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-- File: BRepOffsetAPI_NormalProjection.cdl
-- Created: Mon Oct 13 16:14:20 1997
-- Author: Roman BORISOV
-- <rbv@velox.nnov.matra-dtv.fr>
---Copyright: Matra Datavision 1997
class NormalProjection from BRepOffsetAPI inherits MakeShape from BRepBuilderAPI
---Purpose: A framework to define projection onto a shape
-- according to the normal from each point to be projected.
-- The target shape is a face, and the source shape is an edge or a wire.
-- The target face is considered to be a 2D surface.
uses Shape from TopoDS,
Edge from TopoDS,
Shape from GeomAbs,
NormalProjection from BRepAlgo,
ListOfShape from TopTools
raises ConstructionError from Standard,
NoSuchObject from Standard,
NotDone from StdFail
is
Create
---Purpose: Constructs an empty framework to define projection on
-- a shape according to the normal from each point to be
-- projected to the shape.
returns NormalProjection;
Create(S: Shape from TopoDS)
returns NormalProjection;
---Purpose: Constructs a framework to define projection onto the
-- basis shape S according to the normal from each point
-- to be projected from the shape added to this framework by Add.
-- Default parameters of the algorithm: Tol3D = 1.e-04, Tol2D =sqr(tol3d)
-- , InternalContinuity = GeomAbs_C2, MaxDegree = 14, MaxSeg = 16.
Init(me: in out; S: Shape from TopoDS)
---Purpose: Initializes the empty constructor framework with the shape S.
is static;
Add(me: in out; ToProj: Shape from TopoDS)
---Purpose: Adds the shape ToProj to the framework for calculation
-- of the projection by Compute3d.
-- ToProj is an edge or a wire and will be projected onto the basis shape.
-- Exceptions
-- Standard_ConstructionError if ToProj is not added.
raises ConstructionError from Standard
is static;
SetParams(me : in out; Tol3D, Tol2D : Real from Standard;
InternalContinuity : Shape from GeomAbs;
MaxDegree , MaxSeg : Integer from Standard)
---Purpose: Sets the parameters used for computation
-- Tol3 is the requiered tolerance between the 3d projected
-- curve and its 2d representation
-- InternalContinuity is the order of constraints
-- used for approximation
-- MaxDeg and MaxSeg are the maximum degree and the maximum
-- number of segment for BSpline resulting of an approximation.
is static;
SetMaxDistance(me: in out; MaxDist: Real from Standard)
---Purpose: Sets the maximum distance between target shape and
-- shape to project. If this condition is not satisfied then corresponding
-- part of solution is discarded.
-- if MaxDist < 0 then this method does not affect the algorithm
is static;
SetLimit(me : in out; FaceBoundaries: Boolean from Standard = Standard_True)
---Purpose: Manage limitation of projected edges.
--By default edges are limited by face boundaries,
--else they are limited by supporting surface boundaries.
is static;
Compute3d(me: in out; With3d: Boolean from Standard = Standard_True)
---Purpose: Returns true if a 3D curve is computed. If not, false is
-- returned and an initial 3D curve is kept to build the resulting edges.
is static;
Build(me: in out)
is redefined;
---Purpose: Builds the result of the projection as a compound of
-- wires. Tries to build oriented wires.
IsDone(me)
---Purpose:
returns Boolean from Standard
is redefined static;
---Purpose: Returns true if the object was correctly built by the shape
-- construction algorithm.
-- If at the construction time of the shape, the algorithm
-- cannot be completed, or the original data is corrupted,
-- IsDone returns false and therefore protects the use of
-- functions to access the result of the construction
-- (typically the Shape function).
Projection(me)
---Purpose: Performs the projection.
-- The construction of the result is performed by Build.
-- Exceptions
-- StdFail_NotDone if the projection was not performed.
returns Shape from TopoDS
---C++: return const&
raises NotDone from StdFail
is static;
Couple(me; E: Edge from TopoDS)
---Purpose: Returns the initial face corresponding to the projected edge E.
-- Exceptions
-- StdFail_NotDone if no face was found.
-- Standard_NoSuchObject if if a face corresponding to
-- E has already been found.
returns Shape from TopoDS
---C++: return const&
raises NotDone from StdFail,
NoSuchObject from Standard
is static;
Generated (me: in out; S : Shape from TopoDS)
---Purpose: Returns the list of shapes generated from the
-- shape <S>.
---C++: return const &
---Level: Public
returns ListOfShape from TopTools
is redefined;
Ancestor(me; E: Edge from TopoDS)
---Purpose: Returns the initial edge corresponding to the edge E
-- resulting from the computation of the projection.
-- Exceptions
-- StdFail_NotDone if no edge was found.
-- Standard_NoSuchObject if an edge corresponding to
-- E has already been found.
returns Shape from TopoDS
---C++: return const&
raises NotDone from StdFail,
NoSuchObject from Standard
is static;
BuildWire(me; Liste : out ListOfShape from TopTools)
returns Boolean from Standard
is static;
--- Purpose : build the result as a list of wire if possible in --
-- a first returns a wire only if there is only a wire.
fields
myNormalProjector : NormalProjection from BRepAlgo;
end NormalProjection;
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