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-- File: Extrema_GenLocateExtSS.cdl
-- Created: Mon Jan 22 10:33:25 1996
-- Author: Laurent PAINNOT
-- <lpa@nonox>
---Copyright: Matra Datavision 1996
class GenLocateExtSS from Extrema
---Purpose: With two close points it calculates the distance
-- between two surfaces.
-- This distance can be a minimum or a maximum.
uses POnSurf from Extrema,
Pnt from gp,
Surface from Adaptor3d
raises DomainError from Standard,
NotDone from StdFail
is
Create returns GenLocateExtSS;
Create (S1, S2: Surface from Adaptor3d; U1,V1, U2,V2: Real; Tol1,Tol2: Real)
returns GenLocateExtSS
---Purpose: Calculates the distance with two close points.
-- The close points are defined by the parameter values
-- (U1,V1) for S1 and (U2,V2) for S2.
-- The function F(u1,v1,u2,v2)=distance(S1(u1,v1),S2(u2,v2))
-- has an extremun when gradient(F)=0. The algorithm searchs
-- a zero near the close points.
raises DomainError;
-- if U1,V1,U2,V2 are outside the definition ranges of the
-- surfaces.
Perform(me: in out; S1, S2: Surface from Adaptor3d;
U1,V1, U2,V2: Real; Tol1,Tol2: Real)
is static;
IsDone (me) returns Boolean
---Purpose: Returns True if the distance is found.
is static;
SquareDistance (me) returns Real
---Purpose: Returns the value of the extremum square distance.
raises NotDone from StdFail
-- if IsDone(me)=False.
is static;
PointOnS1 (me) returns POnSurf
---Purpose: Returns the point of the extremum distance on S1.
---C++: return const&
raises NotDone from StdFail
-- if IsDone(me)=False.
is static;
PointOnS2 (me) returns POnSurf
---Purpose: Returns the point of the extremum distance on S2.
---C++: return const&
raises NotDone from StdFail
-- if IsDone(me)=False.
is static;
fields
myDone : Boolean;
mySqDist: Real;
myPoint1: POnSurf from Extrema;
myPoint2: POnSurf from Extrema;
end GenLocateExtSS;
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