+ return isCurveType(MY_CURVE, STANDARD_TYPE(Geom_Circle));
+}
+
+bool GeomAPI_Curve::isEllipse() const
+{
+ return isCurveType(MY_CURVE, STANDARD_TYPE(Geom_Ellipse));
+}
+
+double GeomAPI_Curve::startParam()
+{
+ if (Precision::IsInfinite(myStart)) {
+ if (isTrimmed()) {
+ myStart = Handle(Geom_TrimmedCurve)::DownCast(MY_CURVE)->FirstParameter();
+ }
+ else if (MY_CURVE->IsClosed() && MY_CURVE->IsPeriodic())
+ myStart = 0.0;
+ }
+ return myStart;
+}
+
+double GeomAPI_Curve::endParam()
+{
+ if (Precision::IsInfinite(myEnd)) {
+ if (isTrimmed()) {
+ myEnd = Handle(Geom_TrimmedCurve)::DownCast(MY_CURVE)->LastParameter();
+ }
+ else if (MY_CURVE->IsClosed() && MY_CURVE->IsPeriodic())
+ myEnd = MY_CURVE->Period();
+ }
+ return myEnd;