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GeomFill_Pipe Class Reference

Describes functions to construct pipes. A pipe is built by
sweeping a curve (the section) along another curve (the path).
The Pipe class provides the following types of construction:
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#include <GeomFill_Pipe.hxx>

Public Member Functions

DEFINE_STANDARD_ALLOC GeomFill_Pipe ()
 Constructs an empty algorithm for building pipes. Use
the function Init to initialize it.

 GeomFill_Pipe (const Handle< Geom_Curve > &Path, const Standard_Real Radius)
 GeomFill_Pipe (const Handle< Geom_Curve > &Path, const Handle< Geom_Curve > &FirstSect, const GeomFill_Trihedron Option=GeomFill_IsCorrectedFrenet)
 Create a pipe with a constant section
(<FirstSection>) and a path (<Path>)
Option can be - GeomFill_IsCorrectedFrenet

 GeomFill_Pipe (const Handle< Geom2d_Curve > &Path, const Handle< Geom_Surface > &Support, const Handle< Geom_Curve > &FirstSect)
 Create a pipe with a constant section
(<FirstSection>) and a path defined by <Path> and <Support>

 GeomFill_Pipe (const Handle< Geom_Curve > &Path, const Handle< Geom_Curve > &FirstSect, const gp_Dir &Dir)
 Create a pipe with a constant section
(<FirstSection>) and a path <Path> and a fixed
binormal direction <Dir>

 GeomFill_Pipe (const Handle< Geom_Curve > &Path, const Handle< Geom_Curve > &FirstSect, const Handle< Geom_Curve > &LastSect)
 Create a pipe with an evolving section
The section evoluate from First to Last Section

 GeomFill_Pipe (const Handle< Geom_Curve > &Path, const TColGeom_SequenceOfCurve &NSections)
 Create a pipe with N sections
The section evoluate from First to Last Section

 GeomFill_Pipe (const Handle< Geom_Curve > &Path, const Handle< Geom_Curve > &Curve1, const Handle< Geom_Curve > &Curve2, const Standard_Real Radius)
 Create a pipe with a constant radius with 2
guide-line.

 GeomFill_Pipe (const Handle< Adaptor3d_HCurve > &Path, const Handle< Adaptor3d_HCurve > &Curve1, const Handle< Adaptor3d_HCurve > &Curve2, const Standard_Real Radius)
 Create a pipe with a constant radius with 2
guide-line.

 GeomFill_Pipe (const Handle< Geom_Curve > &Path, const Handle< Adaptor3d_HCurve > &Guide, const Handle< Geom_Curve > &FirstSect, const Standard_Boolean ByACR, const Standard_Boolean rotat)
 Create a pipe with a constant section and with 1
guide-line.
Use the function Perform to build the surface.
All standard specific cases are detected in order to
construct, according to the respective geometric
nature of Path and the sections, a planar, cylindrical,
conical, spherical or toroidal surface, a surface of
linear extrusion or a surface of revolution.
In the general case, the result is a BSpline surface
(NURBS) built by approximation of a series of sections where:

void Init (const Handle< Geom_Curve > &Path, const Standard_Real Radius)
void Init (const Handle< Geom_Curve > &Path, const Handle< Geom_Curve > &FirstSect, const GeomFill_Trihedron Option=GeomFill_IsCorrectedFrenet)
void Init (const Handle< Geom2d_Curve > &Path, const Handle< Geom_Surface > &Support, const Handle< Geom_Curve > &FirstSect)
void Init (const Handle< Geom_Curve > &Path, const Handle< Geom_Curve > &FirstSect, const gp_Dir &Dir)
void Init (const Handle< Geom_Curve > &Path, const Handle< Geom_Curve > &FirstSect, const Handle< Geom_Curve > &LastSect)
void Init (const Handle< Geom_Curve > &Path, const TColGeom_SequenceOfCurve &NSections)
void Init (const Handle< Adaptor3d_HCurve > &Path, const Handle< Adaptor3d_HCurve > &Curve1, const Handle< Adaptor3d_HCurve > &Curve2, const Standard_Real Radius)
 Create a pipe with a constant radius with 2
guide-line.

void Init (const Handle< Geom_Curve > &Path, const Handle< Adaptor3d_HCurve > &Guide, const Handle< Geom_Curve > &FirstSect, const Standard_Boolean ByACR, const Standard_Boolean rotat)
 Initializes this pipe algorithm to build the following surface:

void Perform (const Standard_Boolean WithParameters=Standard_False, const Standard_Boolean myPolynomial=Standard_False)
 Builds the pipe defined at the time of initialization of this
algorithm. A description of the resulting surface is given under Constructors.
If WithParameters (defaulted to false) is set to true, the
approximation algorithm (used only in the general case
of construction of a BSpline surface) builds the surface
with a u parameter corresponding to the one of the path.
Exceptions
Standard_ConstructionError if a surface cannot be constructed from the data.
Warning: It is the old Perform method, the next methode is recommended.

