casacore::MVPosition Class Reference

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#include <MVPosition.h>

Public Member Functions
	MVPosition ()
	Default constructor generates a (0,0,0) position.
	MVPosition (const MVPosition &other)
	Copy constructor.
	MVPosition (Double in0, Double in1, Double in2)
	Creates a specified vector.
	MVPosition (Double in0)
	Creates a vector with specified length towards pole.
	MVPosition (const Quantity &l)
	MVPosition (const Quantity &l, Double angle0, Double angle1)
	Creates the position from specified (azimuth,elevation) angles and length.
	MVPosition (const Quantity &l, const Quantity &angle0, const Quantity &angle1)
	Creates the position from specified angles and length.
	MVPosition (const Quantum< Vector< Double > > &angle)
	If not enough angles: pole assumed (if none), or elevation =0 (if 1).
	MVPosition (const Quantity &l, const Quantum< Vector< Double > > &angle)
	MVPosition (const Vector< Double > &other)
	Create from specified length and/or angles and/or position.
	MVPosition (const Vector< Quantity > &other)
MVPosition &	operator= (const MVPosition &other)
	Copy assignment.
virtual	~MVPosition ()
	Destructor.
Double	operator* (const MVPosition &other) const
	Multiplication defined as in-product.
Bool	operator== (const MVPosition &other) const
	Equality comparisons.
Bool	operator!= (const MVPosition &other) const
Bool	near (const MVPosition &other, Double tol=1e-13) const
Bool	near (const MVPosition &other, Quantity tol) const
Bool	nearAbs (const MVPosition &other, Double tol=1e-13) const
MVPosition	operator- () const
	Addition and subtraction.
MVPosition &	operator+= (const MVPosition &right)
MVPosition	operator+ (const MVPosition &right) const
MVPosition &	operator-= (const MVPosition &right)
MVPosition	operator- (const MVPosition &right) const
MVPosition &	operator*= (const RotMatrix &right)
	Multiplication with rotation matrix (see also global functions).
MVPosition &	operator*= (Double right)
	Multiplication with constant.
Double &	operator() (uInt which)
	Obtain an element.
const Double &	operator() (uInt which) const
virtual void	adjust ()
	Normalise direction aspects by adjusting the length to 1.
virtual void	adjust (Double &res)
	Adjustment with returned factor.
virtual void	readjust (Double res)
	Re-adjust using factor given.
virtual Double	radius ()
	Get radius of position.
Vector< Double >	get () const
	Generate a 3-vector of coordinates (length(m), angles(rad)).
const Vector< Double > &	getValue () const
	Generate a 3-vector of x,y,z in m.
Quantum< Vector< Double > >	getAngle () const
	Generate angle 2-vector (in rad).
Quantum< Vector< Double > >	getAngle (const Unit &unit) const
	and with specified units
Double	getLong () const
	Get the longitudinal angle (in radians).
Quantity	getLong (const Unit &unit) const
	and with specified units
Double	getLat () const
	Get the latitude angle (rad).
Quantity	getLat (const Unit &unit) const
	and with specified units
Quantity	getLength () const
	Generate the length.
Quantity	getLength (const Unit &unit) const
	and generate it with the specified units
Double	positionAngle (const MVPosition &other) const
	Get the position angle between the directions.
Quantity	positionAngle (const MVPosition &other, const Unit &unit) const
Double	separation (const MVPosition &other) const
	Get the angular separation between two directions.
Quantity	separation (const MVPosition &other, const Unit &unit) const
MVPosition	crossProduct (const MVPosition &other) const
	Produce the cross product.
virtual void	print (ostream &os) const
	Print data.
virtual MeasValue *	clone () const
	Clone.
virtual Vector< Double >	getVector () const
	Get the value in internal units.
virtual void	putVector (const Vector< Double > &in)
	Set the value from internal units (set 0 for empty vector).
virtual Vector< Quantum< Double > >	getRecordValue () const
	Get the internal value as a Vector<Quantity>.
virtual Vector< Quantum< Double > >	getXRecordValue () const
virtual Vector< Quantum< Double > >	getTMRecordValue () const
virtual Bool	putValue (const Vector< Quantum< Double > > &in)
	Set the internal value if correct values and dimensions.
Public Member Functions inherited from casacore::MeasValue
void	dummy_constr () const
	Each derived class should have at least the following constructors:
virtual	~MeasValue ()
	Destructor.
void	dummy_operator () const
	The following operators should be present at least.

Static Public Member Functions
static void	assure (const MeasValue &in)
	Tell me your type.

