Go::SplineSurfaceInt Class Reference
[Intersections]

This class represents the "intersection object" of a spline surface. More...

#include <SplineSurfaceInt.h>

Inheritance diagram for Go::SplineSurfaceInt:

List of all members.

Public Member Functions
	SplineSurfaceInt (boost::shared_ptr< ParamSurface > surf)
	Parameters: surf  the parametric curve defining the intersection object.
	SplineSurfaceInt (boost::shared_ptr< ParamSurface > surf, ParamGeomInt *parent)
	Constructor.
virtual	~SplineSurfaceInt ()
	Destructor.
virtual boost::shared_ptr< ParamSurfaceInt >	makeIntObject (boost::shared_ptr< ParamSurface > surf)
	Return an intersection object for the input surface, using this object as parent.
virtual boost::shared_ptr< ParamCurveInt >	makeIntCurve (boost::shared_ptr< ParamCurve > crv, ParamGeomInt *parent)
	Return an intersection object for the input curve, using parameter parent as parent.
virtual bool	hasInnerKnots (int pardir) const
	Return true if the object has any inner knots in the specified parameter direction.
virtual bool	hasCriticalValsOrKnots (int pardir) const
	Return true if the object has any critical parameter values or inner knots in the specified parameter direction.
virtual std::vector< double >	getInnerKnotVals (int pardir, bool sort=false) const
	Return the inner knot values in the specified direction.
virtual std::vector< double >	getCriticalValsAndKnots (int pardir) const
	Return the critical parameter values and inner knots for the object.
virtual int	getMeshSize (int dir)
	Return the size of the geometric sample mesh in the specified direction.
virtual double	paramFromMesh (int dir, int idx)
	Return the corresponding mesh parameter.
virtual std::vector< double >::iterator	getMesh ()
	Return the geometric sample mesh for the parametric function.
virtual DirectionCone	directionCone () const
	A cone which contains all normals of the object.
virtual DirectionCone	reducedDirectionCone (bool reduce_at_bd[4], double epsge) const
	Make exact direction cone. Only applicable for Bezier case.
virtual void	getBoundaryObjects (std::vector< boost::shared_ptr< BoundaryGeomInt > > &bd_objs)
	Return the boundary objects of this object.
virtual int	checkPeriodicity (int pardir) const
	Check if the object is periodic in the specified direction.
virtual bool	isSimple ()
	Estimates if the current surface is simple enough for a singularity iteration.
virtual bool	isSpline ()
	Verify whether the object is a spline.
virtual bool	isIsoParametric (ParamCurveInt *curve, int dir, double par, double ptol, double tol)
	Check if a curve is an iso parametric curve in the current surface.
virtual double	getOptimizedConeAngle (Point &axis1, Point &axis2)
	We try to treat problems which will never result in a simple case by shrinking the domain slightly, resulting in smaller cones.
virtual void	knotIntervalFuzzy (double &u, double &v, double utol, double vtol) const
	Find the knot intervals for which u and v lie inside, moving the value u or v if they lie close to a knot.
virtual double	nextSegmentVal (int dir, double par, bool forward, double tol) const
	Return the value of the knot next to the input parameter par.
virtual RotatedBox	getRotatedBox (std::vector< Point > &axis) const
	Create a box containing the geometric sample mesh in the input coordinate system.
virtual void	splitAtG0 (double angtol, std::vector< boost::shared_ptr< ParamSurfaceInt > > &subG1)
	Requests from selfintersection computation.
virtual boost::shared_ptr< ParamSurfaceInt >	getNormalSurface () const
	Returns the normal surface corresponding to this surface.
virtual bool	canImplicitize ()
	Check whether the objects fulfills the requirements to implicitize.
virtual bool	implicitize (double tol)
	Implicitize the object.
virtual bool	getImplicit (double tol, double &tol2, AlgObj3DInt &alg_obj_3d_int)
	Get the implicit representation of the object.
SplineCurve *	constParamCurve (double parameter, bool pardir_is_u) const
	Generate and return the specified isocurve.
boost::shared_ptr< SplineSurface >	getSplineSurface ()
	Return pointer to the spline surface defining this object.
virtual boost::shared_ptr< const SplineSurface >	splineSurface () const
	Return pointer to the spline surface defining this object.
void	setImplicitDeg ()
	Choose a degree for the implicit representation.
Protected Attributes
boost::shared_ptr< SplineSurface >	spsf_
boost::shared_ptr< SplineSurface >	normalsf_

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Detailed Description

This class represents the "intersection object" of a spline surface.

Definition at line 53 of file SplineSurfaceInt.h.

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Constructor & Destructor Documentation

Go::SplineSurfaceInt::SplineSurfaceInt	(	boost::shared_ptr< ParamSurface >	surf,
		ParamGeomInt *	parent
	)			[explicit]

Constructor.

Parameters:

	surf	the parametric curve defining the intersection object.
	parent	the parent object to this object.

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Member Function Documentation

virtual boost::shared_ptr<ParamSurfaceInt> Go::SplineSurfaceInt::makeIntObject

(

boost::shared_ptr< ParamSurface >

surf

)

[virtual]

Return an intersection object for the input surface, using this object as parent.

Parameters:

surf

the parametric surface defining the intersection object.

Reimplemented from Go::ParamSurfaceInt.

virtual boost::shared_ptr<ParamCurveInt> Go::SplineSurfaceInt::makeIntCurve	(	boost::shared_ptr< ParamCurve >	crv,
		ParamGeomInt *	parent
	)			[virtual]

Return an intersection object for the input curve, using parameter parent as parent.

Parameters:

	crv	the parametric curve defining the intersection object.
	parent	the parent to the created intersection object.

Reimplemented from Go::ParamSurfaceInt.

virtual bool Go::SplineSurfaceInt::hasInnerKnots

(

int

pardir

)

const [virtual]

Return true if the object has any inner knots in the specified parameter direction.

Parameters:

pardir

the parameter direction in question. Indexing starts at 0.

Reimplemented from Go::ParamSurfaceInt.

virtual bool Go::SplineSurfaceInt::hasCriticalValsOrKnots

(

int

pardir

)

const [virtual]

Return true if the object has any critical parameter values or inner knots in the specified parameter direction.

Parameters:

pardir

the parameter direction in question. Indexing starts at 0.

Reimplemented from Go::ParamSurfaceInt.

virtual std::vector<double> Go::SplineSurfaceInt::getInnerKnotVals	(	int	pardir,
		bool	sort = false
	)			const [virtual]

Return the inner knot values in the specified direction.

Parameters:

	pardir	the parameter direction in question. Indexing starts at 0.
	sort	the returned values may be sorted by the function.

Reimplemented from Go::ParamSurfaceInt.

virtual std::vector<double> Go::SplineSurfaceInt::getCriticalValsAndKnots

(

int

pardir

)

const [virtual]

Return the critical parameter values and inner knots for the object.

Parameters:

pardir

the parameter direction in question. Indexing starts at 0.

Reimplemented from Go::ParamSurfaceInt.

virtual int Go::SplineSurfaceInt::getMeshSize

(

int

dir

)

[virtual]

Return the size of the geometric sample mesh in the specified direction.

Parameters:

dir

the parameter direction in question. Indexing starts at 0.

Reimplemented from Go::ParamSurfaceInt.

virtual double Go::SplineSurfaceInt::paramFromMesh	(	int	dir,
		int	idx
	)			[virtual]

Return the corresponding mesh parameter.

Parameters:

	dir	the parameter direction in question. Indexing starts at 0.
	idx	the mesh idx in the specified direction. Indexing starts at 0.

Reimplemented from Go::ParamSurfaceInt.

virtual DirectionCone Go::SplineSurfaceInt::directionCone

(

)

const [virtual]

A cone which contains all normals of the object.

Returns:

A cone which contains all normals of the object.

Reimplemented from Go::ParamSurfaceInt.

virtual void Go::SplineSurfaceInt::getBoundaryObjects

(

std::vector< boost::shared_ptr< BoundaryGeomInt > > &

bd_objs

)

[virtual]

Return the boundary objects of this object.

Parameters:

bd_objs

the boundary objects of this object.

Reimplemented from Go::ParamSurfaceInt.

virtual int Go::SplineSurfaceInt::checkPeriodicity

(

int

pardir

)

const [virtual]

Check if the object is periodic in the specified direction.

Analyze periodicity of surface based on number of repeating knots and control points. The return value is -1 if the surface ends are disjoint, otherwise k if cv is C^k continuous. These are sufficient but not necessary conditions for periodicity, so it is possible that a higher degree of periodicity exists. Should not be called on this layer, should be overruled by inherited class.

Parameters:

pardir

the parameter direction in question.

Returns:

-1 if the curve ends are disjoint, or k if the surface is proven to be C^k continuous.

Reimplemented from Go::ParamSurfaceInt.

virtual bool Go::SplineSurfaceInt::isSimple

(

)

[virtual]

Estimates if the current surface is simple enough for a singularity iteration.

Checks the span of the normal cone and the size of the surface

Returns:

True if the surface is characterized as simple.

Reimplemented from Go::ParamSurfaceInt.

virtual bool Go::SplineSurfaceInt::isSpline

(

)

[virtual]

Verify whether the object is a spline.

Returns:

True if the object is a spline.

Reimplemented from Go::ParamSurfaceInt.

virtual bool Go::SplineSurfaceInt::isIsoParametric	(	ParamCurveInt *	curve,
		int	dir,
		double	par,
		double	ptol,
		double	tol
	)			[virtual]

Check if a curve is an iso parametric curve in the current surface.

NB! Only valid for splines

Reimplemented from Go::ParamSurfaceInt.

virtual double Go::SplineSurfaceInt::getOptimizedConeAngle	(	Point &	axis1,
		Point &	axis2
	)			[virtual]

We try to treat problems which will never result in a simple case by shrinking the domain slightly, resulting in smaller cones.

This is useful for scenarios where the normals are parallell in a boundary point.

Parameters:

	axis1	first vector defining a projection plane
	axis2	second vector defining a projection plane

Returns:

The optimized cone angle

Reimplemented from Go::ParamSurfaceInt.

virtual void Go::SplineSurfaceInt::knotIntervalFuzzy	(	double &	u,
		double &	v,
		double	utol,
		double	vtol
	)			const [virtual]

Find the knot intervals for which u and v lie inside, moving the value u or v if they lie close to a knot.

Parameters:

	u	the u parameter value
	v	the v parameter value
	utol	the parametric tolerance deciding if the input parameter u should be moved.
	vtol	the parametric tolerance deciding if the input parameter v should be moved.

Reimplemented from Go::ParamSurfaceInt.

virtual double Go::SplineSurfaceInt::nextSegmentVal	(	int	dir,
		double	par,
		bool	forward,
		double	tol
	)			const [virtual]

Return the value of the knot next to the input parameter par.

Parameters:

	dir	the parameter direction in question. Indexing starts at 0.
	par	the parameter value
	forward	if true we return the closest knot to the right, otherwise the closest knot to the left.
	tol	the tolerance to determine if par is already located on the start of the next segment.

Returns:

The knot closest to the input parameter.

Reimplemented from Go::ParamSurfaceInt.

virtual RotatedBox Go::SplineSurfaceInt::getRotatedBox

(

std::vector< Point > &

axis

)

const [virtual]

Create a box containing the geometric sample mesh in the input coordinate system.

Parameters:

axis

the axis defining the coordinate system. The size of vector axis is 2, the last point is given as the cross product axis[0]axis[1].

Returns:

The rotated box

Reimplemented from Go::ParamSurfaceInt.

virtual void Go::SplineSurfaceInt::splitAtG0	(	double	angtol,
		std::vector< boost::shared_ptr< ParamSurfaceInt > > &	subG1
	)			[virtual]

Requests from selfintersection computation.

Split at G1 discontinuities.

Parameters:

	angtol	angular tolerance defining G1 discontinuity
	subG1	vector of subdivided patches that are G1

Reimplemented from Go::ParamSurfaceInt.

virtual boost::shared_ptr<ParamSurfaceInt> Go::SplineSurfaceInt::getNormalSurface

(

)

const [virtual]

Returns the normal surface corresponding to this surface.

Returns:

Pointer to the SplineSurface defining the normal surface.

Reimplemented from Go::ParamSurfaceInt.

virtual bool Go::SplineSurfaceInt::canImplicitize

(

)

[virtual]

Check whether the objects fulfills the requirements to implicitize.

Returns:

Return true if we may implicitize the object.

Reimplemented from Go::ParamSurfaceInt.

virtual bool Go::SplineSurfaceInt::implicitize

(

double

tol

)

[virtual]

Implicitize the object.

Parameters:

tol

the geoemtric tolerance for the implicitization.

Returns:

True if the implicitization was a success.

Reimplemented from Go::ParamSurfaceInt.

virtual bool Go::SplineSurfaceInt::getImplicit	(	double	tol,
		double &	tol2,
		AlgObj3DInt &	alg_obj_3d_int
	)			[virtual]

Get the implicit representation of the object.

Garbage is returned if we are not able to implicitize.

Parameters:

	tol	geometric tolerance for the implicitization procedure.
	tol2	geometric estimate for the accuracy of the implicitized object. Not yet in use!!!
	alg_obj_3d_int	the algebraic object containing the implicitized surface.

Returns:

True if the implicitization was a success.

Reimplemented from Go::ParamSurfaceInt.

SplineCurve* Go::SplineSurfaceInt::constParamCurve	(	double	parameter,
		bool	pardir_is_u
	)			const

Generate and return the specified isocurve.

Parameters:

	parameter	value of the fixed parameter.
	pardir_is_u	'true' if the first parameter is the running parameter, 'false' otherwise.

Returns:

Pointer to the created isocurve.

boost::shared_ptr<SplineSurface> Go::SplineSurfaceInt::getSplineSurface

(

)

[inline]

Return pointer to the spline surface defining this object.

Returns:

The spline surface defining this object.

Definition at line 255 of file SplineSurfaceInt.h.

References spsf_.

virtual boost::shared_ptr<const SplineSurface> Go::SplineSurfaceInt::splineSurface

(

)

const [inline, virtual]

Return pointer to the spline surface defining this object.

Returns:

The spline surface defining this object.

Definition at line 260 of file SplineSurfaceInt.h.

References spsf_.

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

• SplineSurfaceInt.h

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