Triangle Class Reference

Class representing a Triangle. More...

#include <Triangle.h>

Collaboration diagram for Triangle:

Public Types
typedef Vec3(Triangle::*	VectorFieldFunction) () const
typedef double(Triangle::*	ScalarFieldFunction) () const

Public Member Functions
	Triangle (int, int, int, const Vec3 &, const Vec3 &, const Vec3 &, int, int)
double	sep (const Vec3 &) const
pair< bool, double >	dist (const Vec3 &) const
Vec3	getBoundingBoxMin () const
Vec3	getBoundingBoxMax () const
Vec3	getNormal () const
Vec3	toGlobal (const Vec3 &)
Vec3	toLocal (const Vec3 &)
bool	containsEdge (const Vec3 &, const Vec3 &) const
void	moveNode (int, const Vec3 &)
void	move (const Vec3 &)
int	getID () const
int	getTag () const
void	applyForce (const Vec3 &f)
void	zeroForce ()
pair< int, Vec3 >	getP0 () const
pair< int, Vec3 >	getP1 () const
pair< int, Vec3 >	getP2 () const
Vec3	getForce () const
double	getPressure () const

Static Public Member Functions
static VectorFieldFunction	getVectorFieldFunction (const string &)
static ScalarFieldFunction	getScalarFieldFunction (const string &)

Private Member Functions
double	EdgeSep (const Vec3 &, const Vec3 &, const Vec3 &) const

Private Attributes
Matrix3	m_invtrans
Matrix3	m_trans
Vec3	m_p0
Vec3	m_p1
Vec3	m_p2
Vec3	m_normal
Vec3	m_force
int	m_id0
int	m_id1
int	m_id2
int	m_tri_id
int	m_tag

Friends
ostream &	operator<< (ostream &, const Triangle &)
	output for debugging purposes More...

Detailed Description

Class representing a Triangle.

Author

Steffen Abe $Revision$ $$Date$

Member Typedef Documentation

ScalarFieldFunction

typedef double(Triangle::* Triangle::ScalarFieldFunction) () const

VectorFieldFunction

typedef Vec3(Triangle::* Triangle::VectorFieldFunction) () const

Constructor & Destructor Documentation

Triangle()

Triangle::Triangle	(	int	id0,
		int	id1,
		int	id2,
		const Vec3 &	v0,
		const Vec3 &	v1,
		const Vec3 &	v2,
		int	tri_id,
		int	tag
	)

Construct triangle from the corner coordinates. It is assumed that the corners are given anticlockwise and the normal is calculated accordingly.

Parameters

id0	id of the first corner
id1	id of the 2nd corner
id2	id of the 3rd corner
v0	first corner
v1	second corner
v2	third corner
tri_id	triangle id
tag	triangle tag

References cross(), Matrix3::inv(), m_force, m_id0, m_id1, m_id2, m_invtrans, m_normal, m_p0, m_p1, m_p2, m_tag, m_trans, m_tri_id, and Vec3::unit_s().

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Member Function Documentation

applyForce()

void Triangle::applyForce ( const Vec3 &  f )

inline

References m_force.

Referenced by Edge::applyForce(), BTriangleInteraction::calcForces(), and ETriangleInteraction::calcForces().

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containsEdge()

bool Triangle::containsEdge	(	const Vec3 &	p1,
		const Vec3 &	p2
	)		const

check if an edge given by 2 points is in the triangle

Parameters

p1
p2

References m_p0, m_p1, and m_p2.

dist()

pair< bool, double > Triangle::dist

(

const Vec3 &

p

)

const

Get the signed distance between a point and the triangle. If the closest point on the supporting plane is outside the triangle, the first component of the return value is "false", otherwise "true"

Parameters

p

the point

References m_invtrans, m_normal, m_p0, Vec3::X(), and Vec3::Y().

Referenced by ETriangleInteraction::calcForces(), and Edge::isValidContact().

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EdgeSep()

double Triangle::EdgeSep ( const Vec3 &  p0, const Vec3 &  p1, const Vec3 &  p  ) const

private

calculate distance between an edge and a point

Parameters

p0	point 1 of the edge
p1	point 2 of the edge
p	the point

References Vec3::norm(), sep(), and Vec3::unit().

Referenced by sep().

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getBoundingBoxMax()

Vec3 Triangle::getBoundingBoxMax

(

)

const

Get max. corner of axis-aligned bounding box of the triangle.

References cmax(), m_p0, m_p1, and m_p2.

Referenced by NeighborTable< T >::getParticlesNearTriangle().

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getBoundingBoxMin()

Vec3 Triangle::getBoundingBoxMin

(

)

const

Get min. corner of axis-aligned bounding box of the triangle.

References cmin(), m_p0, m_p1, and m_p2.

Referenced by NeighborTable< T >::getParticlesNearTriangle().

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getForce()

Vec3 Triangle::getForce ( ) const

inline

References m_force.

Referenced by TSubLattice< T >::getTriMeshForce(), and getVectorFieldFunction().

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getID()

int Triangle::getID ( ) const

inline

References m_tri_id.

Referenced by BTriangleInteraction::BTriangleInteraction().

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getNormal()

Vec3 Triangle::getNormal ( ) const

inline

References m_normal.

Referenced by ETriangleInteraction::calcForces().