Static Public Attributes
static const Double	loLimit
	Internal limts codes for negative height.
static const Double	hiLimit

Protected Member Functions
Double	getLat (Double ln) const
	Get the latitude assuming length is given.

Protected Attributes
Vector< Double >	xyz
	Position vector (in m).

Detailed Description

A 3D vector in space

Intended use:

Public interface

Review Status

Reviewed By:

tcornwel

Date Reviewed:

1996/02/22

Test programs:

tMeasMath

Prerequisite

• MeasValue
• Vector
• Quantum

Etymology

From Measure, Value and Position

Synopsis

A MVPosition is a 3-vector of positions in a rectangular frame with internal units of m.
It can be constructed with:

• MVPosition() creates point at origin (0,0,0)
• MVPosition(MVPosition) creates a copy
• MVPosition(Double, Double, Double) creates (x,y,z) with specified values
• MVPosition(Quantity length,Double, Double) creates a MVPosition assuming that the two values are (in radians) angle along 'equator' and towards 'pole'. A length of zero will be made 1um.
• MVPosition(Quantity length, Quantity, Quantity) creates a MVPosition assuming angles as in previous, or positions
• MVPosition(Quantity, Quantum<Vector<Double> >) creates a MVPosition from angle vector, using first two angles, and assuming second as zero if not present, and pole if length 0.
• MVPosition(Quantum<Vector<Double> > creates from angles or positions, depending on the units in the quantum vector. In the angle case, the data derived can be scaled with the readjust() function. If the unit of the quantum vector is length, position is assumed.
• MVPosition(Vector<Double> creates from angles (less than or equal to two elements) or x,y,z (3 elements).
• MVPosition(Vector<Quantity> creates from length+angles, angles, or x,y,z, depending on units.

A void adjust(Double) function normalises the vector to a length of 1; a get() returns as a Double 3-vector the length and angles of the position vector; a getAngle() returns a Quantum 2-vector, (uInt) returns the indicated element, and getValue returns the vector.
Positions can be added and subtracted.
The multiplication of two positions produces the in-product.

Example

See Mposition class.

Motivation

To do coordinate transformations

To Do

• See if not better to have a direction + length

Definition at line 111 of file MVPosition.h.

Constructor & Destructor Documentation

MVPosition() [1/11]

casacore::MVPosition::MVPosition

(

)

Default constructor generates a (0,0,0) position.

Referenced by crossProduct(), casacore::MVBaseline::MVBaseline(), casacore::MVBaseline::MVBaseline(), casacore::MVDirection::MVDirection(), casacore::MVEarthMagnetic::MVEarthMagnetic(), MVPosition(), casacore::MVuvw::MVuvw(), near(), near(), nearAbs(), operator!=(), operator*(), operator*=(), operator*=(), operator+(), operator+=(), operator-(), operator-(), operator-=(), operator=(), operator==(), casacore::MVDirection::positionAngle(), casacore::MVDirection::positionAngle(), positionAngle(), positionAngle(), casacore::MVDirection::separation(), casacore::MVDirection::separation(), separation(), and separation().

MVPosition() [2/11]

casacore::MVPosition::MVPosition

(

const MVPosition &

other

)

Copy constructor.

References MVPosition().

MVPosition() [3/11]

casacore::MVPosition::MVPosition	(	Double	in0,
		Double	in1,
		Double	in2 )

Creates a specified vector.

MVPosition() [4/11]

casacore::MVPosition::MVPosition ( Double in0 )

explicit

Creates a vector with specified length towards pole.

MVPosition() [5/11]

casacore::MVPosition::MVPosition

(

const Quantity &

l

)

MVPosition() [6/11]

casacore::MVPosition::MVPosition	(	const Quantity &	l,
		Double	angle0,
		Double	angle1 )

Creates the position from specified (azimuth,elevation) angles and length.

MVPosition() [7/11]

casacore::MVPosition::MVPosition	(	const Quantity &	l,
		const Quantity &	angle0,
		const Quantity &	angle1 )

Creates the position from specified angles and length.

or positions

Thrown Exceptions

• AipsError if quantities not in angle format

MVPosition() [8/11]

casacore::MVPosition::MVPosition

(

const Quantum< Vector< Double > > &

angle

)

If not enough angles: pole assumed (if none), or elevation =0 (if 1).

MVPosition() [9/11]

casacore::MVPosition::MVPosition	(	const Quantity &	l,
		const Quantum< Vector< Double > > &	angle )

MVPosition() [10/11]

casacore::MVPosition::MVPosition ( const Vector< Double > & other )

explicit

Create from specified length and/or angles and/or position.

