PnSpline Class Reference

Represents a PnSpline(Polyhedral net Spline) composed of piecwise polynomial patches PnSPatch. More...

#include <PnSpline.hpp>

Public Member Functions
	PnSpline ()
	Construct an empty PnSpline.
	PnSpline (std::vector< std::array< double, 3 > > &controlPoints, std::vector< std::vector< uint32_t > > &controlIndices, bool degRaise=false)
	Construct a PnSpline from control net data.
	PnSpline (const PnSpline &other)
	Copy constructor.
PnSpline &	operator= (const PnSpline &other)
	Copy assignment operator.
	PnSpline (PnSpline &&other) noexcept
	Move constructor.
PnSpline &	operator= (PnSpline &&other) noexcept
	Move assignment operator.
	~PnSpline ()
	Destructor.
std::vector< uint32_t >	updateControlMesh (std::vector< std::array< double, 3 > > &updatedControlPoints, std::vector< uint32_t > &updateIndices)
	Update part of the control mesh.
void	degRaise ()
	Degree raise all patches upto degree 3 for each paramter. Degree greater than 3 will remain unchanged. This is not relevant for PnS3.
uint32_t	numPatches () const
	Get the number of patches in this PnSpline.
PnSPatch	getPatch (uint32_t index) const
	Access an individual patch by index.

Private Attributes
PnSplineImpl *	impl
	Opaque pointer to implementation (PIMPL idiom). This is to ensure binary compatibility.

Detailed Description

Represents a PnSpline(Polyhedral net Spline) composed of piecwise polynomial patches PnSPatch.

A PnSpline manages a collection of patches defined over a control mesh. It provides methods to update the underlying control structure efficiently without needing to reconstruct the entire surface, retrieve individual patches, and perform operations such as degree elevation.

This class uses the PIMPL idiom to ensure binary compatibility across different versions of the library. The member functions are inline functions that call binary safe C functions declared in PnSpline_impl.hpp.

Constructor & Destructor Documentation

PnSpline() [1/4]

PnSpline::PnSpline ( )

inline

Construct an empty PnSpline.

Only useful as a placeholder before assignment.

PnSpline() [2/4]

PnSpline::PnSpline ( std::vector< std::array< double, 3 > > & controlPoints, std::vector< std::vector< uint32_t > > & controlIndices, bool degRaise = false )

inline

Construct a PnSpline from control net data.

Parameters

controlPoints	3D positions of control points.
controlIndices	Connectivity information for the control mesh. Indices are 0-based. Orientation of the faces must be consistent.
degRaise	If true, degree raise all patches upto degree 3 for each paramter. Degree greater than 3 will remain unchanged. This is not relevant for PnS3.

Note

The PnSpline does not maintain any references to the input data but stores a copy. The input control points and indices can be safely deleted after construction.

PnSpline() [3/4]

PnSpline::PnSpline ( const PnSpline & other )

inline

Copy constructor.

Parameters

other

Another PnSpline to copy from.

PnSpline() [4/4]

PnSpline::PnSpline ( PnSpline && other )

inlinenoexcept

Move constructor.

Parameters

other

Another PnSpline to move from.

Member Function Documentation

getPatch()

PnSPatch PnSpline::getPatch ( uint32_t index ) const

inline

Access an individual patch by index.

Parameters

index

Patch index in the range [0, numPatches()).

Returns

A patch object.

Note

The patch must be retrieved again after any update.

numPatches()

uint32_t PnSpline::numPatches ( ) const

inline

Get the number of patches in this PnSpline.

Returns

Number of PnSPatch elements.

operator=() [1/2]

PnSpline & PnSpline::operator= ( const PnSpline & other )

inline

Copy assignment operator.

Parameters

other

Another PnSpline to copy from.

Returns

Reference to this PnSpline.

operator=() [2/2]

PnSpline & PnSpline::operator= ( PnSpline && other )

inlinenoexcept

Move assignment operator.

Parameters

other

Another PnSpline to move from.

Returns

Reference to this PnSpline.

updateControlMesh()

std::vector< uint32_t > PnSpline::updateControlMesh ( std::vector< std::array< double, 3 > > & updatedControlPoints, std::vector< uint32_t > & updateIndices )

inline

Update part of the control mesh.

Parameters

updatedControlPoints	New vertex positions.
updateIndices	Indices of the control points to update.

Returns

Indices of patches that were affected by the update.

This allows incremental updates without rebuilding the entire surface.

The patches affected be retieved using getPatch.

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

• src/api/PnSpline.hpp