/// <summary>
/// Converts a list of vectors from the units from an IFC file to the corresponding Revit internal units.
/// </summary>
/// <param name="specTypeId">Identifier of the spec for this value.</param>
/// <param name="inValue">The value to convert.</param>
/// <returns>The result value in Revit internal units.</returns>
/// <remarks>Note that the OffsetFactor is ignored.</remarks>
static public void ProjectScale(ForgeTypeId specTypeId, IList <XYZ> inValues)
{
if (inValues == null)
{
return;
}
IFCUnit projectUnit = IFCImportFile.TheFile.IFCUnits.GetIFCProjectUnit(specTypeId);
if (projectUnit == null)
{
return;
}
double factor = projectUnit.ScaleFactor;
if (MathUtil.IsAlmostEqual(factor, 1.0))
{
return;
}
int count = inValues.Count;
for (int ii = 0; ii < count; ii++)
{
inValues[ii] *= factor;
}
}
/// <summary>
/// Converts a vector from the units from an IFC file to the corresponding Revit internal units.
/// </summary>
/// <param name="inValue">The value to convert.</param>
/// <returns>The result value in Revit internal units.</returns>
/// <remarks>Note that the OffsetFactor is ignored.</remarks>
static public XYZ ScaleLength(XYZ inValue)
{
IFCUnit projectUnit = IFCImportFile.TheFile.IFCUnits.GetIFCProjectUnit(SpecTypeId.Length);
if (projectUnit != null)
{
return(inValue * projectUnit.ScaleFactor);
}
return(inValue);
}
/// <summary>
/// Converts a value from the units from an IFC file to the corresponding Revit internal units.
/// </summary>
/// <param name="specTypeId">Identifier of the spec for this value.</param>
/// <param name="inValue">The value to convert.</param>
/// Some units we really always want in the standard document units.
/// For example, angles in Radians.
/// </param>
/// <returns>The result value in Revit internal units.</returns>
static private double ProjectScale(ForgeTypeId specTypeId, double inValue)
{
IFCUnit projectUnit = IFCImportFile.TheFile.IFCUnits.GetIFCProjectUnit(specTypeId);
if (projectUnit != null)
{
return(inValue * projectUnit.ScaleFactor - projectUnit.OffsetFactor);
}
return(inValue);
}
/// <summary>
/// Converts a value from default unit to the project unit.
/// </summary>
/// <param name="unitType">The unit type.</param>
/// <param name="inValue">The value to convert.</param>
/// <returns>The result value.</returns>
/// <remarks>Note the the OffsetFactor is ignored, as it is irrelevant for a location.</remarks>
static public XYZ ProjectScale(UnitType unitType, XYZ inValue)
{
IFCUnit projectUnit = IFCImportFile.TheFile.IFCUnits.GetIFCProjectUnit(unitType);
if (projectUnit != null)
{
return(inValue * projectUnit.ScaleFactor);
}
return(inValue);
}
private IFCAnyHandle CreateSIUnit(IFCFile file, UnitType? unitType, IFCUnit ifcUnitType, IFCSIUnitName unitName, IFCSIPrefix? prefix, DisplayUnitType? dut)
{
IFCAnyHandle siUnit = IFCInstanceExporter.CreateSIUnit(file, ifcUnitType, prefix, unitName);
if (unitType.HasValue && dut.HasValue)
{
double scaleFactor = UnitUtils.ConvertFromInternalUnits(1.0, dut.Value);
ExporterCacheManager.UnitsCache.AddUnit(unitType.Value, siUnit, scaleFactor, 0.0);
}
return siUnit;
}
/// <summary>
/// Creates a handle representing an IfcConversionBasedUnit and assigns it to the file.
/// </summary>
/// <param name="file">The file.</param>
/// <param name="dimensions">The dimensional exponents of the SI base units by which the named unit is defined.</param>
/// <param name="unitType">The type of the unit.</param>
/// <param name="name">The word, or group of words, by which the conversion based unit is referred to.</param>
/// <param name="conversionFactor">The physical quantity from which the converted unit is derived.</param>
/// <returns>The handle.</returns>
public static IFCAnyHandle CreateConversionBasedUnit(IFCFile file, IFCAnyHandle dimensions, IFCUnit unitType,
string name, IFCAnyHandle conversionFactor)
{
ValidateNamedUnit(dimensions, unitType);
IFCAnyHandleUtil.ValidateSubTypeOf(conversionFactor, false, IFCEntityType.IfcMeasureWithUnit);
IFCAnyHandle conversionBasedUnit = CreateInstance(file, IFCEntityType.IfcConversionBasedUnit);
IFCAnyHandleUtil.SetAttribute(conversionBasedUnit, "Name", name);
IFCAnyHandleUtil.SetAttribute(conversionBasedUnit, "ConversionFactor", conversionFactor);
SetNamedUnit(conversionBasedUnit, dimensions, unitType);
return conversionBasedUnit;
}
/// <summary>
/// Creates a handle representing an IfcSIUnit and assigns it to the file.
/// </summary>
/// <param name="file">The file.</param>
/// <param name="unitType">The type of the unit.</param>
/// <param name="prefix">The SI Prefix for defining decimal multiples and submultiples of the unit.</param>
/// <param name="name">The word, or group of words, by which the SI unit is referred to.</param>
/// <returns>The handle.</returns>
public static IFCAnyHandle CreateSIUnit(IFCFile file, IFCUnit unitType, IFCSIPrefix? prefix,
IFCSIUnitName name)
{
IFCAnyHandle siUnit = CreateInstance(file, IFCEntityType.IfcSIUnit);
IFCAnyHandleUtil.SetAttribute(siUnit, "Prefix", prefix);
IFCAnyHandleUtil.SetAttribute(siUnit, "Name", name);
SetNamedUnit(siUnit, null, unitType);
return siUnit;
}
/// <summary>
/// Sets attributes to IfcNamedUnit.
/// </summary>
/// <param name="namedUnit">The IfcNamedUnit.</param>
/// <param name="dimensions">The dimensions.</param>
/// <param name="unitType">The type of the unit.</param>
private static void SetNamedUnit(IFCAnyHandle namedUnit, IFCAnyHandle dimensions, IFCUnit unitType)
{
IFCAnyHandleUtil.SetAttribute(namedUnit, "Dimensions", dimensions);
IFCAnyHandleUtil.SetAttribute(namedUnit, "UnitType", unitType);
}
/// <summary>
/// Validates the values to be set to IfcNamedUnit.
/// </summary>
/// <param name="dimensions">The dimensions.</param>
/// <param name="unitType">The type of the unit.</param>
private static void ValidateNamedUnit(IFCAnyHandle dimensions, IFCUnit unitType)
{
IFCAnyHandleUtil.ValidateSubTypeOf(dimensions, false, IFCEntityType.IfcDimensionalExponents);
}
private IFCAnyHandle CreateSIUnit(IFCFile file, IFCUnit ifcUnitType, IFCSIUnitName unitName, IFCSIPrefix? prefix)
{
IFCAnyHandle siUnit = IFCInstanceExporter.CreateSIUnit(file, ifcUnitType, prefix, unitName);
return siUnit;
}