void Perform (const Standard_Real Tol, const Standard_Boolean Polynomial, const GeomAbs_Shape Conti=GeomAbs_C1, const Standard_Integer MaxDegree=11, const Standard_Integer NbMaxSegment=30)
 detects the particular cases. And compute the surface.
if none particular case is detected we make an approximation
with respect of the Tolerance <Tol>, the continuty <Conti>, the
maximum degree <MaxDegree>, the maximum number of span <NbMaxSegment>
and the spine parametrization.
//! If we can't create a surface with the data

const Handle_Geom_Surface & Surface () const
 Returns the surface built by this algorithm.
Warning
Do not use this function before the surface is built (in this
case the function will return a null handle).

Standard_Boolean ExchangeUV () const
 The u parametric direction of the surface constructed by
this algorithm usually corresponds to the evolution
along the path and the v parametric direction
corresponds to the evolution along the section(s).
However, this rule is not respected when constructing
certain specific Geom surfaces (typically cylindrical
surfaces, surfaces of revolution, etc.) for which the
parameterization is inversed.
The ExchangeUV function checks for this, and returns
true in all these specific cases.
Warning
Do not use this function before the surface is built.

void GenerateParticularCase (const Standard_Boolean B)
 Sets a flag to try to create as many planes,
cylinder,... as possible. Default value is
<Standard_False>.

Standard_Boolean GenerateParticularCase () const
 Returns the flag.

Standard_Real ErrorOnSurf () const
 Returns the approximation's error. if the Surface
is plane, cylinder ... this error can be 0.


Detailed Description


Constructor & Destructor Documentation

  • GeomFill_IsFrenet
  • GeomFill_IsConstant
GeomFill_Pipe::GeomFill_Pipe ( const Handle< Geom_Curve > &  Path,
const Handle< Geom_Curve > &  FirstSect,
const gp_Dir Dir 
)
GeomFill_Pipe::GeomFill_Pipe ( const Handle< Geom_Curve > &  Path,
const Handle< Geom_Curve > &  FirstSect,
const Handle< Geom_Curve > &  LastSect 
)
  • the number of sections N is chosen automatically
    by the algorithm according to the respective
    geometries of Path and the sections. N is greater than or equal to 2;
  • N points Pi (with i in the range [ 1,N ]) are
    defined at regular intervals along the curve Path
    from its first point to its end point. At each point Pi,
    a coordinate system Ti is computed with Pi as
    origin, and with the tangential and normal vectors
    to Path defining two of its coordinate axes.
    In the case of a pipe with a constant circular section,
    the first section is a circle of radius Radius centered
    on the origin of Path and whose "Z Axis" is aligned
    along the vector tangential to the origin of Path. In the
    case of a pipe with a constant section, the first section
    is the curve FirstSect. In these two cases, the ith
    section (for values of i greater than 1) is obtained by
    applying to a copy of this first section the geometric
    transformation which transforms coordinate system
    T1 into coordinate system Ti.
    In the case of an evolving section, N-2 intermediate
    curves Si are first computed (if N is greater than 2,
    and with i in the range [ 2,N-1 ]) whose geometry
    evolves regularly from the curve S1=FirstSect to the
    curve SN=LastSect. The first section is FirstSect,
    and the ith section (for values of i greater than 1) is
    obtained by applying to the curve Si the geometric
    transformation which transforms coordinate system
    T1 into coordinate system Ti.

Member Function Documentation

void GeomFill_Pipe::Init ( const Handle< Geom2d_Curve > &  Path,
const Handle< Geom_Surface > &  Support,
const Handle< Geom_Curve > &  FirstSect 
)
void GeomFill_Pipe::Init ( const Handle< Geom_Curve > &  Path,
const Handle< Geom_Curve > &  FirstSect,
const gp_Dir Dir 
)
void GeomFill_Pipe::Init ( const Handle< Geom_Curve > &  Path,
const Handle< Geom_Curve > &  FirstSect,
const Handle< Geom_Curve > &  LastSect 
)
  • a pipe with a constant circular section of radius
    Radius along the path Path, or
  • a pipe with constant section FirstSect along the path Path, or
  • a pipe where the section evolves from FirstSect to
    LastSect along the path Path.
    Use the function Perform to build the surface.
    Note: a description of the resulting surface is given under Constructors.
void GeomFill_Pipe::Perform ( const Standard_Real  Tol,
const Standard_Boolean  Polynomial,
const GeomAbs_Shape  Conti = GeomAbs_C1,
const Standard_Integer  MaxDegree = 11,
const Standard_Integer  NbMaxSegment = 30 
)
const Handle_Geom_Surface& GeomFill_Pipe::Surface ( ) const

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