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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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* ----------------------------------------------------------------------- */
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/** @file Vec4d.h
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* @brief 4D double vector class.
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*/
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#ifndef __CGLA_VEC4D_H__
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#define __CGLA_VEC4D_H__
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#include "Vec3d.h"
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#include "ArithVec4Float.h"
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namespace CGLA {
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/** \brief A four dimensional floating point vector.
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This class is also used (via typedef) for
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homogeneous vectors.
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*/
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class Vec4d: public ArithVec4Float<double,Vec4d>
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{
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public:
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/// Construct a (0,0,0,0) homogenous Vector
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Vec4d(): ArithVec4Float<double,Vec4d>(0.0,0.0,0.0,0.0) {}
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/// Construct a (0,0,0,0) homogenous Vector
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explicit Vec4d(double _a): ArithVec4Float<double,Vec4d>(_a,_a,_a,_a) {}
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/// Construct a 4D vector
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Vec4d(double _a, double _b, double _c, double _d):
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ArithVec4Float<double,Vec4d>(_a,_b,_c,_d) {}
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/// Construct a homogenous vector (a,b,c,1)
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Vec4d(double _a, double _b, double _c):
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ArithVec4Float<double,Vec4d>(_a,_b,_c,1.0) {}
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/// Construct a homogenous vector from a non-homogenous.
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explicit Vec4d(const Vec3d& v):
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ArithVec4Float<double,Vec4d>(v[0],v[1],v[2],1.0) {}
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/// Construct a homogenous vector from a non-homogenous.
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explicit Vec4d(const Vec3d& v,double _d):
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ArithVec4Float<double,Vec4d>(v[0],v[1],v[2],_d) {}
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operator Vec3d() const
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{
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double k = 1.0/(*this)[3];
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return Vec3d((*this)[0]*k,(*this)[1]*k,(*this)[2]*k);
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}
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};
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}
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#endif
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