diff --git a/reactos/include/dxsdk/d3dvec.inl b/reactos/include/dxsdk/d3dvec.inl
new file mode 100644
index 00000000000..922c36ea462
--- /dev/null
+++ b/reactos/include/dxsdk/d3dvec.inl
@@ -0,0 +1,227 @@
+
+#include <math.h>
+
+
+inline _D3DVECTOR::_D3DVECTOR(D3DVALUE f)
+{
+  x = y = z = f;
+}
+
+inline
+_D3DVECTOR::_D3DVECTOR(D3DVALUE _x, D3DVALUE _y, D3DVALUE _z)
+{
+  x = _x;
+  y = _y;
+  z = _z;
+}
+
+inline _D3DVECTOR::_D3DVECTOR(const D3DVALUE f[3])
+{
+  x = f[0];
+  y = f[1];
+  z = f[2];
+}
+
+inline const D3DVALUE& _D3DVECTOR::operator[](int i) const
+{
+  return (&x)[i];
+}
+
+inline D3DVALUE& _D3DVECTOR::operator[](int i)
+{
+  return (&x)[i];
+}
+
+inline _D3DVECTOR& _D3DVECTOR::operator += (const _D3DVECTOR& v)
+{
+  x += v.x;
+  y += v.y;
+  z += v.z;
+  return *this;
+}
+
+inline _D3DVECTOR& _D3DVECTOR::operator -= (const _D3DVECTOR& v)
+{
+  x -= v.x;
+  y -= v.y;
+  z -= v.z;
+  return *this;
+}
+
+inline _D3DVECTOR& _D3DVECTOR::operator *= (const _D3DVECTOR& v)
+{
+  x *= v.x;
+  y *= v.y;
+  z *= v.z;
+  return *this;
+}
+
+inline _D3DVECTOR& _D3DVECTOR::operator /= (const _D3DVECTOR& v)
+{
+  x /= v.x;
+  y /= v.y;
+  z /= v.z;
+  return *this;
+}
+
+inline _D3DVECTOR& _D3DVECTOR::operator *= (D3DVALUE s)
+{
+  x *= s;
+  y *= s;
+  z *= s;
+  return *this;
+}
+
+inline _D3DVECTOR& _D3DVECTOR::operator /= (D3DVALUE s)
+{
+  x /= s;
+  y /= s;
+  z /= s;
+   return *this;
+}
+
+inline _D3DVECTOR operator + (const _D3DVECTOR& v)
+{
+  return v;
+}
+
+inline _D3DVECTOR operator - (const _D3DVECTOR& v)
+{
+  return _D3DVECTOR(-v.x, -v.y, -v.z);
+}
+
+inline _D3DVECTOR operator + (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
+{
+  return _D3DVECTOR(v1.x+v2.x, v1.y+v2.y, v1.z+v2.z);
+}
+
+inline _D3DVECTOR operator - (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
+{
+  return _D3DVECTOR(v1.x-v2.x, v1.y-v2.y, v1.z-v2.z);
+}
+
+inline _D3DVECTOR operator * (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
+{
+  return _D3DVECTOR(v1.x*v2.x, v1.y*v2.y, v1.z*v2.z);
+}
+
+inline _D3DVECTOR operator / (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
+{
+  return _D3DVECTOR(v1.x/v2.x, v1.y/v2.y, v1.z/v2.z);
+}
+
+inline int operator < (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
+{
+  return v1[0] < v2[0] && v1[1] < v2[1] && v1[2] < v2[2];
+}
+
+inline int operator <= (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
+{
+  return v1[0] <= v2[0] && v1[1] <= v2[1] && v1[2] <= v2[2];
+}
+
+inline _D3DVECTOR operator * (const _D3DVECTOR& v, D3DVALUE s)
+{
+  return _D3DVECTOR(s*v.x, s*v.y, s*v.z);
+}
+
+inline _D3DVECTOR operator * (D3DVALUE s, const _D3DVECTOR& v)
+{
+  return _D3DVECTOR(s*v.x, s*v.y, s*v.z);
+}
+
+inline _D3DVECTOR operator / (const _D3DVECTOR& v, D3DVALUE s)
+{
+  return _D3DVECTOR(v.x/s, v.y/s, v.z/s);
+}
+
+inline int operator == (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
+{
+  return v1.x==v2.x && v1.y==v2.y && v1.z == v2.z;
+}
+
+inline D3DVALUE Magnitude (const _D3DVECTOR& v)
+{
+  return (D3DVALUE) sqrt(SquareMagnitude(v));
+}
+
+inline D3DVALUE SquareMagnitude (const _D3DVECTOR& v)
+{
+  return v.x*v.x + v.y*v.y + v.z*v.z;
+}
+
+inline _D3DVECTOR Normalize (const _D3DVECTOR& v)
+{
+  return v / Magnitude(v);
+}
+
+inline D3DVALUE Min (const _D3DVECTOR& v)
+{
+  D3DVALUE ret = v.x;
+  if (v.y < ret)
+      ret = v.y;
+
+  if (v.z < ret)
+      ret = v.z;
+
+  return ret;
+}
+
+inline D3DVALUE Max (const _D3DVECTOR& v)
+{
+  D3DVALUE ret = v.x;
+  if (ret < v.y)
+      ret = v.y;
+
+  if (ret < v.z)
+      ret = v.z;
+
+  return ret;
+}
+
+inline _D3DVECTOR Minimize (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
+{
+  return _D3DVECTOR( v1[0] < v2[0] ? v1[0] : v2[0],
+                     v1[1] < v2[1] ? v1[1] : v2[1],
+                     v1[2] < v2[2] ? v1[2] : v2[2]);
+}
+
+inline _D3DVECTOR Maximize (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
+{
+  return _D3DVECTOR( v1[0] > v2[0] ? v1[0] : v2[0],
+                     v1[1] > v2[1] ? v1[1] : v2[1],
+                     v1[2] > v2[2] ? v1[2] : v2[2]);
+}
+
+inline D3DVALUE DotProduct (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
+{
+  return v1.x*v2.x + v1.y * v2.y + v1.z*v2.z;
+}
+
+inline _D3DVECTOR CrossProduct (const _D3DVECTOR& v1, const _D3DVECTOR& v2)
+{
+  _D3DVECTOR result;
+  result[0] = v1[1] * v2[2] - v1[2] * v2[1];
+  result[1] = v1[2] * v2[0] - v1[0] * v2[2];
+  result[2] = v1[0] * v2[1] - v1[1] * v2[0];
+
+  return result;
+}
+
+inline _D3DMATRIX operator* (const _D3DMATRIX& a, const _D3DMATRIX& b)
+{
+  _D3DMATRIX ret;
+  for (int i=0; i<4; i++)
+  {
+    for (int j=0; j<4; j++)
+    {
+      ret(i, j) = 0.0f;
+      for (int k=0; k<4; k++)
+      {
+        ret(i, j) += a(i, k) * b(k, j);
+      }
+    }
+}
+  return ret;
+}
+