Wrong intersection point for the case of intersection between sphere and plane

Use the following Draw commands to reproduce the bug.

restore f1 b1
restore f2 b2

mksurface s1 b1
mksurface s2 b2
trim s1t s1 0 2 0 2

intersect i s1t s2

1. Initial shapes (see the file Attachment 2 (ZIP) attached)

2. To obtain the results of "Steps To Reproduce" it is necesary to take int account the modifications in the file(s):

 GeometryTest_CurveCommands.cxx

that will be done later.

-----------------------

Version 1

1. New features:
no New features

2. Changes:
2.1. class IntPatch_ImpImpIntersection
    2.1.1. method: void IntPatch_ImpImpIntersection::Perform(
const Handle(Adaptor3d_HSurface)& S1,
const Handle(Adaptor3d_TopolTool)& D1,
const Handle(Adaptor3d_HSurface)& S2,
const Handle(Adaptor3d_TopolTool)& D2,
const Standard_Real TolArc,
const Standard_Real TolTang)

    The check-up of intersection points has been added.
    The contents of the check-up is to analyse
    whether the intersection point ia within the 2D-domain
    of the surface or not.
    Only intersection points that are not out of the 2D-domains
    of both surfaces are added to the resulting sequence.
    
2.2. static functions
    2.2.1 static Standard_Integer intersection (
Draw_Interpretor& di,
Standard_Integer n,
const char** a)

    The graphical display of the intersection points for
    the case of intersection of two surfaces has been added.
 
III. Modified entities:
-packages:
 IntPatch
 GeometryTest

-classes:
 IntPatch_ImpImpIntersection

-functions
 intersection
 
-methods:
void IntPatch_ImpImpIntersection::Perform(
const Handle(Adaptor3d_HSurface)& S1,
const Handle(Adaptor3d_TopolTool)& D1,
const Handle(Adaptor3d_HSurface)& S2,
const Handle(Adaptor3d_TopolTool)& D2,
const Standard_Real TolArc,
const Standard_Real TolTang)