public static IfcNamedUnit GetUnitFor(this IfcUnitAssignment ua, IfcPhysicalSimpleQuantity Quantity)
{
if (Quantity.Unit != null)
return Quantity.Unit;
IfcUnitEnum? requiredUnit = null;
// list of possible types taken from:
// http://www.buildingsmart-tech.org/ifc/IFC2x3/TC1/html/ifcquantityresource/lexical/ifcphysicalsimplequantity.htm
//
if (Quantity is IfcQuantityLength)
requiredUnit = IfcUnitEnum.LENGTHUNIT;
else if (Quantity is IfcQuantityArea)
requiredUnit = IfcUnitEnum.AREAUNIT;
else if (Quantity is IfcQuantityVolume)
requiredUnit = IfcUnitEnum.VOLUMEUNIT;
else if (Quantity is IfcQuantityCount) // really not sure what to do here.
return null;
else if (Quantity is IfcQuantityWeight)
requiredUnit = IfcUnitEnum.MASSUNIT;
else if (Quantity is IfcQuantityTime)
requiredUnit = IfcUnitEnum.TIMEUNIT;
if (requiredUnit == null)
return null;
IfcNamedUnit nu = ua.Units.OfType<IfcSIUnit>().FirstOrDefault(u => u.UnitType == (IfcUnitEnum)requiredUnit);
if (nu == null)
nu = ua.Units.OfType<IfcConversionBasedUnit>().FirstOrDefault(u => u.UnitType == (IfcUnitEnum)requiredUnit);
return nu;
}
/// <summary>
/// get the IfcPhysicalSimpleQuantity property value
/// </summary>
/// <param name="p">IfcPhysicalSimpleQuantity</param>
/// <param name="ifcGlobalUnits">global unit dictionary</param>
/// <returns>string representing the value with units</returns>
public static string FormatQuantityValue(IfcPhysicalSimpleQuantity p, ConcurrentDictionary<string, string> ifcGlobalUnits)
{
string numberFormat = "{0,0:N2}";
string unit = string.Empty;
//get associated unit abbreviation to the IfcPhysicalSimpleQuantity
if (p.Unit != null)
unit = GetUnitAbbreviation(p.Unit);
if (p is IfcQuantityLength)
{
string value = string.Format(numberFormat, (p as IfcQuantityLength).LengthValue.Value);
//get global if unit is null
if (string.IsNullOrEmpty(unit))
{
if (!ifcGlobalUnits.TryGetValue(IfcUnitEnum.LENGTHUNIT.ToString(), out unit))
unit = string.Empty;
}
return value + unit;
}
if (p is IfcQuantityArea)
{
string value = string.Format(numberFormat, (p as IfcQuantityArea).AreaValue.Value);
if (string.IsNullOrEmpty(unit))
{
if (!ifcGlobalUnits.TryGetValue(IfcUnitEnum.AREAUNIT.ToString(), out unit))
unit = string.Empty;
}
return value + unit;
}
if (p is IfcQuantityVolume)
{
string value = string.Format(numberFormat, (p as IfcQuantityVolume).VolumeValue.Value);
if (string.IsNullOrEmpty(unit))
{
if (!ifcGlobalUnits.TryGetValue(IfcUnitEnum.VOLUMEUNIT.ToString(), out unit))
unit = string.Empty;
}
return value + unit;
}
if (p is IfcQuantityCount)
{
string value = string.Format(numberFormat, (p as IfcQuantityCount).CountValue.Value);
return value + unit;
}
if (p is IfcQuantityWeight)
{
string value = string.Format(numberFormat, (p as IfcQuantityWeight).WeightValue.Value);
if (string.IsNullOrEmpty(unit))
{
if (!ifcGlobalUnits.TryGetValue(IfcUnitEnum.MASSUNIT.ToString(), out unit))
unit = string.Empty;
}
return value + unit;
}
if (p is IfcQuantityTime)
{
string value = string.Format(numberFormat, (p as IfcQuantityTime).TimeValue.Value);
if (string.IsNullOrEmpty(unit))
{
if (!ifcGlobalUnits.TryGetValue(IfcUnitEnum.TIMEUNIT.ToString(), out unit))
unit = string.Empty;
}
return value + unit;
}
return string.Empty;
}
