include/dxsdk/d3dvec.inl

   1
   2 #include <math.h>
   3
   4
   5 inline _D3DVECTOR::_D3DVECTOR(D3DVALUE f)
   6 {
   7   x = y = z = f;
   8 }
   9
  10 inline
  11 _D3DVECTOR::_D3DVECTOR(D3DVALUE _x, D3DVALUE _y, D3DVALUE _z)
  12 {
  13   x = _x;
  14   y = _y;
  15   z = _z;
  16 }
  17
  18 inline _D3DVECTOR::_D3DVECTOR(const D3DVALUE f[3])
  19 {
  20   x = f[0];
  21   y = f[1];
  22   z = f[2];
  23 }
  24
  25 inline const D3DVALUE& _D3DVECTOR::operator[](int i) const
  26 {
  27   return (&x)[i];
  28 }
  29
  30 inline D3DVALUE& _D3DVECTOR::operator[](int i)
  31 {
  32   return (&x)[i];
  33 }
  34
  35 inline _D3DVECTOR& _D3DVECTOR::operator += (const _D3DVECTOR& v)
  36 {
  37   x += v.x;
  38   y += v.y;
  39   z += v.z;
  40   return *this;
  41 }
  42
  43 inline _D3DVECTOR& _D3DVECTOR::operator -= (const _D3DVECTOR& v)
  44 {
  45   x -= v.x;
  46   y -= v.y;
  47   z -= v.z;
  48   return *this;
  49 }
  50
  51 inline _D3DVECTOR& _D3DVECTOR::operator *= (const _D3DVECTOR& v)
  52 {
  53   x *= v.x;
  54   y *= v.y;
  55   z *= v.z;
  56   return *this;
  57 }
  58
  59 inline _D3DVECTOR& _D3DVECTOR::operator /= (const _D3DVECTOR& v)
  60 {
  61   x /= v.x;
  62   y /= v.y;
  63   z /= v.z;
  64   return *this;
  65 }
  66
  67 inline _D3DVECTOR& _D3DVECTOR::operator *= (D3DVALUE s)
  68 {
  69   x *= s;
  70   y *= s;
  71   z *= s;
  72   return *this;
  73 }
  74
  75 inline _D3DVECTOR& _D3DVECTOR::operator /= (D3DVALUE s)
  76 {
  77   x /= s;
  78   y /= s;
  79   z /= s;
  80    return *this;
  81 }
  82
  83 inline _D3DVECTOR operator + (const _D3DVECTOR& v)
  84 {
  85   return v;
  86 }
  87
  88 inline _D3DVECTOR operator - (const _D3DVECTOR& v)
  89 {
  90   return _D3DVECTOR(-v.x, -v.y, -v.z);
  91 }
  92
  93 inline _D3DVECTOR operator + (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
  94 {
  95   return _D3DVECTOR(v1.x+v2.x, v1.y+v2.y, v1.z+v2.z);
  96 }
  97
  98 inline _D3DVECTOR operator - (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
  99 {
 100   return _D3DVECTOR(v1.x-v2.x, v1.y-v2.y, v1.z-v2.z);
 101 }
 102
 103 inline _D3DVECTOR operator * (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
 104 {
 105   return _D3DVECTOR(v1.x*v2.x, v1.y*v2.y, v1.z*v2.z);
 106 }
 107
 108 inline _D3DVECTOR operator / (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
 109 {
 110   return _D3DVECTOR(v1.x/v2.x, v1.y/v2.y, v1.z/v2.z);
 111 }
 112
 113 inline int operator < (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
 114 {
 115   return v1[0] < v2[0] && v1[1] < v2[1] && v1[2] < v2[2];
 116 }
 117
 118 inline int operator <= (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
 119 {
 120   return v1[0] <= v2[0] && v1[1] <= v2[1] && v1[2] <= v2[2];
 121 }
 122
 123 inline _D3DVECTOR operator * (const _D3DVECTOR& v, D3DVALUE s)
 124 {
 125   return _D3DVECTOR(s*v.x, s*v.y, s*v.z);
 126 }
 127
 128 inline _D3DVECTOR operator * (D3DVALUE s, const _D3DVECTOR& v)
 129 {
 130   return _D3DVECTOR(s*v.x, s*v.y, s*v.z);
 131 }
 132
 133 inline _D3DVECTOR operator / (const _D3DVECTOR& v, D3DVALUE s)
 134 {
 135   return _D3DVECTOR(v.x/s, v.y/s, v.z/s);
 136 }
 137
 138 inline int operator == (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
 139 {
 140   return v1.x==v2.x && v1.y==v2.y && v1.z == v2.z;
 141 }
 142
 143 inline D3DVALUE Magnitude (const _D3DVECTOR& v)
 144 {
 145   return (D3DVALUE) sqrt(SquareMagnitude(v));
 146 }
 147
 148 inline D3DVALUE SquareMagnitude (const _D3DVECTOR& v)
 149 {
 150   return v.x*v.x + v.y*v.y + v.z*v.z;
 151 }
 152
 153 inline _D3DVECTOR Normalize (const _D3DVECTOR& v)
 154 {
 155   return v / Magnitude(v);
 156 }
 157
 158 inline D3DVALUE Min (const _D3DVECTOR& v)
 159 {
 160   D3DVALUE ret = v.x;
 161   if (v.y < ret)
 162       ret = v.y;
 163
 164   if (v.z < ret)
 165       ret = v.z;
 166
 167   return ret;
 168 }
 169
 170 inline D3DVALUE Max (const _D3DVECTOR& v)
 171 {
 172   D3DVALUE ret = v.x;
 173   if (ret < v.y)
 174       ret = v.y;
 175
 176   if (ret < v.z)
 177       ret = v.z;
 178
 179   return ret;
 180 }
 181
 182 inline _D3DVECTOR Minimize (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
 183 {
 184   return _D3DVECTOR( v1[0] < v2[0] ? v1[0] : v2[0],
 185                      v1[1] < v2[1] ? v1[1] : v2[1],
 186                      v1[2] < v2[2] ? v1[2] : v2[2]);
 187 }
 188
 189 inline _D3DVECTOR Maximize (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
 190 {
 191   return _D3DVECTOR( v1[0] > v2[0] ? v1[0] : v2[0],
 192                      v1[1] > v2[1] ? v1[1] : v2[1],
 193                      v1[2] > v2[2] ? v1[2] : v2[2]);
 194 }
 195
 196 inline D3DVALUE DotProduct (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
 197 {
 198   return v1.x*v2.x + v1.y * v2.y + v1.z*v2.z;
 199 }
 200
 201 inline _D3DVECTOR CrossProduct (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
 202 {
 203   _D3DVECTOR result;
 204   result[0] = v1[1] * v2[2] - v1[2] * v2[1];
 205   result[1] = v1[2] * v2[0] - v1[0] * v2[2];
 206   result[2] = v1[0] * v2[1] - v1[1] * v2[0];
 207
 208   return result;
 209 }
 210
 211 inline _D3DMATRIX operator* (const _D3DMATRIX& a, const _D3DMATRIX& b)
 212 {
 213   _D3DMATRIX ret;
 214   for (int i=0; i<4; i++)
 215   {
 216     for (int j=0; j<4; j++)
 217     {
 218       ret(i, j) = 0.0f;
 219       for (int k=0; k<4; k++)
 220       {
 221         ret(i, j) += a(i, k) * b(k, j);
 222       }
 223     }
 224 }
 225   return ret;
 226 }
 227