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scalar multiplication

release/4.3a0
Frank Dellaert 2010-03-03 02:49:06 +00:00
parent 23986349de
commit eec6017b12
2 changed files with 6 additions and 0 deletions
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3
cpp/Point2.h
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@ -51,6 +51,7 @@ namespace gtsam {
inline bool operator ==(const Point2& q) const {return x_==q.x_ && q.y_==q.y_;}
inline Point2 operator + (const Point2& q) const {return Point2(x_+q.x_,y_+q.y_);}
inline Point2 operator - (const Point2& q) const {return Point2(x_-q.x_,y_-q.y_);}
inline Point2 operator * (double s) const {return Point2(x_*s,y_*s);}
inline Point2 operator / (double q) const {return Point2(x_/q,y_/q);}
/** norm of point */
@ -100,5 +101,7 @@ namespace gtsam {
/** "Inverse" - negates each coordinate such that compose(p,inverse(p))=Point2() */
inline Point2 inverse(const Point2& p) { return Point2(-p.x(), -p.y()); }
/** multiply with scalar */
inline Point2 operator*(double s, const Point2& p) {return p*s;}
}

3
cpp/testPoint2.cpp
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@ -26,6 +26,9 @@ TEST( Point2, arithmetic)
CHECK(assert_equal( Point2(-5,-6), -Point2(5,6) ));
CHECK(assert_equal( Point2(5,6), Point2(4,5)+Point2(1,1)));
CHECK(assert_equal( Point2(3,4), Point2(4,5)-Point2(1,1) ));
CHECK(assert_equal( Point2(8,6), Point2(4,3)*2));
CHECK(assert_equal( Point2(4,6), 2*Point2(2,3)));
CHECK(assert_equal( Point2(2,3), Point2(4,6)/2));
}
/* ************************************************************************* */