Open CASCADE Technology  6.5.4
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Public Member Functions | Protected Attributes
ShapeFix_Face Class Reference

This operator allows to perform various fixes on face
and its wires: fixes provided by ShapeFix_Wire,
fixing orientation of wires, addition of natural bounds,
fixing of missing seam edge,
and detection and removal of null-area wires

#include <ShapeFix_Face.hxx>

Inheritance diagram for ShapeFix_Face:
Inheritance graph
[legend]

Public Member Functions

 ShapeFix_Face ()
 Creates an empty tool

 ShapeFix_Face (const TopoDS_Face &face)
 Creates a tool and loads a face

virtual void ClearModes ()
 Sets all modes to default

void Init (const TopoDS_Face &face)
 Loads a whole face already created, with its wires, sense and
location

void Init (const Handle< Geom_Surface > &surf, const Standard_Real preci, const Standard_Boolean fwd=Standard_True)
 Starts the creation of the face
By default it will be FORWARD, or REVERSED if <fwd> is False

void Init (const Handle< ShapeAnalysis_Surface > &surf, const Standard_Real preci, const Standard_Boolean fwd=Standard_True)
 Starts the creation of the face
By default it will be FORWARD, or REVERSED if <fwd> is False

virtual void SetMsgRegistrator (const Handle< ShapeExtend_BasicMsgRegistrator > &msgreg)
 Sets message registrator

virtual void SetPrecision (const Standard_Real preci)
 Sets basic precision value (also to FixWireTool)

virtual void SetMinTolerance (const Standard_Real mintol)
 Sets minimal allowed tolerance (also to FixWireTool)

virtual void SetMaxTolerance (const Standard_Real maxtol)
 Sets maximal allowed tolerance (also to FixWireTool)

Standard_IntegerFixWireMode ()
 Returns (modifiable) the mode for applying fixes of
ShapeFix_Wire, by default True.

Standard_IntegerFixOrientationMode ()
 Returns (modifiable) the fix orientation mode, by default
True. If True, wires oriented to border limited square.

Standard_IntegerFixAddNaturalBoundMode ()
 Returns (modifiable) the add natural bound mode.
If true, natural boundary is added on faces that miss them.
Default is False for faces with single wire (they are
handled by FixOrientation in that case) and True for others.

Standard_IntegerFixMissingSeamMode ()
 Returns (modifiable) the fix missing seam mode, by default
True. If True, tries to insert seam is missed.

Standard_IntegerFixSmallAreaWireMode ()
 Returns (modifiable) the fix small area wire mode, by default
False. If True, drops small wires.

Standard_IntegerFixIntersectingWiresMode ()
 Returns (modifiable) the fix intersecting wires mode
by default True.

Standard_IntegerFixLoopWiresMode ()
 Returns (modifiable) the fix loop wires mode
by default True.

Standard_IntegerFixSplitFaceMode ()
 Returns (modifiable) the fix split face mode
by default True.

Standard_IntegerAutoCorrectPrecisionMode ()
 Returns (modifiable) the auto-correct precision mode
by default False.

Standard_IntegerFixPeriodicDegeneratedMode ()
 Returns (modifiable) the activation flag for periodic
degenerated fix. False by default.

TopoDS_Face Face () const
 Returns a face which corresponds to the current state
Warning: The finally produced face may be another one ... but with the
same support

TopoDS_Shape Result () const
 Returns resulting shape (Face or Shell if splitted)
To be used instead of Face() if FixMissingSeam involved

void Add (const TopoDS_Wire &wire)
 Add a wire to current face using BRep_Builder.
Wire is added without taking into account orientation of face
(as if face were FORWARD).

Standard_Boolean Perform ()
 Performs all the fixes, depending on modes
Function Status returns the status of last call to Perform()
ShapeExtend_OK : face was OK, nothing done
ShapeExtend_DONE1: some wires are fixed
ShapeExtend_DONE2: orientation of wires fixed
ShapeExtend_DONE3: missing seam added
ShapeExtend_DONE4: small area wire removed
ShapeExtend_DONE5: natural bounds added
ShapeExtend_FAIL1: some fails during fixing wires
ShapeExtend_FAIL2: cannot fix orientation of wires
ShapeExtend_FAIL3: cannot add missing seam
ShapeExtend_FAIL4: cannot remove small area wire

