vec2f

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// Copyright (C) 2010, Guy Barrand. All rights reserved.
// See the file tools.license for terms.
 
#ifndef tools_vec2f
#define tools_vec2f
 
#include "vec2"
#include "../S_STRING"
#include <cmath>
 
namespace tools {
 
class vec2f : public vec2<float> {
  typedef vec2<float> parent;
public:
  TOOLS_SCLASS(tools::vec2f) //for stype()
public:
  vec2f():parent(){}
  vec2f(const float a_vec[2]):parent(a_vec){}
  vec2f(float a0,float a1):parent(a0,a1){}
  virtual ~vec2f() {}
public:
  vec2f(const vec2f& a_from): parent(a_from){}
  vec2f& operator=(const vec2f& a_from){
    parent::operator=(a_from);
    return *this;
  }
 
  vec2f(const parent& a_from):parent(a_from){}
 
public: //operators
  vec2f operator*(float a_v) const {
    return vec2f(m_data[0]*a_v,
                 m_data[1]*a_v);
  }
  vec2f operator+(const vec2f& a_v) const {
    return vec2f(m_data[0]+a_v.m_data[0],
                 m_data[1]+a_v.m_data[1]);
  }
  vec2f operator-(const vec2f& a_v) const {
    return vec2f(m_data[0]-a_v.m_data[0],
                 m_data[1]-a_v.m_data[1]);
  }
  vec2f& operator+=(const vec2f& a_v) {
    m_data[0] += a_v.m_data[0];
    m_data[1] += a_v.m_data[1];
    return *this;
  }
  vec2f& operator*=(float a_v) {
    m_data[0] *= a_v;
    m_data[1] *= a_v;
    return *this;
  }
  vec2f operator-() const {
    return vec2f(-m_data[0],-m_data[1]);
  }
public:
#define TOOLS_VEC2F_MORE_PREC
#ifdef TOOLS_VEC2F_MORE_PREC
  float length() const {
    return float(::sqrt(m_data[0]*m_data[0]+m_data[1]*m_data[1]));
  }
  float normalize() {
    float norme = length();
    if(!norme) return 0;
    divide(norme);
    return norme;
  }
#else
  float length() const {return parent::length(::sqrtf);}
  float normalize() {return parent::normalize(::sqrtf);}
#endif
public: //iv2sg
  bool equals(const vec2f& a_v,const float a_epsil) const {
    //if(a_epsil<0.0f))
    float d0 = m_data[0]-a_v.m_data[0];
    float d1 = m_data[1]-a_v.m_data[1];
    return ((d0*d0+d1*d1)<=a_epsil);
  }
  void negate() {
    m_data[0] = -m_data[0];
    m_data[1] = -m_data[1];
  }
 
private:static void check_instantiation() {vec2f v(0,0);v.set_value(1,1);}
};
 
inline vec2f operator*(float a_f,const vec2f& a_v) {
  vec2f res(a_v);
  res *= a_f;
  return res;
}
 
}
 
#include <vector>
 
namespace tools {
 
#ifndef SWIG
//for sf, mf :
inline bool set_from_vec(vec2f& a_v,const std::vector<float>& a_sv) {
  if(a_sv.size()!=2) return false;
  a_v[0] = a_sv[0];
  a_v[1] = a_sv[1];
  return true;
}
#endif
 
}
 
#endif