MVPosition() [11/11]

casacore::MVPosition::MVPosition

(

const Vector< Quantity > &

other

)

~MVPosition()

virtual casacore::MVPosition::~MVPosition ( )

virtual

Destructor.

Member Function Documentation

adjust() [1/2]

virtual void casacore::MVPosition::adjust ( )

virtual

Normalise direction aspects by adjusting the length to 1.

For position no adjustment; for direction adjustment

Reimplemented from casacore::MeasValue.

Reimplemented in casacore::MVBaseline, casacore::MVDirection, casacore::MVEarthMagnetic, and casacore::MVuvw.

adjust() [2/2]

virtual void casacore::MVPosition::adjust ( Double & res )

virtual

Adjustment with returned factor.

Reimplemented from casacore::MeasValue.

Reimplemented in casacore::MVBaseline, casacore::MVDirection, casacore::MVEarthMagnetic, and casacore::MVuvw.

assure()

void casacore::MVPosition::assure ( const MeasValue & in )

static

Tell me your type.

clone()

virtual MeasValue * casacore::MVPosition::clone ( ) const

virtual

Clone.

Implements casacore::MeasValue.

Reimplemented in casacore::MVBaseline, casacore::MVDirection, casacore::MVEarthMagnetic, and casacore::MVuvw.

crossProduct()

MVPosition casacore::MVPosition::crossProduct

(

const MVPosition &

other

)

const

Produce the cross product.

References MVPosition().

get()

Vector< Double > casacore::MVPosition::get

(

)

const

Generate a 3-vector of coordinates (length(m), angles(rad)).

getAngle() [1/2]

Quantum< Vector< Double > > casacore::MVPosition::getAngle

(

)

const

Generate angle 2-vector (in rad).

getAngle() [2/2]

Quantum< Vector< Double > > casacore::MVPosition::getAngle

(

const Unit &

unit

)

const

and with specified units

getLat() [1/3]

Double casacore::MVPosition::getLat

(

)

const

Get the latitude angle (rad).

getLat() [2/3]

Quantity casacore::MVPosition::getLat

(

const Unit &

unit

)

const

and with specified units

getLat() [3/3]

Double casacore::MVPosition::getLat ( Double ln ) const

protected

Get the latitude assuming length is given.

getLength() [1/2]

Quantity casacore::MVPosition::getLength

(

)

const

Generate the length.

getLength() [2/2]

Quantity casacore::MVPosition::getLength

(

const Unit &

unit

)

const

and generate it with the specified units

getLong() [1/2]

Double casacore::MVPosition::getLong

(

)

const

Get the longitudinal angle (in radians).

getLong() [2/2]

Quantity casacore::MVPosition::getLong

(

const Unit &

unit

)

const

and with specified units

getRecordValue()

virtual Vector< Quantum< Double > > casacore::MVPosition::getRecordValue ( ) const

virtual

Get the internal value as a Vector<Quantity>.

Usable in records. The getXRecordValue() gets additional information for records. Note that the Vectors could be empty.

Implements casacore::MeasValue.

Reimplemented in casacore::MVBaseline, casacore::MVDirection, casacore::MVEarthMagnetic, and casacore::MVuvw.

getTMRecordValue()

virtual Vector< Quantum< Double > > casacore::MVPosition::getTMRecordValue ( ) const

inlinevirtual

Reimplemented from casacore::MeasValue.

Reimplemented in casacore::MVBaseline, casacore::MVDirection, and casacore::MVuvw.

Definition at line 267 of file MVPosition.h.

References getXRecordValue().

getValue()

const Vector< Double > & casacore::MVPosition::getValue

(

)

const

Generate a 3-vector of x,y,z in m.

getVector()

virtual Vector< Double > casacore::MVPosition::getVector ( ) const

virtual

Get the value in internal units.

Implements casacore::MeasValue.

Reimplemented in casacore::MVBaseline, casacore::MVEarthMagnetic, and casacore::MVuvw.

getXRecordValue()

virtual Vector< Quantum< Double > > casacore::MVPosition::getXRecordValue ( ) const

virtual

Reimplemented from casacore::MeasValue.

Reimplemented in casacore::MVBaseline, casacore::MVDirection, and casacore::MVuvw.