Standard_Boolean FixOrientation ()
 Fixes orientation of wires on the face
It tries to make all wires lie outside all others (according
to orientation) by reversing orientation of some of them.
If face lying on sphere or torus has single wire and
AddNaturalBoundMode is True, that wire is not reversed in
any case (supposing that natural bound will be added).
Returns True if wires were reversed

Standard_Boolean FixOrientation (TopTools_DataMapOfShapeListOfShape &MapWires)
 Fixes orientation of wires on the face
It tries to make all wires lie outside all others (according
to orientation) by reversing orientation of some of them.
If face lying on sphere or torus has single wire and
AddNaturalBoundMode is True, that wire is not reversed in
any case (supposing that natural bound will be added).
Returns True if wires were reversed
OutWires return information about out wires + list of
internal wires for each (for performing split face).

Standard_Boolean FixAddNaturalBound ()
 Adds natural boundary on face if it is missing.
Two cases are supported:

Standard_Boolean FixMissingSeam ()
 Detects and fixes the special case when face on a closed
surface is given by two wires closed in 3d but with gap in 2d.
In that case it creates a new wire from the two, and adds a
missing seam edge
Returns True if missing seam was added

Standard_Boolean FixSmallAreaWire ()
 Detects wires with small area (that is less than
100*Precision::PConfusion(). Removes these wires if they are internal.
Returns : True if at least one small wire removed,
False if does nothing.

Standard_Boolean FixLoopWire (TopTools_SequenceOfShape &aResWires)
 Detects if wire has a loop and fixes this situation by splitting on the few parts.
if wire has a loops and it was splitted Status was set to value ShapeExtend_DONE6.

Standard_Boolean FixIntersectingWires ()
 Detects and fixes the special case when face has more than one wire
and this wires have intersection point

Standard_Boolean FixWiresTwoCoincEdges ()
 If wire contains two coincidence edges it must be removed
Queries on status after Perform()

Standard_Boolean FixSplitFace (const TopTools_DataMapOfShapeListOfShape &MapWires)
 Split face if there are more than one out wire
using inrormation after FixOrientation()

Standard_Boolean FixPeriodicDegenerated ()
 Fixes topology for a specific case when face is composed
by a single wire belting a periodic surface. In that case
a degenerated edge is reconstructed in the degenerated pole
of the surface. Initial wire gets consistent orientation.
Must be used in couple and before FixMissingSeam routine

Standard_Boolean Status (const ShapeExtend_Status status) const
 Returns the status of last call to Perform()
ShapeExtend_OK : face was OK, nothing done
ShapeExtend_DONE1: some wires are fixed
ShapeExtend_DONE2: orientation of wires fixed
ShapeExtend_DONE3: missing seam added
ShapeExtend_DONE4: small area wire removed
ShapeExtend_DONE5: natural bounds added
ShapeExtend_DONE8: face may be splited
ShapeExtend_FAIL1: some fails during fixing wires
ShapeExtend_FAIL2: cannot fix orientation of wires
ShapeExtend_FAIL3: cannot add missing seam
ShapeExtend_FAIL4: cannot remove small area wire

Handle_ShapeFix_Wire FixWireTool ()
 Returns tool for fixing wires.

Protected Attributes

Handle_ShapeAnalysis_Surface mySurf
TopoDS_Face myFace
TopoDS_Shape myResult
Handle_ShapeFix_Wire myFixWire
Standard_Boolean myFwd
Standard_Integer myStatus

Constructor & Destructor Documentation


Member Function Documentation

virtual void ShapeFix_Face::ClearModes ( ) [virtual]
  • face has no wires
  • face lies on geometrically double-closed surface
    (sphere or torus) and none of wires is left-oriented
    Returns True if natural boundary was added
Handle_ShapeFix_Wire ShapeFix_Face::FixWireTool ( )
virtual void ShapeFix_Face::SetMaxTolerance ( const Standard_Real  maxtol) [virtual]

Reimplemented from ShapeFix_Root.

virtual void ShapeFix_Face::SetMinTolerance ( const Standard_Real  mintol) [virtual]

Reimplemented from ShapeFix_Root.

Reimplemented from ShapeFix_Root.

virtual void ShapeFix_Face::SetPrecision ( const Standard_Real  preci) [virtual]

Reimplemented from ShapeFix_Root.


Field Documentation

Handle_ShapeFix_Wire ShapeFix_Face::myFixWire [protected]
Handle_ShapeAnalysis_Surface ShapeFix_Face::mySurf [protected]

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