TriangleElement.TriangleElementClass.BuildTriangleGeometry C# (CSharp) Метод

    private void BuildTriangleGeometry(IPoint pointGeometry)
    {
      try
      {
        if (null == m_triangle || null == pointGeometry || null == m_cachedDisplay)
          return;

        m_triangle.SpatialReference = pointGeometry.SpatialReference;
        m_triangle.SetEmpty();

        object missing = System.Reflection.Missing.Value;
        IPointCollection pointCollection = (IPointCollection)m_triangle;

        double radius = PointsToMap(m_cachedDisplay.DisplayTransformation, m_size);

        double X = pointGeometry.X;
        double Y = pointGeometry.Y;

        IPoint point = new PointClass();
        point.X = X + radius * c_Cosine30;
        point.Y = Y - 0.5 * radius;
        pointCollection.AddPoint(point, ref missing, ref missing);

        point = new PointClass();
        point.X = X;
        point.Y = Y + radius;
        pointCollection.AddPoint(point, ref missing, ref missing);

        point = new PointClass();
        point.X = X - radius * c_Cosine30;
        point.Y = Y - 0.5 * radius;
        pointCollection.AddPoint(point, ref missing, ref missing);

        m_triangle.Close();

        if (m_rotation != 0.0)
        {
          ((ITransform2D)pointCollection).Rotate(pointGeometry, m_rotation * c_Deg2Rad);
        }

        return;
      }
      catch (Exception ex)
      {
        System.Diagnostics.Trace.WriteLine(ex.Message);
      }
    }