ON_4fPoint Class Reference

#include <opennurbs_fpoint.h>

Inheritance diagram for ON_4fPoint:

Public Member Functions
	ON_4fPoint ()=default
	x,y,z,w not initialized More...
	ON_4fPoint (const double *)
	from double[4] array More...
	ON_4fPoint (const float *)
	Require explicit construction when dev must insure array has length >= 4. More...
	ON_4fPoint (const ON_2dPoint &)
	Require explicit construction when losing precision. More...
	ON_4fPoint (const ON_2dVector &)
	from 2d vector More...
	ON_4fPoint (const ON_2fPoint &)
	from 2f point More...
	ON_4fPoint (const ON_2fVector &)
	from 2f vector More...
	ON_4fPoint (const ON_3dPoint &)
	from 3d point More...
	ON_4fPoint (const ON_3dVector &)
	from 3d vector More...
	ON_4fPoint (const ON_3fPoint &)
	from 3f point More...
	ON_4fPoint (const ON_3fVector &)
	from 3f vector More...
	ON_4fPoint (const ON_4dPoint &)
	from 4d point More...
	ON_4fPoint (const ON_4fPoint &)=default
	ON_4fPoint (float x, float y, float z, float w)
	~ON_4fPoint ()=default
ON__UINT32	DataCRC (ON__UINT32 current_remainder) const
float	EuclideanX () const
float	EuclideanY () const
float	EuclideanZ () const
bool	IsUnset () const
bool	IsValid () const
double	MaximumCoordinate () const
	absolute value of maximum coordinate More...
int	MaximumCoordinateIndex () const
bool	Normalize ()
	set so x^2 + y^2 + z^2 + w^2 = 1 More...
	operator const float * () const
	operator float * ()
	(float*) conversion operators More...
bool	operator!= (const ON_4fPoint &rhs) const
ON_4fPoint	operator* (float) const
ON_4fPoint &	operator*= (float)
ON_4fPoint	operator+ (const ON_4fPoint &) const
	sum w = sqrt(w1*w2) More...
ON_4fPoint &	operator+= (const ON_4fPoint &)
ON_4fPoint	operator- (const ON_4fPoint &) const
	difference w = sqrt(w1*w2) More...
ON_4fPoint &	operator-= (const ON_4fPoint &)
ON_4fPoint	operator/ (float) const
ON_4fPoint &	operator/= (float)
ON_4fPoint &	operator= (const double *)
	point = double[4] support More...
ON_4fPoint &	operator= (const float *)
	point = float[4] support More...
ON_4fPoint &	operator= (const ON_2dPoint &)
ON_4fPoint &	operator= (const ON_2dVector &)
ON_4fPoint &	operator= (const ON_2fPoint &)
	use implicit operator=(const ON_4fPoint&) More...
ON_4fPoint &	operator= (const ON_2fVector &)
ON_4fPoint &	operator= (const ON_3dPoint &)
ON_4fPoint &	operator= (const ON_3dVector &)
ON_4fPoint &	operator= (const ON_3fPoint &)
ON_4fPoint &	operator= (const ON_3fVector &)
ON_4fPoint &	operator= (const ON_4dPoint &)
ON_4fPoint &	operator= (const ON_4fPoint &)=default
bool	operator== (const ON_4fPoint &rhs) const
float &	operator[] (int)
	index operators mimic float[4] behavior More...
float	operator[] (int) const
float &	operator[] (unsigned int)
float	operator[] (unsigned int) const
void	Set (float, float, float, float)
	set 4d point value More...
void	Transform (const ON_Xform &)

Static Public Member Functions
static int	DictionaryCompare (const ON_4fPoint &lhs, const ON_4fPoint &rhs)
static int	ProjectiveCompare (const ON_4fPoint &lhs, const ON_4fPoint &rhs)

Public Attributes
float	w
float	x
float	y
float	z

Static Public Attributes
static const ON_4fPoint	Nan
	(ON_FLT_QNAN,ON_FLT_QNAN,ON_FLT_QNAN,ON_FLT_QNAN) More...
static const ON_4fPoint	Zero
	(0,0,0,0) More...

