/// <summary>
/// Create the cross section type and angle information for a specified Wall element.
/// </summary>
/// <param name="wallElement">The wall element.</param>
/// <returns>The WallCrossSectionInfo information, or null if not consistent.</returns>
/// <remarks>
/// The angles returned will be consistent with the cross section type.
/// 1. A vertical wall will have no angles set.
/// 2. A slanted wall will have one angle set, or will return null if that angle can't be found.
/// 3. A tapered wall will have both angles set, or will return null if either angle can't be found.
/// </remarks>
public static WallCrossSectionInfo Create(Wall wallElement)
{
if (wallElement == null)
{
return(null);
}
Parameter crossSectionParam = wallElement.get_Parameter(BuiltInParameter.WALL_CROSS_SECTION);
if (crossSectionParam == null || !crossSectionParam.HasValue || crossSectionParam.StorageType != StorageType.Integer)
{
return(null);
}
WallCrossSection crossSectionType = (WallCrossSection)crossSectionParam.AsInteger();
double? angle1 = null;
double? angle2 = null;
switch (crossSectionType)
{
case WallCrossSection.Vertical: // Vertical.
break;
case WallCrossSection.SingleSlanted: // Slanted.
Parameter angleParam = wallElement.get_Parameter(BuiltInParameter.WALL_SINGLE_SLANT_ANGLE_FROM_VERTICAL);
if (angleParam != null && angleParam.HasValue && angleParam.StorageType == StorageType.Double)
{
angle1 = angleParam.AsDouble();
}
else
{
return(null);
}
break;
case WallCrossSection.Tapered: // Vertically tapered.
Parameter exteriorAngleParam = wallElement.get_Parameter(BuiltInParameter.WALL_TAPERED_EXTERIOR_INWARD_ANGLE);
Parameter rightAngleParam = wallElement.get_Parameter(BuiltInParameter.WALL_TAPERED_INTERIOR_INWARD_ANGLE);
// The two angles measure the inward slant. That is, they are positive if the
// corresponding side face of the wall slants "into the wall" (i.e., toward the
// other side of the wall).
if ((exteriorAngleParam != null && exteriorAngleParam.HasValue && exteriorAngleParam.StorageType == StorageType.Double) &&
(rightAngleParam != null && rightAngleParam.HasValue && rightAngleParam.StorageType == StorageType.Double))
{
angle1 = exteriorAngleParam.AsDouble();
angle2 = rightAngleParam.AsDouble();
}
else
{
return(null);
}
break;
default:
// Unknown case.
return(null);
}
return(new WallCrossSectionInfo(crossSectionType, angle1, angle2));
}
private WallCrossSectionInfo(WallCrossSection wallCrossSection, double?angle1, double?angle2)
{
CrossSectionInfo = Tuple.Create(wallCrossSection, angle1, angle2);
}