Proceed with merge

src/ifcgeom/kernels/opencascade/bspline_surface.cpp

@@ -0,0 +1,59 @@
+#include "OpenCascadeKernel.h"
+
+#include <Geom_BSplineSurface.hxx>
+
+using namespace ifcopenshell::geometry;
+using namespace ifcopenshell::geometry::kernels;
+using namespace IfcGeom;
+
+bool OpenCascadeKernel::convert(const taxonomy::bspline_surface* bs, Handle(Geom_Surface) surf) {
+	const bool is_rational = !!bs->weights;
+
+	TColgp_Array2OfPnt Poles(0, (int)bs->control_points.size() - 1, 0, (int)(*bs->control_points.begin()).size() - 1);
+	TColStd_Array2OfReal Weights(0, (int)bs->control_points.size() - 1, 0, (int)(*bs->control_points.begin()).size() - 1);
+	TColStd_Array1OfReal UKnots(0, (int)bs->knots[0].size() - 1);
+	TColStd_Array1OfReal VKnots(0, (int)bs->knots[1].size() - 1);
+	TColStd_Array1OfInteger UMults(0, (int)bs->multiplicities[0].size() - 1);
+	TColStd_Array1OfInteger VMults(0, (int)bs->multiplicities[1].size() - 1);
+	Standard_Integer UDegree = bs->degree[0];
+	Standard_Integer VDegree = bs->degree[1];
+
+	int i = 0, j;
+	for (auto it = bs->control_points.begin(); it != bs->control_points.end(); ++it, ++i) {
+		j = 0;
+		for (auto jt = (*it).begin(); jt != (*it).end(); ++jt, ++j) {
+			Poles(i, j) = convert_xyz<gp_Pnt>(*jt);
+		}
+	}
+
+	i = 0;
+	for (std::vector<double>::const_iterator it = bs->knots[0].begin(); it != bs->knots[0].end(); ++it, ++i) {
+		UKnots(i) = *it;
+	}
+	i = 0;
+	for (std::vector<double>::const_iterator it = bs->knots[1].begin(); it != bs->knots[1].end(); ++it, ++i) {
+		VKnots(i) = *it;
+	}
+	i = 0;
+	for (std::vector<int>::const_iterator it = bs->multiplicities[0].begin(); it != bs->multiplicities[0].end(); ++it, ++i) {
+		UMults(i) = *it;
+	}
+	i = 0;
+	for (std::vector<int>::const_iterator it = bs->multiplicities[1].begin(); it != bs->multiplicities[1].end(); ++it, ++i) {
+		VMults(i) = *it;
+	}
+
+	if (is_rational) {
+		for (auto it = bs->weights->begin(); it != bs->weights->end(); ++it, ++i) {
+			j = 0;
+			for (auto jt = (*it).begin(); jt != (*it).end(); ++jt, ++j) {
+				Weights(i, j) = *jt;
+			}
+		}
+		surf = new Geom_BSplineSurface(Poles, Weights, UKnots, VKnots, UMults, VMults, UDegree, VDegree);
+	} else {
+		surf = new Geom_BSplineSurface(Poles, UKnots, VKnots, UMults, VMults, UDegree, VDegree);
+	}
+
+	return true;
+}