Referenced by getTMRecordValue().

near() [1/2]

Bool casacore::MVPosition::near	(	const MVPosition &	other,
		Double	tol = 1e-13 ) const

References MVPosition().

near() [2/2]

Bool casacore::MVPosition::near	(	const MVPosition &	other,
		Quantity	tol ) const

References MVPosition().

nearAbs()

Bool casacore::MVPosition::nearAbs	(	const MVPosition &	other,
		Double	tol = 1e-13 ) const

References MVPosition().

operator!=()

Bool casacore::MVPosition::operator!=

(

const MVPosition &

other

)

const

References MVPosition().

operator()() [1/2]

Double & casacore::MVPosition::operator()

(

uInt

which

)

Obtain an element.

operator()() [2/2]

const Double & casacore::MVPosition::operator()

(

uInt

which

)

const

operator*()

Double casacore::MVPosition::operator*

(

const MVPosition &

other

)

const

Multiplication defined as in-product.

References MVPosition().

operator*=() [1/2]

MVPosition & casacore::MVPosition::operator*=

(

const RotMatrix &

right

)

Multiplication with rotation matrix (see also global functions).

References MVPosition().

operator*=() [2/2]

MVPosition & casacore::MVPosition::operator*=

(

Double

right

)

Multiplication with constant.

References MVPosition().

operator+()

MVPosition casacore::MVPosition::operator+

(

const MVPosition &

right

)

const

References MVPosition().

operator+=()

MVPosition & casacore::MVPosition::operator+=

(

const MVPosition &

right

)

References MVPosition().

operator-() [1/2]

MVPosition casacore::MVPosition::operator-

(

)

const

Addition and subtraction.

References MVPosition().

operator-() [2/2]

MVPosition casacore::MVPosition::operator-

(

const MVPosition &

right

)

const

References MVPosition().

operator-=()

MVPosition & casacore::MVPosition::operator-=

(

const MVPosition &

right

)

References MVPosition().

operator=()

MVPosition & casacore::MVPosition::operator=

(

const MVPosition &

other

)

Copy assignment.

References MVPosition().

operator==()

Bool casacore::MVPosition::operator==

(

const MVPosition &

other

)

const

Equality comparisons.

References MVPosition().

positionAngle() [1/2]

Double casacore::MVPosition::positionAngle

(

const MVPosition &

other

)

const

Get the position angle between the directions.

I.e. the angle between the direction from one to the pole, and from one to the other.

References MVPosition().

positionAngle() [2/2]

Quantity casacore::MVPosition::positionAngle	(	const MVPosition &	other,
		const Unit &	unit ) const

References MVPosition().

print()

virtual void casacore::MVPosition::print ( ostream & os ) const

virtual

Print data.

Implements casacore::MeasValue.

Reimplemented in casacore::MVBaseline, casacore::MVEarthMagnetic, and casacore::MVuvw.

putValue()

virtual Bool casacore::MVPosition::putValue ( const Vector< Quantum< Double > > & in )

virtual

Set the internal value if correct values and dimensions.

Implements casacore::MeasValue.

Reimplemented in casacore::MVBaseline, casacore::MVDirection, casacore::MVEarthMagnetic, and casacore::MVuvw.

putVector()

virtual void casacore::MVPosition::putVector ( const Vector< Double > & in )

virtual

Set the value from internal units (set 0 for empty vector).

Implements casacore::MeasValue.

Reimplemented in casacore::MVBaseline, casacore::MVEarthMagnetic, and casacore::MVuvw.

radius()

virtual Double casacore::MVPosition::radius ( )

virtual

Get radius of position.

Reimplemented in casacore::MVBaseline, casacore::MVEarthMagnetic, and casacore::MVuvw.

readjust()

virtual void casacore::MVPosition::readjust ( Double res )

virtual

Re-adjust using factor given.

Reimplemented from casacore::MeasValue.

Reimplemented in casacore::MVBaseline, casacore::MVEarthMagnetic, and casacore::MVuvw.

separation() [1/2]

Double casacore::MVPosition::separation

(

const MVPosition &

other

)

const

Get the angular separation between two directions.

References MVPosition().

separation() [2/2]

Quantity casacore::MVPosition::separation	(	const MVPosition &	other,
		const Unit &	unit ) const

References MVPosition().

Member Data Documentation

hiLimit

const Double casacore::MVPosition::hiLimit

static

Definition at line 118 of file MVPosition.h.

loLimit

const Double casacore::MVPosition::loLimit

static

Internal limts codes for negative height.

Definition at line 117 of file MVPosition.h.

xyz

Vector<Double> casacore::MVPosition::xyz

protected

Position vector (in m).

Definition at line 279 of file MVPosition.h.

---

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

• casa/Quanta/MVPosition.h