Smrf.NodeXL.Visualization.Wpf.CollapsedGroupDrawingManager.GetFanMotifAngleRadians C# (CSharp) Method

    GetFanMotifAngleRadians()
    {
        Debug.Assert(m_oCollapsedGroupAttributes != null);
        AssertValid();

        // Scale the fan's arc by a scale factor stored in the collapsed group
        // attributes.  The scale factor ranges from 0 to 1.0.

        Double dArcScale;

        if ( !m_oCollapsedGroupAttributes.TryGetValue(
            CollapsedGroupAttributeKeys.ArcScale, out dArcScale) )
        {
            // Behave gracefully.

            dArcScale = 0.5;
        }

        Double dAngleRadians = MathUtil.TransformValueToRange(
            (Single)dArcScale,
            0, 1.0F,
            (Single)MinimumFanMotifAngleRadians,
            (Single)MaximumFanMotifAngleRadians
            );

        return (dAngleRadians);
    }