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/* ----------------------------------------------------------------------- *
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* This file is part of GEL, http://www.imm.dtu.dk/GEL
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* Copyright (C) the authors and DTU Informatics
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* For license and list of authors, see ../../doc/intro.pdf
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* @brief Abstract 2D floating point vector class
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* ----------------------------------------------------------------------- */
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/** @file ArithVec2Float.h
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* @brief Abstract 2D floating point vector class
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*/
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#ifndef __CGLA__ARITHVEC2FLOAT_H__
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#define __CGLA__ARITHVEC2FLOAT_H__
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#include "ArithVecFloat.h"
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namespace CGLA {
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template<class T, class V>
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class ArithVec2Float: public ArithVecFloat<T,V,2>
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{
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public:
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/// Construct a 2D float vector.
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ArithVec2Float(T a, T b): ArithVecFloat<T,V,2>(a,b) {}
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/// Construct a 2D float vector.
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ArithVec2Float() {}
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};
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/// Returns normalized vector
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template<class T, class V>
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inline V normalize(const ArithVec2Float<T,V>& v)
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{
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return v/v.length();
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}
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/// Rotates vector 90 degrees to obtain orthogonal vector
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template<class T, class V>
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inline V orthogonal(const ArithVec2Float<T,V>& v)
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{
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return V(-v[1],v[0]);
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}
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// Computes (scalar) cross product from two vectors
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template<class T, class V>
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inline T cross(const ArithVec2Float<T,V>& a,
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const ArithVec2Float<T,V>& b)
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{
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return a[0]*b[1]-a[1]*b[0];
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}
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/** The two last (scalar) arguments are the linear combination of
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the two first arguments (vectors) which produces the third argument.
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*/
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template<class T, class V>
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bool linear_combine(const ArithVec2Float<T,V>& a,
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const ArithVec2Float<T,V>& b,
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const ArithVec2Float<T,V>& c,
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T&,
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T&);
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}
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#endif
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