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-- File: MakeArcOfCircle.cdl
-- Created: Mon Sep 28 11:50:14 1992
-- Author: Remi GILET
-- <reg@sdsun2>
---Copyright: Matra Datavision 1992
class MakeArcOfCircle from GC inherits Root from GC
---Purpose: Implements construction algorithms for an
-- arc of circle in 3D space. The result is a Geom_TrimmedCurve curve.
-- A MakeArcOfCircle object provides a framework for:
-- - defining the construction of the arc of circle,
-- - implementing the construction algorithm, and
-- - consulting the results. In particular, the
-- Value function returns the constructed arc of circle.
uses Pnt from gp,
Circ from gp,
Dir from gp,
Ax1 from gp,
Vec from gp,
Real from Standard,
TrimmedCurve from Geom
raises NotDone from StdFail
is
Create(Circ : Circ from gp ;
Alpha1, Alpha2 : Real from Standard ;
Sense : Boolean from Standard ) returns MakeArcOfCircle;
---Purpose: Make an arc of circle (TrimmedCurve from Geom) from
-- a circle between two angles Alpha1 and Alpha2
-- given in radiians.
Create(Circ : Circ from gp ;
P : Pnt from gp ;
Alpha : Real from Standard ;
Sense : Boolean from Standard ) returns MakeArcOfCircle;
---Purpose: Make an arc of circle (TrimmedCurve from Geom) from
-- a circle between point <P> and the angle Alpha
-- given in radians.
Create(Circ : Circ from gp ;
P1 : Pnt from gp ;
P2 : Pnt from gp ;
Sense : Boolean from Standard ) returns MakeArcOfCircle;
---Purpose: Make an arc of circle (TrimmedCurve from Geom) from
-- a circle between two points P1 and P2.
Create(P1 : Pnt from gp ;
P2 : Pnt from gp ;
P3 : Pnt from gp )
returns MakeArcOfCircle;
---Purpose: Make an arc of circle (TrimmedCurve from Geom) from
-- three points P1,P2,P3 between two points P1 and P2.
Create(P1 : Pnt from gp ;
V : Vec from gp ;
P2 : Pnt from gp )
returns MakeArcOfCircle;
---Purpose: Make an arc of circle (TrimmedCurve from Geom) from
-- two points P1,P2 and the tangente to the solution at
-- the point P1.
-- The orientation of the arc is:
-- - the sense determined by the order of the points P1, P3 and P2;
-- - the sense defined by the vector V; or
-- - for other syntaxes:
-- - the sense of Circ if Sense is true, or
-- - the opposite sense if Sense is false.
-- Note: Alpha1, Alpha2 and Alpha are angle values, given in radians.
-- Warning
-- If an error occurs (that is, when IsDone returns
-- false), the Status function returns:
-- - gce_ConfusedPoints if:
-- - any 2 of the 3 points P1, P2 and P3 are coincident, or
-- - P1 and P2 are coincident; or
-- - gce_IntersectionError if:
-- - P1, P2 and P3 are collinear and not coincident, or
-- - the vector defined by the points P1 and
-- P2 is collinear with the vector V.
Value(me) returns TrimmedCurve from Geom
raises NotDone
is static;
---Purpose: Returns the constructed arc of circle.
-- Exceptions StdFail_NotDone if no arc of circle is constructed.
---C++: return const&
Operator(me) returns TrimmedCurve from Geom
is static;
---C++: return const&
---C++: alias "Standard_EXPORT operator Handle_Geom_TrimmedCurve() const;"
fields
TheArc : TrimmedCurve from Geom;
--The solution from Geom.
end MakeArcOfCircle;
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