XNA Ray Intersect Triangle

private bool RayIntersectTriangle(Vector3 rayPosition, Vector3 rayDirection, Vector3 tri0, Vector3 tri1, Vector3 tri2, ref float pickDistance, ref float barycentricU, ref float barycentricV)
{
 // Find vectors for two edges sharing vert0
 Vector3 edge1 = tri1 - tri0;
 Vector3 edge2 = tri2 - tri0;

 // Begin calculating determinant - also used to calculate barycentricU parameter
 Vector3 pvec = Vector3.Cross(rayDirection, edge2);

 // If determinant is near zero, ray lies in plane of triangle
 float det = Vector3.Dot(edge1, pvec);
 if (det < 0.0001f)
  return false;

 // Calculate distance from vert0 to ray origin
 Vector3 tvec = rayPosition - tri0;

 // Calculate barycentricU parameter and test bounds
 barycentricU = Vector3.Dot(tvec, pvec);
 if (barycentricU < 0.0f || barycentricU > det)
  return false;

 // Prepare to test barycentricV parameter
 Vector3 qvec = Vector3.Cross(tvec, edge1);

 // Calculate barycentricV parameter and test bounds
 barycentricV = Vector3.Dot(rayDirection, qvec);
 if (barycentricV < 0.0f || barycentricU + barycentricV > det)
  return false;

 // Calculate pickDistance, scale parameters, ray intersects triangle
 pickDistance = Vector3.Dot(edge2, qvec);
 float fInvDet = 1.0f / det;
 pickDistance *= fInvDet;
 barycentricU *= fInvDet;
 barycentricV *= fInvDet;

 return true;
}