/// <summary>
/// Specifically check if the trim parameters are likely set incorrectly to the sum of the lengths of the curve segments,
/// if some of the curve segments are line segments.
/// </summary>
/// <param name="id">The id of the IFC entity containing the directrix, for messaging purposes.</param>
/// <param name="ifcCurve">The IFCCurve entity containing the CurveLoop to be trimmed.</param>
/// <param name="startVal">The starting trim parameter.</param>
/// <param name="endVal">The ending trim parameter.</param>
/// <param name="totalParamLength">The total parametric length of the curve, as defined by IFC.</param>
/// <returns>False if the trim parameters are thought to be invalid or unnecessary, true otherwise.</returns>
private static bool CheckIfTrimParametersAreNeeded(int id, IFCCurve ifcCurve,
double startVal, double endVal, double totalParamLength)
{
// This check allows for some leniency in the setting of startVal and endVal; we assume that:
// 1. If the parameter range is equal, that an offset value is OK; don't trim.
// 2. If the start parameter is 0 and the curveParamLength is greater than the total length, don't trim.
double curveParamLength = endVal - startVal;
if (MathUtil.IsAlmostEqual(curveParamLength, totalParamLength))
{
return(false);
}
if (MathUtil.IsAlmostZero(startVal) && totalParamLength < curveParamLength - MathUtil.Eps())
{
return(false);
}
if (!(ifcCurve is IFCCompositeCurve))
{
return(true);
}
double totalRawParametricLength = 0.0;
foreach (IFCCurve curveSegment in (ifcCurve as IFCCompositeCurve).Segments)
{
if (!(curveSegment is IFCTrimmedCurve))
{
return(true);
}
IFCTrimmedCurve trimmedCurveSegment = curveSegment as IFCTrimmedCurve;
if (trimmedCurveSegment.Trim1 == null || trimmedCurveSegment.Trim2 == null)
{
return(true);
}
totalRawParametricLength += (trimmedCurveSegment.Trim2.Value - trimmedCurveSegment.Trim1.Value);
}
// Error in some Tekla files - lines are parameterized by length, instead of 1.0 (as is correct).
// Warn and ignore the parameter length. This must come after the MathUtil.IsAlmostEqual(curveParamLength, totalParamLength)
// check above, since we don't want to warn if curveParamLength == totalParamLength.
if (MathUtil.IsAlmostEqual(curveParamLength, totalRawParametricLength))
{
Importer.TheLog.LogWarning(id, "The total parameter length for this curve is equal to the sum of the parameter deltas, " +
"and not the parameter length as defined in IFC. " +
"Most likely, this is an error in the sending application, and the trim extents are being ignored. " +
"If this trim was intended, please contact Autodesk.", true);
return(false);
}
return(true);
}
/// <summary>
/// Specifically check if the trim parameters are likely set incorrectly to the sum of the lengths of the curve segments,
/// if some of the curve segments are line segments.
/// </summary>
/// <param name="id">The id of the IFC entity containing the directrix, for messaging purposes.</param>
/// <param name="ifcCurve">The IFCCurve entity containing the CurveLoop to be trimmed.</param>
/// <param name="curveParamLength">The delta between the start and end parameters of the overall curve.</param>
/// <returns>False if the trim parameters are thought to be invalid, true otherwise.</returns>
private static bool CheckIfTrimParametersAreValidForSomeInvalidities(int id, IFCCurve ifcCurve, double curveParamLength)
{
if (!(ifcCurve is IFCCompositeCurve))
{
return(true);
}
double totalRawParametricLength = 0.0;
foreach (IFCCurve curveSegment in (ifcCurve as IFCCompositeCurve).Segments)
{
if (!(curveSegment is IFCTrimmedCurve))
{
return(true);
}
IFCTrimmedCurve trimmedCurveSegment = curveSegment as IFCTrimmedCurve;
if (trimmedCurveSegment.Trim1 == null || trimmedCurveSegment.Trim2 == null)
{
return(true);
}
totalRawParametricLength += (trimmedCurveSegment.Trim2.Value - trimmedCurveSegment.Trim1.Value);
}
if (MathUtil.IsAlmostEqual(curveParamLength, totalRawParametricLength))
{
Importer.TheLog.LogWarning(id, "The total parameter length for this curve is equal to the sum of the parameter deltas, " +
"and not the parameter length as defined in IFC. " +
"Most likely, this is an error in the sending application, and the trim extents are being ignored. " +
"If this trim was intended, please contact Autodesk.", true);
return(false);
}
return(true);
}
