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-- File: Geom2dAPI_ProjectPointOnCurve.cdl
-- Created: Wed Mar 23 15:03:16 1994
-- Author: Bruno DUMORTIER
-- <dub@fuegox>
---Copyright: Matra Datavision 1994
class ProjectPointOnCurve from Geom2dAPI
---Purpose:
-- This class implements methods for computing all the orthogonal
-- projections of a 2D point onto a 2D curve.
uses
Curve from Geom2d,
Curve from Geom2dAdaptor,
ExtPC2d from Extrema,
Pnt2d from gp,
Length from Quantity,
Parameter from Quantity
raises
OutOfRange from Standard,
NotDone from StdFail
is
Create
---Purpose: Constructs an empty projector algorithm. Use an Init
-- function to define the point and the curve on which it is going to work.
returns ProjectPointOnCurve from Geom2dAPI;
Create(P : Pnt2d from gp;
Curve : Curve from Geom2d)
---Purpose: Create the projection of a point <P> on a curve
-- <Curve>
---Level: Public
returns ProjectPointOnCurve from Geom2dAPI;
Create(P : Pnt2d from gp;
Curve : Curve from Geom2d;
Umin, Usup : Parameter from Quantity)
---Purpose: Create the projection of a point <P> on a curve
-- <Curve> limited by the two points of parameter Umin and Usup.
-- Warning
-- Use the function NbPoints to obtain the number of solutions. If
-- projection fails, NbPoints returns 0.
returns ProjectPointOnCurve from Geom2dAPI;
Init(me : in out;
P : Pnt2d from gp;
Curve : Curve from Geom2d)
---Purpose: Initializes this algorithm with the given arguments, and
-- computes the orthogonal projections of a point <P> on a curve <Curve>
is static;
Init(me : in out;
P : Pnt2d from gp;
Curve : Curve from Geom2d;
Umin, Usup : Parameter from Quantity)
---Purpose: Initializes this algorithm with the given arguments, and
-- computes the orthogonal projections of the point P onto the portion
-- of the curve Curve limited by the two points of parameter Umin and Usup.
is static;
NbPoints(me)
---Purpose: return the number of of computed
-- orthogonal projectionn points.
returns Integer from Standard
---C++: alias "Standard_EXPORT operator Standard_Integer() const;"
is static;
Point(me; Index : Integer from Standard)
returns Pnt2d from gp
---Purpose: Returns the orthogonal projection
-- on the curve. Index is a number of a computed point.
-- Exceptions
-- Standard_OutOfRange if Index is not in the range [ 1,NbPoints ], where
-- NbPoints is the number of solution points.
raises
OutOfRange from Standard
is static;
Parameter(me; Index : Integer from Standard)
returns Parameter from Quantity
---Purpose: Returns the parameter on the curve
-- of a point which is the orthogonal projection. Index is a number of a
-- computed projected point.
-- Exceptions
-- Standard_OutOfRange if Index is not in the range [ 1,NbPoints ], where
-- NbPoints is the number of solution points.
raises
OutOfRange from Standard
is static;
Parameter(me; Index : Integer from Standard;
U : out Parameter from Quantity)
---Purpose: Returns the parameter on the curve
-- of a point which is the orthogonal projection. Index is a number of a
-- computed projected point.
-- Exceptions
-- Standard_OutOfRange if Index is not in the range [ 1,NbPoints ], where
-- NbPoints is the number of solution points
raises
OutOfRange from Standard
is static;
Distance(me; Index : Integer from Standard)
returns Length from Quantity
---Purpose: Computes the distance between the
-- point and its computed orthogonal projection on the curve. Index is a
-- number of computed projected point.
-- Exceptions
-- Standard_OutOfRange if Index is not in the range [ 1,NbPoints ], where
-- NbPoints is the number of solution points.
raises
OutOfRange from Standard
is static;
NearestPoint(me)
returns Pnt2d from gp
---Purpose: Returns the nearest orthogonal projection of the point on the curve.
-- Exceptions
-- StdFail_NotDone if this algorithm fails.
---C++: alias "Standard_EXPORT operator gp_Pnt2d() const;"
raises
NotDone from StdFail
is static;
LowerDistanceParameter(me)
returns Parameter from Quantity
---Purpose: Returns the parameter on the curve
-- of the nearest orthogonal projection of the point.
-- Exceptions
-- StdFail_NotDone if this algorithm fails.
raises
NotDone from StdFail
is static;
LowerDistance(me)
---Purpose: Computes the distance between the
-- point and its nearest orthogonal projection on the curve.
-- Exceptions
-- StdFail_NotDone if this algorithm fails.
returns Length from Quantity
---C++: alias "Standard_EXPORT operator Standard_Real() const;"
raises
NotDone from StdFail
is static;
Extrema(me)
---Purpose: return the algorithmic object from Extrema
---Level: Advanced
---C++: return const&
---C++: inline
returns ExtPC2d from Extrema
is static;
fields
myIsDone: Boolean from Standard;
myIndex : Integer from Standard; -- index of the nearest solution
myExtPC : ExtPC2d from Extrema;
myC : Curve from Geom2dAdaptor;
end ProjectPointOnCurve;
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