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/* |
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* matrix calculations for non-homogenous space.. |
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*/ |
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#ifndef MATRIX_H |
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#define MATRIX_H |
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#include <iostream> |
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#include "util.h" |
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using namespace std; |
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class vec { |
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double data[3]; |
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public: |
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vec() t_no {}; |
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vec(double a, double b, double c) t_no |
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{ data[0] = a; data[1] = b; data[2] = c; }; |
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double &operator [](int idx) t_no { return data[idx]; }; |
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const double &operator [](int idx) const t_no { return data[idx]; }; |
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}; |
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inline bool operator ==(const vec &a, const vec &b) t_no |
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{ return a[0] == b[0] && a[1] == b[1] && a[2] == b[2]; } |
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inline vec operator +(const vec &a, const vec &b) t_no |
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{ return vec(a[0] + b[0], a[1] + b[1], a[2] + b[2]); } |
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inline vec operator -(const vec &a, const vec &b) t_no |
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{ return vec(a[0] - b[0], a[1] - b[1], a[2] - b[2]); } |
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inline double operator *(const vec &a, const vec &b) t_no |
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{ return a[0] * b[0] + a[1] * b[1] + a[2] * b[2]; } |
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inline vec operator *(double s, const vec &a) t_no |
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{ return vec(s * a[0], s * a[1], s * a[2]); } |
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double abs(const vec &a) t_no; |
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vec normalize(const vec &a) t_no; |
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vec cross(const vec &a, const vec &b) t_no; |
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class mat { |
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vec data[3]; |
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public: |
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mat() t_no {}; |
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mat(vec a, vec b, vec c) t_no |
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{ data[0] = a; data[1] = b; data[2] = c; }; |
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vec &row(int y) t_no { return data[y]; }; |
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const vec &row(int y) const t_no { return data[y]; }; |
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vec &operator [](int y) t_no { return row(y); }; |
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const vec &operator [](int y) const t_no { return row(y); }; |
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vec col(int x) t_no { return vec(data[0][x], data[1][x], data[2][x]); }; |
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const vec col(int x) const t_no { return vec(data[0][x], data[1][x], data[2][x]); }; |
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vec operator ()(int x) t_no { return col(x); }; |
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const vec operator ()(int x) const t_no { return col(x); }; |
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}; |
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mat operator +(const mat &a, const mat &b) t_no; |
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mat operator -(const mat &a, const mat &b) t_no; |
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vec operator *(const mat &a, const vec &b) t_no; |
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vec operator *(const vec &a, const mat &b) t_no; |
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mat operator *(const mat &a, const mat &b) t_no; |
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ostream &operator <<(ostream &o, const vec &v) t_no; |
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ostream &operator <<(ostream &o, const mat &m) t_no; |
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#endif |
