Vec3f.cxx

   1 #include <cassert>
   2
   3 #include "Vec3f.hxx"
   4
   5 Vec3f::Vec3f()
   6 {
   7   for(int i = 0; i < 3; ++i)
   8     {
   9       m_values[i] = 0.0f;
  10     }
  11 }
  12
  13 Vec3f::Vec3f(float x, float y, float z)
  14 {
  15   m_values[0] = x;
  16   m_values[1] = y;
  17   m_values[2] = z;
  18 }
  19
  20 Vec3f::~Vec3f()
  21 {
  22 }
  23
  24 Vec3f::Vec3f(const Vec3f& o)
  25 {
  26   for(int i = 0; i < 3; ++i)
  27     {
  28       m_values[i] = o.m_values[i];
  29     }
  30 }
  31
  32 Vec3f&
  33 Vec3f::operator=(const Vec3f& o)
  34 {
  35   if(this != &o)
  36     {
  37       for(int i = 0; i < 3; ++i)
  38         {
  39           m_values[i] = o.m_values[i];
  40         }
  41     }
  42   return *this;
  43 }
  44
  45 float
  46 Vec3f::operator|(const Vec3f& o) const
  47 {
  48   return this->dot(o);
  49 }
  50
  51 float
  52 Vec3f::dot(const Vec3f& o) const
  53 {
  54   float dot = 0.0f;
  55   for(int i = 0; i < 3; ++i)
  56     {
  57       dot += m_values[i]*o.m_values[i];
  58     }
  59   return dot;
  60 }
  61
  62 Vec3f
  63 Vec3f::operator%(const Vec3f& o) const
  64 {
  65   return this->cross(o);
  66 }
  67
  68 Vec3f
  69 Vec3f::cross(const Vec3f& o) const
  70 {
  71   float x = m_values[1]*o.m_values[2] - m_values[2]*o.m_values[1];
  72   float y = m_values[2]*o.m_values[0] - m_values[0]*o.m_values[2];
  73   float z = m_values[0]*o.m_values[1] - m_values[1]*o.m_values[0];
  74
  75   return Vec3f(x,y,z);
  76 }
  77
  78 void
  79 Vec3f::normalize()
  80 {
  81   float norm = this->norm();
  82   *this *= 1.0f/norm;
  83 }
  84
  85 float
  86 Vec3f::norm() const
  87 {
  88   float n = this->dot(*this);
  89   return sqrtf(n);
  90 }
  91
  92 Vec3f
  93 Vec3f::operator*(const float t) const
  94 {
  95   Vec3f v(*this);
  96   return v *= t;
  97 }
  98
  99 Vec3f&
 100 Vec3f::operator*=(const float t)
 101 {
 102   for(int i = 0; i < 3; ++i)
 103     {
 104       m_values[i] *= t;
 105     }
 106   return *this;
 107 }
 108
 109 Vec3f
 110 Vec3f::operator/(const float t) const
 111 {
 112   Vec3f v(*this);
 113   return v /= t;
 114 }
 115
 116 Vec3f&
 117 Vec3f::operator/=(const float t)
 118 {
 119   for(int i = 0; i < 3; ++i)
 120     {
 121       m_values[i] /= t;
 122     }
 123   return *this;
 124 }
 125
 126 // example implementation of a standard operator
 127 Vec3f
 128 Vec3f::operator+(const Vec3f& o) const
 129 {
 130   Vec3f v(*this);
 131
 132   return v += o;
 133 }
 134
 135 // example implementation of an in-place operator
 136 Vec3f&
 137 Vec3f::operator+=(const Vec3f& o)
 138 {
 139   for(unsigned int i = 0; i < 3; ++i)
 140     {
 141       m_values[i] += o.m_values[i];
 142     }
 143
 144   return *this;
 145 }
 146
 147 Vec3f
 148 Vec3f::operator-(const Vec3f& o) const
 149 {
 150   Vec3f v(*this);
 151
 152   return v -= o;
 153 }
 154
 155 Vec3f&
 156 Vec3f::operator-=(const Vec3f& o)
 157 {
 158   for(unsigned int i = 0; i < 3; ++i)
 159     {
 160       m_values[i] -= o.m_values[i];
 161     }
 162   return *this;
 163 }
 164
 165 Vec3f
 166 Vec3f::operator*(const Vec3f& o) const
 167 {
 168   Vec3f v(*this);
 169
 170   return v *= o;
 171 }
 172
 173 Vec3f&
 174 Vec3f::operator*=(const Vec3f& o)
 175 {
 176   for(unsigned int i = 0; i < 3; ++i)
 177     {
 178       m_values[i] *= o.m_values[i];
 179     }
 180   return *this;
 181 }
 182
 183 Vec3f
 184 Vec3f::operator/(const Vec3f& o) const
 185 {
 186   Vec3f v(*this);
 187
 188   return v /= o;
 189 }
 190
 191 Vec3f&
 192 Vec3f::operator/=(const Vec3f& o)
 193 {
 194   for(unsigned int i = 0; i < 3; ++i)
 195     {
 196       m_values[i] /= o.m_values[i];
 197     }
 198   return *this;
 199 }
 200
 201 float
 202 Vec3f::operator[](unsigned int i) const
 203 {
 204   assert( i < 3 );
 205   return m_values[i];
 206 }
 207
 208 float&
 209 Vec3f::operator[](unsigned int i)
 210 {
 211   assert(i < 3);
 212   return m_values[i];
 213 }
 214
 215 void
 216 Vec3f::clamp()
 217 {
 218   for(unsigned int i = 0; i < 3; ++i)
 219     {
 220       if(m_values[i] < 0.0)
 221         m_values[i] = 0.0;
 222       if(m_values[i] > 1.0)
 223         m_values[i] = 1.0;
 224     }
 225 }