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-- File: TopClass_Intersection3d.cdl
-- Created: Wed Mar 30 14:37:00 1994
-- Author: Laurent BUCHARD
-- <lbr@fuegox>
---Copyright: Matra Datavision 1994
deferred class Intersection3d from TopClass
---Purpose: Template class for the intersection algorithm required
-- by the 3D classifications.
--
-- (a intersection point near the origin of the line, ie.
-- at a distance less or equal than <tolerance>, will be
-- returned even if it has a negative parameter.)
--
uses
Lin from gp,
Pnt from gp,
Face from TopoDS,
State from TopAbs,
IntersectionPoint from IntCurveSurface
is
Initialize;
---Purpose: Empty constructor.
Perform(me: in out; L : Lin from gp;
Prm : Real from Standard;
Tol : Real from Standard;
Face : Face from TopoDS)
---Purpose: Perform the intersection between the
-- segment L(0) ... L(Prm) and the Face <Face>.
--
-- Only the point with the smallest parameter on the
-- line is returned.
--
-- The Tolerance <Tol> is used to determine if the
-- first point of the segment is near the face. In
-- that case, the parameter of the intersection point
-- on the line can be a negative value (greater than -Tol).
is deferred;
IsDone(me)
---Purpose: True is returned when the intersection have been computed.
returns Boolean from Standard
is deferred;
HasAPoint(me)
---Purpose: True is returned if a point has been found.
returns Boolean from Standard
is deferred;
Point(me)
---Purpose: Returns the Intersection Point.
--
---C++: return const &
returns IntersectionPoint from IntCurveSurface
is deferred;
State(me)
---Purpose: Returns the state of the point on the face.
-- The values can be either TopAbs_IN
-- ( the point is in the face)
-- or TopAbs_ON
-- ( the point is on a boudary of the face).
returns State from TopAbs
is deferred;
---------------------- Loacl Geometry avec courbureS dans une
-- direction et la direction normale
end Intersection3d;
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