Matrix() { }
    Matrix(double a0, double a1, double a2, double a3,
           double b0, double b1, double b2, double b3,
           double c0, double c1, double c2, double c3,
           double d0, double d1, double d2, double d3)
      : m_matrix(dmnsn_matrix_construct(a0, a1, a2, a3,
                                        b0, b1, b2, b3,
                                        c0, c1, c2, c3,
                                        d0, d1, d2, d3)) { }
    explicit Matrix(dmnsn_matrix m) : m_matrix(m) { }
    // Matrix(const Matrix& m);
    // ~Matrix();

    // Element access
    double* operator[](unsigned int i) { return m_matrix.n[i]; }

    // Matrix arithmetic

    // Matrix& operator=(const Matrix& rhs);
    Matrix& operator*=(const Matrix& rhs)
      { m_matrix = dmnsn_matrix_mul(rhs.m_matrix, m_matrix); return *this; }

    // Get the wrapped matrix
    dmnsn_matrix dmnsn() const { return m_matrix; }

  private:
    dmnsn_matrix m_matrix;
  };

  // Wrapper for dmnsn_vector
  class Vector
  {
  public:
    Vector() { }
    Vector(double x, double y, double z)
      : m_vector(dmnsn_vector_construct(x, y, z)) { }
    explicit Vector(dmnsn_vector v) : m_vector(v) { }
    // Vector(const Vector& v);
    // ~Vector();

    // Get the x, y, and z components.
    double x() const { return m_vector.x; }
    double y() const { return m_vector.y; }
    double z() const { return m_vector.z; }

    // Vector arithmetic

    // Vector& operator=(const Vector& rhs);
    Vector& operator+=(const Vector& rhs)
      { m_vector = dmnsn_vector_add(m_vector, rhs.m_vector); return *this; }
    Vector& operator-=(const Vector& rhs)
      { m_vector = dmnsn_vector_sub(m_vector, rhs.m_vector); return *this; }
    Vector& operator*=(double rhs)
      { m_vector = dmnsn_vector_mul(rhs, m_vector); return *this; }
    Vector& operator*=(const Matrix& m)
      { m_vector = dmnsn_matrix_vector_mul(m.dmnsn(), m_vector); return *this; }
    Vector& operator/=(double rhs)
      { m_vector = dmnsn_vector_div(m_vector, rhs); return *this; }

    // Get the wrapped vector
    dmnsn_vector dmnsn() const { return m_vector; }

  private:
    dmnsn_vector m_vector;
  };

  // Wrapper for dmnsn_line
  class Line
  {
  public:
    Line() { }
    Line(const Vector& x0, const Vector& n)
      { m_line.x0 = x0.dmnsn(); m_line.n = n.dmnsn(); }
    // Line(const Line& l);
    // ~Line();

    Vector x0() const { return Vector(m_line.x0); }
    Vector n()  const { return Vector(m_line.n); }
    double t(const Vector& v) { return dmnsn_line_index(m_line, v.dmnsn()); }

    // Line& operator=(const Line& l);
    Line& operator*=(const Matrix& m)
      { m_line = dmnsn_matrix_line_mul(m.dmnsn(), m_line); return *this; }

    // Get the point `t' on the line (x0 + t*n)
    Vector operator()(double t) { return Vector(dmnsn_line_point(m_line, t)); }

    // Get the wrapped line
    dmnsn_line dmnsn() const { return m_line; }

  private:
    dmnsn_line m_line;
  };

  // Vector operators

  inline Vector
  operator+(const Vector& lhs, const Vector& rhs)
  {
    Vector r = lhs;
    r += rhs;
    return r;
  }

  inline Vector
  operator-(const Vector& lhs, const Vector& rhs)
  {
    Vector r = lhs;
    r -= rhs;
    return r;
  }

  inline Vector
  operator*(const Vector& lhs, double rhs)
  {
    Vector r = lhs;
    r *= rhs;
    return r;
  }

  inline Vector
  operator*(double lhs, const Vector& rhs)
  {
    Vector r = rhs;
    r *= lhs;
    return r;
  }

  inline Vector
  operator*(const Matrix& lhs, const Vector& rhs)
  {
    Vector r = rhs;
    r *= lhs;
    return r;
  }

  inline Vector
  operator/(const Vector& lhs, double rhs)
  {
    Vector r = lhs;
    r /= rhs;
    return r;
  }

  // Dot product
  inline double
  dot(const Vector& lhs, const Vector& rhs)
  {
    return dmnsn_vector_dot(lhs.dmnsn(), rhs.dmnsn());
  }

  // Cross product
  inline Vector
  cross(const Vector& lhs, const Vector& rhs)
  {
    return Vector(dmnsn_vector_cross(lhs.dmnsn(), rhs.dmnsn()));
  }

  // Line transformation
  inline Line
  operator*(const Matrix& lhs, const Line& rhs)
  {
    Line r = rhs;
    r *= lhs;
    return r;
  }
}

#endif /* DIMENSIONXX_GEOMETRY_HPP */