Detailed Description

ON_4fPoint (homogeneous coordinates)

Constructor & Destructor Documentation

ON_4fPoint() [1/14]

ON_4fPoint::ON_4fPoint ( )

default

x,y,z,w not initialized

~ON_4fPoint()

ON_4fPoint::~ON_4fPoint ( )

default

ON_4fPoint() [2/14]

ON_4fPoint::ON_4fPoint ( const ON_4fPoint &  )

default

ON_4fPoint() [3/14]

ON_4fPoint::ON_4fPoint ( float  x, float  y, float  z, float  w  )

explicit

ON_4fPoint() [4/14]

ON_4fPoint::ON_4fPoint

(

const ON_2fPoint &

)

from 2f point

ON_4fPoint() [5/14]

ON_4fPoint::ON_4fPoint

(

const ON_3fPoint &

)

from 3f point

ON_4fPoint() [6/14]

ON_4fPoint::ON_4fPoint

(

const ON_2fVector &

)

from 2f vector

ON_4fPoint() [7/14]

ON_4fPoint::ON_4fPoint

(

const ON_3fVector &

)

from 3f vector

ON_4fPoint() [8/14]

ON_4fPoint::ON_4fPoint ( const float *  )

explicit

Require explicit construction when dev must insure array has length >= 4.

from float[4] array

ON_4fPoint() [9/14]

ON_4fPoint::ON_4fPoint ( const ON_2dPoint &  )

explicit

Require explicit construction when losing precision.

from 2d point

ON_4fPoint() [10/14]

ON_4fPoint::ON_4fPoint ( const ON_3dPoint &  )

explicit

from 3d point

ON_4fPoint() [11/14]

ON_4fPoint::ON_4fPoint ( const ON_4dPoint &  )

explicit

from 4d point

ON_4fPoint() [12/14]

ON_4fPoint::ON_4fPoint ( const ON_2dVector &  )

explicit

from 2d vector

ON_4fPoint() [13/14]

ON_4fPoint::ON_4fPoint ( const ON_3dVector &  )

explicit

from 3d vector

ON_4fPoint() [14/14]

ON_4fPoint::ON_4fPoint ( const double *  )

explicit

from double[4] array

Member Function Documentation

DataCRC()

ON__UINT32 ON_4fPoint::DataCRC

(

ON__UINT32

current_remainder

)

const

DictionaryCompare()

static int ON_4fPoint::DictionaryCompare ( const ON_4fPoint &  lhs, const ON_4fPoint &  rhs  )

static

Description: A well ordered dictionary compare function that is nan aware and can be used for robust sorting.

EuclideanX()

float ON_4fPoint::EuclideanX

(

)

const

Returns: ON_UNSET_VALUE, if x or w is ON_UNSET_VALUE or ON_UNSET_POSITIVE_VALUE and neither x nor w is a nan. x/w, otherwise Remarks: If w is 0.0 or nan, the result will be a nan.

EuclideanY()

float ON_4fPoint::EuclideanY

(

)

const

Returns: ON_UNSET_VALUE, if y or w is ON_UNSET_VALUE or ON_UNSET_POSITIVE_VALUE and neither y nor w is a nan. y/w, otherwise Remarks: If w is 0.0 or nan, the result will be a nan.

EuclideanZ()

float ON_4fPoint::EuclideanZ

(

)

const

Returns: ON_UNSET_VALUE, if z or w is ON_UNSET_VALUE or ON_UNSET_POSITIVE_VALUE and neither z nor w is a nan. z/w, otherwise Remarks: If w is 0.0 or nan, the result will be a nan.

IsUnset()

bool ON_4fPoint::IsUnset

(

)

const

Returns: True if any coordinate is ON_UNSET_FLOAT or ON_UNSET_POSITIVE_FLOAT

IsValid()

bool ON_4fPoint::IsValid

(

)

const

Returns: False if any coordinate is ON_UNSET_FLOAT, ON_UNSET_POSITIVE_FLOAT, nan, or infinite. True, otherwise.

