Function Geom_loft_nurbs

Code/Source/PythonAPI/Geometry_PyModule.cxx:636–734

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static PyObject *
Geom_loft_nurbs(PyObject* self, PyObject* args, PyObject* kwargs)
{
  #define ndbg_Geom_loft_nurbs
  #ifdef dbg_Geom_loft_nurbs
  std::cout << " " << std::endl;
  std::cout << "========== Geom_loft_nurbs ==========" << std::endl;
  #endif
  auto api = PyUtilApiFunction("O!O!|i", PyRunTimeErr, __func__);
  static char *keywords[] = {"polydata_list", "loft_options", "num_sections", NULL};
  PyObject* objListArg;
  PyObject* loftOptsArg;
  int num_sections = 12;

  if (!PyArg_ParseTupleAndKeywords(args, kwargs, api.format, keywords, &PyList_Type, &objListArg,
        &PyLoftNurbsOptionsType, &loftOptsArg, &num_sections)) {
      return api.argsError();
  }

  // Check the list of polydata curve profiles.
  auto cvPolyDataList = GetGeometryObjects(api, objListArg);
  int numProfiles = cvPolyDataList.size();
  if (numProfiles == 0) {
      return nullptr;
  }

  if (numProfiles < 2) {
      api.error("At least two profiles are needed for lofing.");
      return nullptr;
  }

  // Check that the profiles have the same number of points.
  int numProfilePoints = 0;
  for (auto const& profile : cvPolyDataList) {
      int numPoints = profile->GetVtkPolyData()->GetNumberOfPoints();
      if (numProfilePoints == 0) {
          numProfilePoints = numPoints;
      } else if (numPoints != numProfilePoints) {
          api.error("Profiles do not have the same number of points.");
          return nullptr;
      }
  }

  // Extract loft option values from the loftOptions object.
  //
  int uDegree = LoftNurbsOptionsGetInt(loftOptsArg, LoftNurbsOptions::U_DEGREE);
  int vDegree = LoftNurbsOptionsGetInt(loftOptsArg, LoftNurbsOptions::V_DEGREE);
  double uSpacing = 1.0 / (num_sections * numProfiles);
  double vSpacing = 1.0 / numProfilePoints;
  char* uKnotSpanType = LoftNurbsOptionsGetString(loftOptsArg, LoftNurbsOptions::U_KNOT_SPAN_TYPE);
  char* vKnotSpanType = LoftNurbsOptionsGetString(loftOptsArg, LoftNurbsOptions::V_KNOT_SPAN_TYPE);
  char* uParametricSpanType = LoftNurbsOptionsGetString(loftOptsArg, LoftNurbsOptions::U_PARAMETRIC_SPAN_TYPE);
  char* vParametricSpanType = LoftNurbsOptionsGetString(loftOptsArg, LoftNurbsOptions::V_PARAMETRIC_SPAN_TYPE);

  #ifdef dbg_Geom_loft_nurbs
  std::cout << "[Geom_loft_nurbs] numProfilePoints: " << numProfilePoints << std::endl;
  std::cout << "[Geom_loft_nurbs] uDegree: " << uDegree << std::endl;
  std::cout << "[Geom_loft_nurbs] vDegree: " << vDegree << std::endl;