/// <summary>
/// Processes measure with unit.
/// </summary>
/// <param name="measureUnitHnd">The measure unit handle.</param>
void ProcessIFCMeasureWithUnit(IFCAnyHandle measureUnitHnd)
{
double baseScale = 0.0;
IFCData ifcData = measureUnitHnd.GetAttribute("ValueComponent");
if (!ifcData.HasValue)
{
throw new InvalidOperationException("#" + measureUnitHnd.StepId + ": Missing required attribute ValueComponent.");
}
if (ifcData.PrimitiveType == IFCDataPrimitiveType.Double)
{
baseScale = ifcData.AsDouble();
}
else if (ifcData.PrimitiveType == IFCDataPrimitiveType.Integer)
{
baseScale = (double)ifcData.AsInteger();
}
if (MathUtil.IsAlmostZero(baseScale))
{
throw new InvalidOperationException("#" + measureUnitHnd.StepId + ": ValueComponent should not be almost zero.");
}
IFCAnyHandle unitHnd = IFCImportHandleUtil.GetRequiredInstanceAttribute(measureUnitHnd, "UnitComponent", true);
IFCUnit unit = ProcessIFCUnit(unitHnd);
CopyUnit(unit);
ScaleFactor = unit.ScaleFactor * baseScale;
}
private int?GetValidIndex(IFCData segmentInfoIndex, int maxValue)
{
// Index starts at 1.
int currentIndex = segmentInfoIndex.AsInteger() - 1;
if (currentIndex < 0 || currentIndex >= maxValue)
{
// TODO: warn.
return(null);
}
return(currentIndex);
}
/// <summary>
/// Gets an arbitrary integer attribute.
/// </summary>
/// <param name="name">The handle.</param>
/// <param name="name">The attribute name.</param>
/// <returns>The integer.</returns>
public static int?GetIntAttribute(IFCAnyHandle hnd, string name)
{
if (hnd == null)
{
throw new ArgumentNullException("hnd");
}
if (!hnd.HasValue)
{
throw new ArgumentException("Invalid handle.");
}
IFCData ifcData = hnd.GetAttribute(name);
if (ifcData.PrimitiveType == IFCDataPrimitiveType.Integer)
{
return(ifcData.AsInteger());
}
return(null);
}