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getP0()

pair<int,Vec3> Triangle::getP0 ( ) const

inline

References m_id0, and m_p0.

getP1()

pair<int,Vec3> Triangle::getP1 ( ) const

inline

References m_id1, m_p0, and m_p1.

getP2()

pair<int,Vec3> Triangle::getP2 ( ) const

inline

References m_id2, m_p0, and m_p2.

getPressure()

double Triangle::getPressure

(

)

const

Get pressure on the triangle from interaction forces

References m_force, m_normal, m_p1, and m_p2.

Referenced by getScalarFieldFunction().

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getScalarFieldFunction()

Triangle::ScalarFieldFunction Triangle::getScalarFieldFunction ( const string &  name )

static

Get the triangle member function which returns a scalar field of a given name. Returns NULL if a field with that name doesn't exist.

Parameters

name	the name of the field

References getPressure(), and NULL.

Referenced by TSubLattice< T >::addScalarTriangleField().

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getTag()

int Triangle::getTag ( ) const

inline

References m_tag.

getVectorFieldFunction()

Triangle::VectorFieldFunction Triangle::getVectorFieldFunction ( const string &  name )

static

Get the triangle member function which returns a vector field of a given name. Returns NULL if a field with that name doesn't exist.

Parameters

name	the name of the field

References getForce(), and NULL.

Referenced by TSubLattice< T >::addVectorTriangleField().

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move()

void Triangle::move

(

const Vec3 &

d

)

Move (translate) whole triangle.

Parameters

d	the amount of movement

References m_p0.

moveNode()

void Triangle::moveNode	(	int	id,
		const Vec3 &	d
	)

Move one of the corners. The identifier for the corner is the global node id. If the node with the id is not in the triangle, do nothing.

Parameters

id	the global id of the node to be moved
d	the amount of movement

References cross(), Matrix3::inv(), m_id0, m_id1, m_id2, m_invtrans, m_normal, m_p0, m_p1, m_p2, m_trans, and Vec3::unit_s().

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sep()

double Triangle::sep

(

const Vec3 &

p

)

const

Get distance between point and the triangle.

Parameters

p

the point

References EdgeSep(), m_invtrans, m_normal, m_p0, m_p1, m_p2, Vec3::X(), and Vec3::Y().

Referenced by EdgeSep(), and NeighborTable< T >::getParticlesNearTriangle().

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toGlobal()

Vec3 Triangle::toGlobal

(

const Vec3 &

p

)

Transform a point in local coordinates into global coordiantes. The local coordinate systems is formed by (P1-P0,P2-P0,N).

Parameters

p	the point to be transformed

References m_p0, and m_trans.

Referenced by BTriangleInteraction::calcForces(), and BTriangleInteraction::getAP().

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toLocal()

Vec3 Triangle::toLocal

(

const Vec3 &

p

)

Transform a point in global coordinates into local coordiantes. The local coordinate systems is formed by (P1-P0,P2-P0,N).

Parameters

p	the point to be transformed

References m_invtrans, and m_p0.

Referenced by BTriangleInteraction::BTriangleInteraction().

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zeroForce()

void Triangle::zeroForce ( )

inline

References m_force.

Friends And Related Function Documentation

operator<<

ostream& operator<< ( ostream &  ost, const Triangle &  T  )

friend

output for debugging purposes

output Triangle to ostream

Member Data Documentation

m_force

Vec3 Triangle::m_force

private

Referenced by applyForce(), getForce(), getPressure(), Triangle(), and zeroForce().

m_id0

int Triangle::m_id0

private

Referenced by getP0(), moveNode(), and Triangle().

m_id1

int Triangle::m_id1

private

Referenced by getP1(), moveNode(), and Triangle().

m_id2

int Triangle::m_id2

private

Referenced by getP2(), moveNode(), and Triangle().

m_invtrans

Matrix3 Triangle::m_invtrans

private

Referenced by dist(), moveNode(), sep(), toLocal(), and Triangle().

m_normal

Vec3 Triangle::m_normal

private

Referenced by dist(), getNormal(), getPressure(), moveNode(), operator<<(), sep(), and Triangle().

m_p0

Vec3 Triangle::m_p0

private

Referenced by containsEdge(), dist(), getBoundingBoxMax(), getBoundingBoxMin(), getP0(), getP1(), getP2(), move(), moveNode(), operator<<(), sep(), toGlobal(), toLocal(), and Triangle().

m_p1

Vec3 Triangle::m_p1

private

Referenced by containsEdge(), getBoundingBoxMax(), getBoundingBoxMin(), getP1(), getPressure(), moveNode(), operator<<(), sep(), and Triangle().

m_p2

Vec3 Triangle::m_p2

private

Referenced by containsEdge(), getBoundingBoxMax(), getBoundingBoxMin(), getP2(), getPressure(), moveNode(), operator<<(), sep(), and Triangle().

m_tag

int Triangle::m_tag

private

Referenced by getTag(), and Triangle().

m_trans

Matrix3 Triangle::m_trans

private

Referenced by moveNode(), toGlobal(), and Triangle().

m_tri_id

int Triangle::m_tri_id

private

Referenced by getID(), and Triangle().

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

• Geometry/Triangle.h
• Geometry/Triangle.cpp