Method GetAlignmentCurve

src/cpp/web-ifc/geometry/IfcGeometryLoader.cpp:655–945

  }

  IfcCurve IfcGeometryLoader::GetAlignmentCurve(uint32_t expressID, uint32_t parentExpressID) const
  {
    spdlog::debug("[GetAlignmentCurve({})]", expressID);
    auto lineType = _loader.GetLineType(expressID);

    IfcCurve alignmentCurve;

    switch (lineType)
    {
    case schema::IFCALIGNMENTSEGMENT:
    {

      _loader.MoveToArgumentOffset(expressID, 5);
      uint32_t localPlacement = 0;
      if (_loader.GetTokenType() == parsing::IfcTokenType::REF)
      {
        _loader.StepBack();
        localPlacement = _loader.GetRefArgument();
      }

      glm::dmat4 transform_t = glm::dmat4(1);
      if (localPlacement != 0 && _loader.IsValidExpressID(localPlacement))
      {
        transform_t = GetLocalPlacement(localPlacement);
      }

      _loader.MoveToArgumentOffset(expressID, 7);
      uint32_t curveID = 0;
      if (_loader.GetTokenType() == parsing::IfcTokenType::REF)
      {
        _loader.StepBack();
        curveID = _loader.GetRefArgument();
      }
      if (curveID != 0 && _loader.IsValidExpressID(curveID))
      {
        IfcCurve temp = GetAlignmentCurve(curveID, parentExpressID);
        alignmentCurve = temp;
      }

      for (size_t i = 0; i < alignmentCurve.points.size(); i++)
      {
        alignmentCurve.points[i] = glm::dvec4(alignmentCurve.points[i].x, alignmentCurve.points[i].y, 0, 1) * transform_t;
      }

      break;
    }
    case schema::IFCALIGNMENTHORIZONTALSEGMENT:
    {

      _loader.MoveToArgumentOffset(expressID, 8);
      std::string_view type = _loader.GetStringArgument();

      _loader.MoveToArgumentOffset(expressID, 2);
      uint32_t ifcStartPoint = _loader.GetRefArgument();
      glm::dvec2 StartPoint = GetCartesianPoint2D(ifcStartPoint);

      _loader.MoveToArgumentOffset(expressID, 3);
      double ifcStartDirection = _loader.GetDoubleArgument();