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root |
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/* |
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* slow, non-line, small |
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*/ |
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#include "config.h" |
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#include <cmath> |
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#include "matrix.h" |
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double abs(const vec &a) t_no |
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{ return sqrt (a*a); } |
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vec normalize(const vec &a) t_no |
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{ double l = 1 / abs (a); return vec(a[0]*l, a[1]*l, a[2]*l); } |
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vec cross(const vec &a, const vec &b) t_no |
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{ return vec(a[1]*b[2]-a[2]*b[1], |
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a[2]*b[0]-a[0]*b[2], |
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a[0]*b[1]-a[1]*b[0]); } |
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mat operator +(const mat &a, const mat &b) t_no |
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{ return mat(a[0] + b[0], a[1] + b[1], a[2] + b[2]); } |
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mat operator -(const mat &a, const mat &b) t_no |
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{ return mat(a[0] - b[0], a[1] - b[1], a[2] - b[2]); } |
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vec operator *(const mat &a, const vec &b) t_no |
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{ return vec(a[0] * b, a[1] * b, a[2] * b); } |
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vec operator *(const vec &a, const mat &b) t_no |
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{ return vec(a * b(0), a * b(1), a * b(2)); } |
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mat operator *(const mat &a, const mat &b) t_no |
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{ return mat(a[0] * b, a[1] * b, a[2] * b); } |
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ostream &operator <<(ostream &o, const vec &v) t_no |
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{ |
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return o << "[ " << v[0] << ", " |
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<< v[1] << ", " |
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<< v[2] << "]"; |
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} |
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ostream &operator <<(ostream &o, const mat &m) t_no |
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{ |
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return o << "[ " << m[0] << ", " |
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<< m[1] << ", " |
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<< m[2] << "]"; |
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} |
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