0023706: Cannot project point on curve

1.   Approximation of derivative (by Taylor-series and by three points).
2.   Some methods (Degree(), GetType(), D0(), D3(), DN()) are added.
3.   Getting of subInterval's boundaries.
4.   Algorithm for checking if 1st derivative is equal to zero is amended.
5.   Cases are controlled when extrema or Project point do not exist.
6.   GetNormal() function for gp_Vec2d was added.
7.   Computing of Value, D0, D1, D2 and D3 for offset curves was changed.
8.   Limitation of tolerance for derivative computing was added.
9.   Methods for computing trihedron in singularity point are added.
10. Test tests/bugs/moddata_3/bug23706 is added.
11. Restriction on the LastParameter for visualization of 3-D curves. Calling PlotCurve(...) function for last interval.
12. LProp package is modified for tangent computing in singularity point (LProp_CLProps, LProp_SLProps).
13. Added test cases for issue.
Deleting bad test cases for this fix

src/Geom2dInt/Geom2dInt_CurveTool.cdl

@@ -44,7 +44,7 @@ uses
 is
 
 
-    TheType(myclass; C: IntCurveCurve)
+    GetType(myclass; C: IntCurveCurve)
     	---C++: inline
     	returns CurveType from GeomAbs;
 
@@ -145,6 +145,15 @@ is
     D2 (myclass; C: IntCurveCurve; U: Real ; 
                  P: out Pnt2d; T,N: out Vec2d);
          ---C++: inline
+    
+    D3 (myclass; C: IntCurveCurve; U: Real ; 
+                 P: out Pnt2d; T,N,V: out Vec2d);
+         ---C++: inline
+    
+    DN(myclass; C: IntCurveCurve; U: Real ; 
+                 N: Integer from Standard)
+         returns Vec2d;
+         ---C++: inline
 
    NbIntervals(myclass ; C:  IntCurveCurve) 
         ---Purpose : output the number of interval of continuity C2 of 
@@ -165,6 +174,10 @@ is
         --           used if Type == Composite.
         ---C++: inline
 
+   Degree(myclass; C : IntCurveCurve) returns Integer from Standard;
+     	---C++: inline
+
+
 end CurveTool;
 
 

src/Geom2dInt/Geom2dInt_CurveTool.lxx

@@ -35,7 +35,7 @@
 
 #define   IS_C2_COMPOSITE 0
 //============================================================
-inline GeomAbs_CurveType Geom2dInt_CurveTool::TheType(const IntCurveCurve& C) {
+inline GeomAbs_CurveType Geom2dInt_CurveTool::GetType(const IntCurveCurve& C) {
   return(C.GetType());
 }
 //============================================================
@@ -85,6 +85,25 @@ inline void Geom2dInt_CurveTool::D2 (const IntCurveCurve& C,
   
  C.D2(U,P,T,N);
 }
+
+//============================================================
+inline void Geom2dInt_CurveTool::D3 (const IntCurveCurve& C,
+				     const Standard_Real U,
+				     gp_Pnt2d& P,
+				     gp_Vec2d& T,
+				     gp_Vec2d& N,
+				     gp_Vec2d& V) {
+  
+ C.D3(U,P,T,N,V);
+}
+//============================================================
+inline gp_Vec2d Geom2dInt_CurveTool::DN(const Adaptor2d_Curve2d& C,
+             const Standard_Real U,
+             const Standard_Integer N)
+  {
+  return C.DN(U,N);  
+  }
+
 //============================================================
 inline Standard_Real Geom2dInt_CurveTool::FirstParameter (const IntCurveCurve& C) {
   return(C.FirstParameter());
@@ -134,4 +153,7 @@ inline Standard_Integer Geom2dInt_CurveTool::NbIntervals(const IntCurveCurve& C)
 }
 //============================================================
 
-
+ inline Standard_Integer Geom2dInt_CurveTool::Degree(const IntCurveCurve& C)
+{
+  return C.Degree();
+}