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-- File: Extrema_GenLocateExtPS.cdl
-- Created: Tue Jul 18 08:22:37 1995
-- Author: Modelistation
-- <model@metrox>
---Copyright: Matra Datavision 1995
class GenLocateExtPS from Extrema
---Purpose: With a close point, it calculates the distance
-- between a point and a surface.
-- 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 GenLocateExtPS;
Create (P: Pnt; S: Surface from Adaptor3d; U0,V0: Real; TolU,TolV: Real)
returns GenLocateExtPS
---Purpose: Calculates the distance with a close point.
-- The close point is defined by the parameter values
-- U0 and V0.
-- The function F(u,v)=distance(S(u,v),p) has an
-- extremun when gradient(F)=0. The algorithm searchs
-- a zero near the close point.
raises DomainError;
-- if U0,V0 are outside the definition ranges of the
-- surface.
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;
Point (me) returns POnSurf
---Purpose: Returns the point of the extremum distance.
raises NotDone from StdFail
-- if IsDone(me)=False.
is static;
fields
myDone : Boolean;
mySqDist: Real;
myPoint: POnSurf from Extrema;
end GenLocateExtPS;
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