bezier Class Reference

Nth order bezier curve edge. Only interior control points should be specified. The outer points are taken as start and end. Note that the calculation of each point takes 0(N^2) time, where N is the number of control points. This edge type shouldn't therefore be used for finely discretised line data; polyLine or similar will be more appropriate for such cases. Beziers are useful for simple curved shapes such as aerofoils, or when you want an edge to match a specific direction at one, or both, or its endpoints. In comparison with BSplines, the grading of bezier edges should be smoother, and the code is much simpler. The algorithmic order is worse, however, and the edge will not follow the control points as closely. More...

Inheritance diagram for bezier:

Collaboration diagram for bezier:

Public Member Functions
	TypeName ("bezier")
	bezier (const pointField &, const label start, const label end, const pointField &control)
	Construct from components. More...
	bezier (const pointField &, Istream &)
	Construct from Istream. More...
virtual	~bezier ()
	Destructor. More...
point	position (const scalar lambda) const
	Return the point position corresponding to the curve parameter. More...
scalar	length () const
	Return the length of the curve. More...
Public Member Functions inherited from curvedEdge
	TypeName ("curvedEdge")
	Runtime type information. More...
	declareRunTimeSelectionTable (autoPtr, curvedEdge, Istream,(const pointField &points, Istream &is),(points, is))
	curvedEdge (const pointField &points, const label start, const label end)
	Construct from components. More...
	curvedEdge (const pointField &, Istream &)
	Construct from Istream setting pointsList. More...
	curvedEdge (const curvedEdge &)
	Copy construct. More...
virtual autoPtr< curvedEdge >	clone () const
	Clone function. More...
virtual	~curvedEdge ()
	Destructor. More...
label	start () const
	Return label of start point. More...
label	end () const
	Return label of end point. More...
int	compare (const curvedEdge &) const
	Compare the given start and end points with this curve. More...
int	compare (const edge &) const
	Compare the given start and end points with this curve. More...
int	compare (const label start, const label end) const
	Compare the given start and end points with this curve. More...
void	operator= (const curvedEdge &)

Private Member Functions
	bezier (const bezier &)
	Disallow default bitwise copy construct. More...
void	operator= (const bezier &)
	Disallow default bitwise assignment. More...

Private Attributes
pointField	control_
	Control points. More...

Additional Inherited Members
Static Public Member Functions inherited from curvedEdge
static autoPtr< curvedEdge >	New (const pointField &, Istream &)
	New function which constructs and returns pointer to a curvedEdge. More...
Static Protected Member Functions inherited from curvedEdge
static pointField	appendEndPoints (const pointField &, const label start, const label end, const pointField &otherKnots)
	Return a complete point field by appending the start/end points. More...
Protected Attributes inherited from curvedEdge
const pointField &	points_
const label	start_
const label	end_

Detailed Description

Nth order bezier curve edge. Only interior control points should be specified. The outer points are taken as start and end. Note that the calculation of each point takes 0(N^2) time, where N is the number of control points. This edge type shouldn't therefore be used for finely discretised line data; polyLine or similar will be more appropriate for such cases. Beziers are useful for simple curved shapes such as aerofoils, or when you want an edge to match a specific direction at one, or both, or its endpoints. In comparison with BSplines, the grading of bezier edges should be smoother, and the code is much simpler. The algorithmic order is worse, however, and the edge will not follow the control points as closely.

Source files

• bezier.H
• bezier.C

Definition at line 57 of file bezier.H.

Constructor & Destructor Documentation

bezier() [1/3]

bezier ( const bezier &  )

private

Disallow default bitwise copy construct.

bezier() [2/3]

bezier	(	const pointField &	ps,
		const label	start,
		const label	end,
		const pointField &	control
	)

Construct from components.

Definition at line 42 of file bezier.C.

bezier() [3/3]

bezier	(	const pointField &	ps,
		Istream &	is
	)

Construct from Istream.

Definition at line 54 of file bezier.C.

~bezier()

~bezier ( )

virtual

Destructor.

Definition at line 63 of file bezier.C.

Member Function Documentation

operator=()

void operator= ( const bezier &  )

private

Disallow default bitwise assignment.

TypeName()

TypeName

(

"bezier"

)

position()

Foam::point position ( const scalar  lambda ) const

virtual

Return the point position corresponding to the curve parameter.

0 <= lambda <= 1

Implements curvedEdge.

Definition at line 69 of file bezier.C.

References UList::assign(), forAll, and lambda().

Here is the call graph for this function:

length()

Foam::scalar length ( ) const

virtual

Return the length of the curve.

Implements curvedEdge.

Definition at line 90 of file bezier.C.

References NotImplemented.

Field Documentation

control_

pointField control_

private

Control points.

Definition at line 64 of file bezier.H.

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

• src/mesh/blockMesh/curvedEdges/bezier.H
• src/mesh/blockMesh/curvedEdges/bezier.C