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-- File: FaceExplorer.cdl
-- Created: Tue Nov 17 16:39:19 1992
-- Author: Remi LEQUETTE
-- <rle@phylox>
---Copyright: Matra Datavision 1992
deferred generic class FaceExplorer from TopClass
(TheEdge as any)
---Purpose: Describe an exploration of a 2D face suitable for
-- classification.
uses
Orientation from TopAbs,
Pnt2d from gp,
Lin2d from gp
is
Reject(me; P : Pnt2d from gp) returns Boolean
---Purpose: Should return True if the point is outside a
-- bounding volume of the face.
is deferred;
Segment(me; P : Pnt2d from gp;
L : out Lin2d from gp; Par : out Real)
---Purpose: Returns in <L>, <Par> a segment having at least
-- one intersection with the face boundary to
-- compute intersections.
is deferred;
InitWires(me : in out)
---Purpose: Starts an exploration of the wires.
is deferred;
MoreWires(me) returns Boolean
---Purpose: Returns True if there is a current wire.
---C++: inline
is deferred;
NextWire(me : in out)
---Purpose: Sets the explorer to the next wire and returns
-- False if there are no more wires.
is deferred;
RejectWire(me; L : Lin2d from gp; Par : Real) returns Boolean
---Purpose: Returns True if the wire bounding volume does not
-- intersect the segment.
is deferred;
InitEdges(me : in out)
---Purpose: Starts an exploration of the edges of the current
-- wire.
is deferred;
MoreEdges(me) returns Boolean
---Purpose: Returns True if there is a current edge.
---C++: inline
is deferred;
NextEdge(me : in out)
---Purpose: Sets the explorer to the next wire and returns
-- False if there are no more wires.
is deferred;
RejectEdge(me; L : Lin2d from gp; Par : Real) returns Boolean
---Purpose: Returns True if the edge bounding volume does not
-- intersect the segment.
is deferred;
CurrentEdge(me; E : out TheEdge; Or : out Orientation from TopAbs)
---Purpose: Curent edge in current wire and its orientation
is deferred;
end FaceExplorer;
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