- TopoDS_Shape aShapePnt = aRefPoint->GetValue();
- TopoDS_Shape aShapeVec = aRefVector->GetValue();
- if (aShapePnt.ShapeType() == TopAbs_VERTEX &&
- aShapeVec.ShapeType() == TopAbs_EDGE) {
- gp_Pnt aP = BRep_Tool::Pnt(TopoDS::Vertex(aShapePnt));
+ if (!aRefVector.IsNull()) {
+ TopoDS_Shape aShapeVec = aRefVector->GetValue();
+ if (aShapeVec.ShapeType() != TopAbs_EDGE) {
+ Standard_ConstructionError::Raise
+ ("Ellipse creation aborted: invalid normal vector argument, must be a vector or an edge");
+ }
+ TopoDS_Edge anE = TopoDS::Edge(aShapeVec);
+ TopoDS_Vertex V1, V2;
+ TopExp::Vertices(anE, V1, V2, Standard_True);
+ if (!V1.IsNull() && !V2.IsNull()) {
+ aV = gp_Vec(BRep_Tool::Pnt(V1), BRep_Tool::Pnt(V2));
+ if (aV.Magnitude() < gp::Resolution()) {
+ Standard_ConstructionError::Raise
+ ("Ellipse creation aborted: normal vector of zero length is given");
+ }
+ }
+ }
+
+ // Axes
+ gp_Ax2 anAxes (aP, aV);
+
+ // Main Axis vector
+ Handle(GEOM_Function) aRefVectorMaj = aCI.GetVectorMajor();
+ if (!aRefVectorMaj.IsNull()) {
+ TopoDS_Shape aShapeVec = aRefVectorMaj->GetValue();
+ if (aShapeVec.ShapeType() != TopAbs_EDGE) {
+ Standard_ConstructionError::Raise
+ ("Ellipse creation aborted: invalid major axis vector argument, must be a vector or an edge");
+ }