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Public Member Functions
BRepOffsetAPI_DraftAngle Class Reference

Taper-adding transformations on a shape.
The resulting shape is constructed by defining one face
to be tapered after another one, as well as the
geometric properties of their tapered transformation.
Each tapered transformation is propagated along the
series of faces which are tangential to one another and
which contains the face to be tapered.
This algorithm is useful in the construction of molds or
dies. It facilitates the removal of the article being produced.
A DraftAngle object provides a framework for:
More...

#include <BRepOffsetAPI_DraftAngle.hxx>

Inheritance diagram for BRepOffsetAPI_DraftAngle:
Inheritance graph
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Public Member Functions

DEFINE_STANDARD_ALLOC BRepOffsetAPI_DraftAngle ()
 Constructs an empty algorithm to perform
taper-adding transformations on faces of a shape.
Use the Init function to define the shape to be tapered.

 BRepOffsetAPI_DraftAngle (const TopoDS_Shape &S)
 Initializes an algorithm to perform taper-adding
transformations on faces of the shape S.
S will be referred to as the initial shape of the algorithm.

void Clear ()
 Cancels the results of all taper-adding transformations
performed by this algorithm on the initial shape. These
results will have been defined by successive calls to the function Add.

void Init (const TopoDS_Shape &S)
 Initializes, or reinitializes this taper-adding algorithm with the shape S.
S will be referred to as the initial shape of this algorithm.

void Add (const TopoDS_Face &F, const gp_Dir &Direction, const Standard_Real Angle, const gp_Pln &NeutralPlane, const Standard_Boolean Flag=Standard_True)
 Adds the face F, the direction
Direction, the angle Angle, the plane NeutralPlane, and the flag
Flag to the framework created at construction time, and with this
data, defines the taper-adding transformation.
F is a face, which belongs to the initial shape of this algorithm or
to the shape loaded by the function Init.
Only planar, cylindrical or conical faces can be tapered:

Standard_Boolean AddDone () const
 Returns true if the previous taper-adding
transformation performed by this algorithm in the last
call to Add, was successful.
If AddDone returns false:

void Remove (const TopoDS_Face &F)
 Cancels the taper-adding transformation previously
performed by this algorithm on the face F and the
series of tangential faces which contain F, and retrieves
the shape before the last taper-adding transformation.
Warning
You will have to use this function if the previous call to
Add fails. Use the function AddDone to check it.
Exceptions

const TopoDS_ShapeProblematicShape () const
 Returns the shape on which an error occurred after an
unsuccessful call to Add or when IsDone returns false.
Exceptions
Standard_NullObject if the initial shape has not been
defined, i.e. if this algorithm has not been initialized with
the non-empty constructor or the Init function.

Draft_ErrorStatus Status () const
 Returns an error status when an error has occured
(Face, Edge or Vertex recomputaion problem).
Otherwise returns Draft_NoError. The method may be
called if AddDone returns Standard_False, or when
IsDone returns Standard_False.

const TopTools_ListOfShapeConnectedFaces (const TopoDS_Face &F) const
 Returns all the faces which have been added
together with the face <F>.


const TopTools_ListOfShapeModifiedFaces () const
 Returns all the faces on which a modification has
been given.


virtual void Build ()
 Builds the resulting shape (redefined from MakeShape).

void CorrectWires ()
virtual const
TopTools_ListOfShape
Generated (const TopoDS_Shape &S)
 Returns the list of shapes generated from the
shape <S>.

virtual const
TopTools_ListOfShape
Modified (const TopoDS_Shape &S)
 Returns the list of shapes modified from the shape
<S>.


Detailed Description


Constructor & Destructor Documentation


Member Function Documentation

  • If the face F is planar, it is tapered by inclining it
    through the angle Angle about the line of intersection between the
    plane NeutralPlane and F.
    Direction indicates the side of NeutralPlane from which matter is
    removed if Angle is positive or added if Angle is negative.
  • If F is cylindrical or conical, it is transformed in the
    same way on a single face, resulting in a conical face if F
    is cylindrical, and a conical or cylindrical face if it is already conical.
    The taper-adding transformation is propagated from the face F along
    the series of planar, cylindrical or conical faces containing F,
    which are tangential to one another.
    Use the function AddDone to check if this taper-adding transformation is successful.
    Warning
    Nothing is done if:
  • the face F does not belong to the initial shape of this algorithm, or
  • the face F is not planar, cylindrical or conical.
    Exceptions
  • Standard_NullObject if the initial shape is not
    defined, i.e. if this algorithm has not been initialized
    with the non-empty constructor or the Init function.
  • Standard_ConstructionError if the previous call to
    Add has failed. The function AddDone ought to have
    been used to check for this, and the function Remove
    to cancel the results of the unsuccessful taper-adding
    transformation and to retrieve the previous shape.
  • the function ProblematicShape returns the face
    on which the error occurred,
  • the function Remove has to be used to cancel the
    results of the unsuccessful taper-adding
    transformation and to retrieve the previous shape.
    Exceptions
    Standard_NullObject if the initial shape has not
    been defined, i.e. if this algorithm has not been
    initialized with the non-empty constructor or the .Init function.
virtual void BRepOffsetAPI_DraftAngle::Build ( ) [virtual]

Reimplemented from BRepBuilderAPI_MakeShape.

Reimplemented from BRepBuilderAPI_MakeShape.

Reimplemented from BRepBuilderAPI_ModifyShape.

  • Standard_NullObject if the initial shape has not
    been defined, i.e. if this algorithm has not been
    initialized with the non-empty constructor or the Init function.
  • Standard_NoSuchObject if F has not been added
    or has already been removed.

The documentation for this class was generated from the following file: