Nektar::NekMeshUtils::CADCurve Class Reference

class for CAD curves. More...

#include <CADCurve.h>

Inheritance diagram for Nektar::NekMeshUtils::CADCurve:

Collaboration diagram for Nektar::NekMeshUtils::CADCurve:

Public Member Functions
	CADCurve (int i, TopoDS_Shape in)
	Default constructor. More...
	~CADCurve ()
Array< OneD, NekDouble >	Bounds ()
	Returns the minimum and maximum parametric coords t of the curve. More...
NekDouble	Length (NekDouble ti, NekDouble tf)
	Calculates the arclength between the two paremetric points ti and tf. ti must be less than tf. More...
Array< OneD, NekDouble >	P (NekDouble t)
	Gets the location (x,y,z) in an array out of the curve at point t. More...
Array< OneD, NekDouble >	D2 (NekDouble t)
	Gets the second derivatives at t. More...
NekDouble	tAtArcLength (NekDouble s)
	Calculates the parametric coordinate and arclength location defined by s. More...
Array< OneD, NekDouble >	GetMinMax ()
	Gets the start and end of the curve. More...
void	SetAdjSurf (std::vector< CADSurfSharedPtr > i)
	set the ids of the surfaces either side of the curve More...
std::vector< CADSurfSharedPtr >	GetAdjSurf ()
	returns the ids of neigbouring surfaces More...
NekDouble	GetTotLength ()
	returns lenght of the curve More...
void	SetVert (std::vector< CADVertSharedPtr > &falVert)
std::vector< CADVertSharedPtr >	GetVertex ()
	get the ids of the vertices that are the ends of the curve, which are in the main cad list More...
Public Member Functions inherited from Nektar::NekMeshUtils::CADObj
	CADObj ()
	Default constructor. More...
virtual	~CADObj ()
int	GetId ()
	Return ID of the vertex. More...
cadType	GetType ()

Private Attributes
BRepAdaptor_Curve	m_occCurve
	OpenCascade object of the curve. More...
TopoDS_Edge	m_occEdge
	OpenCascade edge. More...
NekDouble	m_length
	Length of edge. More...
std::vector< CADSurfSharedPtr >	m_adjSurfs
	List of surfaces which this curve belongs to. More...
std::vector< CADVertSharedPtr >	m_mainVerts
	list of end vertices More...

Friends
class	MemoryManager< CADCurve >

Additional Inherited Members
Protected Attributes inherited from Nektar::NekMeshUtils::CADObj
int	m_id
	ID of the vert. More...
cadType	m_type
	type of the cad object More...

Detailed Description

class for CAD curves.

This class wraps the OpenCascade BRepAdaptor_Curve class for use with Nektar++.

Definition at line 61 of file CADCurve.h.

Constructor & Destructor Documentation

Nektar::NekMeshUtils::CADCurve::CADCurve	(	int	i,
		TopoDS_Shape	in
	)

Default constructor.

Definition at line 45 of file CADCurve.cpp.

References Nektar::NekMeshUtils::curve.

{
    gp_Trsf transform;
    gp_Pnt ori(0.0, 0.0, 0.0);
    transform.SetScale(ori, 1.0 / 1000.0);
    TopLoc_Location mv(transform);
    in.Move(mv);

    m_occEdge  = TopoDS::Edge(in);
    m_occCurve = BRepAdaptor_Curve(m_occEdge);

    GProp_GProps System;
    BRepGProp::LinearProperties(m_occEdge, System);
    m_length = System.Mass();

    m_id   = i;
    m_type = curve;
}

Nektar::NekMeshUtils::CADCurve::~CADCurve ( )

inline

Definition at line 71 of file CADCurve.h.

{};

Member Function Documentation

Array< OneD, NekDouble > Nektar::NekMeshUtils::CADCurve::Bounds

(

)

Returns the minimum and maximum parametric coords t of the curve.

Returns

Array of two entries, min and max parametric coordinate.

Definition at line 130 of file CADCurve.cpp.

{
    Array<OneD, NekDouble> t(2);
    t[0] = m_occCurve.FirstParameter();
    t[1] = m_occCurve.LastParameter();

    return t;
}

Array< OneD, NekDouble > Nektar::NekMeshUtils::CADCurve::D2

(

NekDouble

t

)

Gets the second derivatives at t.

Definition at line 110 of file CADCurve.cpp.

{
    Array<OneD, NekDouble> out(9);
    gp_Pnt loc;
    gp_Vec d1, d2;
    m_occCurve.D2(t, loc, d1, d2);

    out[0] = loc.X();
    out[1] = loc.Y();
    out[2] = loc.Z();
    out[3] = d1.X();
    out[4] = d1.Y();
    out[5] = d1.Z();
    out[6] = d2.X();
    out[7] = d2.Y();
    out[8] = d2.Z();

    return out;
}

std::vector<CADSurfSharedPtr> Nektar::NekMeshUtils::CADCurve::GetAdjSurf ( )

inline

returns the ids of neigbouring surfaces

Definition at line 129 of file CADCurve.h.

References m_adjSurfs.

    {
        return m_adjSurfs;
    }

Array< OneD, NekDouble > Nektar::NekMeshUtils::CADCurve::GetMinMax

(

)

Gets the start and end of the curve.

Returns

Array with 6 entries of endpoints x1,y1,z1,x2,y2,z2.

Definition at line 139 of file CADCurve.cpp.

{
    Array<OneD, NekDouble> locs(6);

    gp_Pnt start =
        BRep_Tool::Pnt(TopExp::FirstVertex(m_occEdge, Standard_True));
    gp_Pnt end = BRep_Tool::Pnt(TopExp::LastVertex(m_occEdge, Standard_True));

    locs[0] = start.X();
    locs[1] = start.Y();
    locs[2] = start.Z();
    locs[3] = end.X();
    locs[4] = end.Y();
    locs[5] = end.Z();

    return locs;
}

NekDouble Nektar::NekMeshUtils::CADCurve::GetTotLength ( )

inline

returns lenght of the curve

Definition at line 135 of file CADCurve.h.

References m_length.

    {
        return m_length;
    }

std::vector<CADVertSharedPtr> Nektar::NekMeshUtils::CADCurve::GetVertex ( )

inline

get the ids of the vertices that are the ends of the curve, which are in the main cad list

Definition at line 150 of file CADCurve.h.

References m_mainVerts.

    {
        return m_mainVerts;
    }

NekDouble Nektar::NekMeshUtils::CADCurve::Length	(	NekDouble	ti,
		NekDouble	tf
	)

Calculates the arclength between the two paremetric points ti and tf. ti must be less than tf.

Parameters

ti	First parametric coordinate.
tf	Second parametric coordinate.

Returns

Arc length between ti and tf.

Definition at line 87 of file CADCurve.cpp.

{
    Array<OneD, NekDouble> b = Bounds();
    Handle(Geom_Curve) m_c = BRep_Tool::Curve(m_occEdge, b[0], b[1]);
    Handle(Geom_Curve) NewCurve = new Geom_TrimmedCurve(m_c, ti, tf);
    TopoDS_Edge NewEdge = BRepBuilderAPI_MakeEdge(NewCurve);
    GProp_GProps System;
    BRepGProp::LinearProperties(NewEdge, System);
    return System.Mass() / 1000.0;
}

Array< OneD, NekDouble > Nektar::NekMeshUtils::CADCurve::P

(

NekDouble

t

)

Gets the location (x,y,z) in an array out of the curve at point t.

Parameters

t	Parametric coordinate

Returns

Array of x,y,z

Definition at line 98 of file CADCurve.cpp.

{
    Array<OneD, NekDouble> location(3);
    gp_Pnt loc = m_occCurve.Value(t);

    location[0] = loc.X();
    location[1] = loc.Y();
    location[2] = loc.Z();

    return location;
}

void Nektar::NekMeshUtils::CADCurve::SetAdjSurf ( std::vector< CADSurfSharedPtr >  i )

inline

set the ids of the surfaces either side of the curve

Definition at line 123 of file CADCurve.h.

References m_adjSurfs.

    {
        m_adjSurfs = i;
    }

void Nektar::NekMeshUtils::CADCurve::SetVert ( std::vector< CADVertSharedPtr > &  falVert )

inline

Definition at line 143 of file CADCurve.h.

References m_mainVerts.

    {
        m_mainVerts = falVert;
    }

NekDouble Nektar::NekMeshUtils::CADCurve::tAtArcLength

(

NekDouble

s

)

Calculates the parametric coordinate and arclength location defined by s.

Parameters

s	Arclength location.

Returns

Calculated parametric coordinate.

Todo:

This really needs improving for accuracy.

Definition at line 64 of file CADCurve.cpp.

{
    NekDouble dt =
        (m_occCurve.LastParameter() - m_occCurve.FirstParameter()) / (5000);
    NekDouble t = m_occCurve.FirstParameter();

    NekDouble len = 0.0;

    while (len <= s)
    {
        gp_Pnt P1, P2;
        gp_Vec drdt1, drdt2;

        m_occCurve.D1(t, P1, drdt1);
        t += dt;
        m_occCurve.D1(t, P2, drdt2);

        len += (drdt1.Magnitude() + drdt2.Magnitude()) / 2.0 * dt;
    }

    return t - dt;
}

Friends And Related Function Documentation

friend class MemoryManager< CADCurve >

friend

Definition at line 64 of file CADCurve.h.

Member Data Documentation

std::vector<CADSurfSharedPtr> Nektar::NekMeshUtils::CADCurve::m_adjSurfs

private

List of surfaces which this curve belongs to.

Definition at line 163 of file CADCurve.h.

Referenced by GetAdjSurf(), and SetAdjSurf().

NekDouble Nektar::NekMeshUtils::CADCurve::m_length

private

Length of edge.

Definition at line 161 of file CADCurve.h.

Referenced by GetTotLength().

std::vector<CADVertSharedPtr> Nektar::NekMeshUtils::CADCurve::m_mainVerts

private

list of end vertices

Definition at line 165 of file CADCurve.h.

Referenced by GetVertex(), and SetVert().

BRepAdaptor_Curve Nektar::NekMeshUtils::CADCurve::m_occCurve

private

OpenCascade object of the curve.

Definition at line 157 of file CADCurve.h.

TopoDS_Edge Nektar::NekMeshUtils::CADCurve::m_occEdge

private

OpenCascade edge.

Definition at line 159 of file CADCurve.h.