C++ (Cpp) ON_3dVector::PerpendicularToの例

コード例 #1

ファイル: opennurbs_line.cpp プロジェクト: ckvk/opennurbs

bool ON_Line::InPlane( ON_Plane& plane, double tolerance ) const
{
  const ON_3dVector v = to-from;
  const bool bTinyX = fabs(v.x) <= tolerance;
  const bool bTinyY = fabs(v.y) <= tolerance;
  const bool bTinyZ = fabs(v.z) <= tolerance;
  bool rc = true;
  ON_3dVector X;
  ON_3dVector Y;
  if ( bTinyZ && ( !bTinyX || !bTinyY ) )
  {
    X = ON_xaxis;
    Y = ON_yaxis;
  }
  else if ( bTinyX && ( !bTinyY || !bTinyZ ) )
  {
    X = ON_yaxis;
    Y = ON_zaxis;
  }
  else if ( bTinyY && ( !bTinyZ || !bTinyX ) )
  {
    X = ON_zaxis;
    Y = ON_xaxis;
  }
  else
  {
    X = v;
    X.Unitize();
    Y.PerpendicularTo(X);
    if ( bTinyX && bTinyY && bTinyZ )
    {
      rc = false;
      if ( X.IsZero() )
      {
        X = ON_xaxis;
        Y = ON_yaxis;
      }
    }
  }
  plane.CreateFromFrame( from, X, Y );
  return rc;
}