MaximumCoordinate()

double ON_4fPoint::MaximumCoordinate

(

)

const

absolute value of maximum coordinate

MaximumCoordinateIndex()

int ON_4fPoint::MaximumCoordinateIndex

(

)

const

Normalize()

bool ON_4fPoint::Normalize

(

)

set so x^2 + y^2 + z^2 + w^2 = 1

operator const float *()

ON_4fPoint::operator const float *

(

)

const

operator float *()

ON_4fPoint::operator float *

(

)

(float*) conversion operators

operator!=()

bool ON_4fPoint::operator!=

(

const ON_4fPoint &

rhs

)

const

Returns: True if lhs.* != rhs.* for some coordinate and no values are nans.

operator*()

ON_4fPoint ON_4fPoint::operator*

(

float

)

const

operator*=()

ON_4fPoint& ON_4fPoint::operator*=

(

float

)

operator+()

ON_4fPoint ON_4fPoint::operator+

(

const ON_4fPoint &

)

const

sum w = sqrt(w1*w2)

operator+=()

ON_4fPoint& ON_4fPoint::operator+=

(

const ON_4fPoint &

)

operator-()

ON_4fPoint ON_4fPoint::operator-

(

const ON_4fPoint &

)

const

difference w = sqrt(w1*w2)

operator-=()

ON_4fPoint& ON_4fPoint::operator-=

(

const ON_4fPoint &

)

operator/()

ON_4fPoint ON_4fPoint::operator/

(

float

)

const

operator/=()

ON_4fPoint& ON_4fPoint::operator/=

(

float

)

operator=() [1/12]

ON_4fPoint& ON_4fPoint::operator=

(

const double *

)

point = double[4] support

operator=() [2/12]

ON_4fPoint& ON_4fPoint::operator=

(

const float *

)

point = float[4] support

operator=() [3/12]

ON_4fPoint& ON_4fPoint::operator=

(

const ON_2dPoint &

)

operator=() [4/12]

ON_4fPoint& ON_4fPoint::operator=

(

const ON_2dVector &

)

operator=() [5/12]

ON_4fPoint& ON_4fPoint::operator=

(

const ON_2fPoint &

)

use implicit operator=(const ON_4fPoint&)

operator=() [6/12]

ON_4fPoint& ON_4fPoint::operator=

(

const ON_2fVector &

)

operator=() [7/12]

ON_4fPoint& ON_4fPoint::operator=

(

const ON_3dPoint &

)

operator=() [8/12]

ON_4fPoint& ON_4fPoint::operator=

(

const ON_3dVector &

)

operator=() [9/12]

ON_4fPoint& ON_4fPoint::operator=

(

const ON_3fPoint &

)

operator=() [10/12]

ON_4fPoint& ON_4fPoint::operator=

(

const ON_3fVector &

)

operator=() [11/12]

ON_4fPoint& ON_4fPoint::operator=

(

const ON_4dPoint &

)

operator=() [12/12]

ON_4fPoint& ON_4fPoint::operator= ( const ON_4fPoint &  )

default

operator==()

bool ON_4fPoint::operator==

(

const ON_4fPoint &

rhs

)

const

Returns: True if (lhs.x == rhs.x && lhs.y == rhs.y && lhs.z == rhs.z && lhs.w == rhs.w).

operator[]() [1/4]

float& ON_4fPoint::operator[]

(

int

)

index operators mimic float[4] behavior

operator[]() [2/4]

float ON_4fPoint::operator[]

(

int

)

const

operator[]() [3/4]

float& ON_4fPoint::operator[]

(

unsigned int

)

operator[]() [4/4]

float ON_4fPoint::operator[]

(

unsigned int

)

const

ProjectiveCompare()

static int ON_4fPoint::ProjectiveCompare ( const ON_4fPoint &  lhs, const ON_4fPoint &  rhs  )

static

Description: A well ordered projective compare function that is nan aware and can be used for robust sorting. Remarks: float c = non-nan value. ON_4fPoint h0 = ...; ON_4fPoint h1(c*h0.x,c*h0.x,c*h0.x,c*h0.x); 0 == ON_4fPoint::ProjectiveCompare(h0,ha);

Set()

void ON_4fPoint::Set	(	float	,
		float	,
		float	,
		float
	)

set 4d point value

Transform()

void ON_4fPoint::Transform

(

const ON_Xform &

)

These transform the point in place. The transformation matrix acts on the left of the point; i.e., result = transformation*point

Member Data Documentation

Nan

const ON_4fPoint ON_4fPoint::Nan

static

(ON_FLT_QNAN,ON_FLT_QNAN,ON_FLT_QNAN,ON_FLT_QNAN)

w

float ON_4fPoint::w

x

float ON_4fPoint::x

y

float ON_4fPoint::y

z

float ON_4fPoint::z

Zero

const ON_4fPoint ON_4fPoint::Zero

static

(0,0,0,0)