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osg::Quat Class Reference

A quaternion class. More...

Public Types

enum  { num_components = 4 }
 Number of vector components. More...
 
typedef double value_type
 Data type of vector components. More...
 

Public Member Functions

 Quat ()
 
 Quat (value_type x, value_type y, value_type z, value_type w)
 
 Quat (const Quat &rhs)
 
 Quat (const Vec4f &v)
 
 Quat (const Vec4d &v)
 
 Quat (value_type angle, const Vec3f &axis)
 
 Quat (value_type angle, const Vec3d &axis)
 
 Quat (value_type angle1, const Vec3f &axis1, value_type angle2, const Vec3f &axis2, value_type angle3, const Vec3f &axis3)
 
 Quat (value_type angle1, const Vec3d &axis1, value_type angle2, const Vec3d &axis2, value_type angle3, const Vec3d &axis3)
 
Quatoperator= (const Quat &v)
 
bool operator== (const Quat &v) const
 
bool operator!= (const Quat &v) const
 
bool operator< (const Quat &v) const
 
Vec4d asVec4 () const
 
Vec3d asVec3 () const
 
void set (value_type x, value_type y, value_type z, value_type w)
 
void set (const osg::Vec4f &v)
 
void set (const osg::Vec4d &v)
 
void set (const Matrixf &matrix)
 
void set (const Matrixd &matrix)
 
void get (Matrixf &matrix) const
 
void get (Matrixd &matrix) const
 
value_typeoperator[] (int i)
 
value_type operator[] (int i) const
 
value_typex ()
 
value_typey ()
 
value_typez ()
 
value_typew ()
 
value_type x () const
 
value_type y () const
 
value_type z () const
 
value_type w () const
 
bool zeroRotation () const
 return true if the Quat represents a zero rotation, and therefore can be ignored in computations. More...
 
const Quat operator* (value_type rhs) const
 Multiply by scalar. More...
 
Quatoperator*= (value_type rhs)
 Unary multiply by scalar. More...
 
const Quat operator* (const Quat &rhs) const
 Binary multiply. More...
 
Quatoperator*= (const Quat &rhs)
 Unary multiply. More...
 
Quat operator/ (value_type rhs) const
 Divide by scalar. More...
 
Quatoperator/= (value_type rhs)
 Unary divide by scalar. More...
 
const Quat operator/ (const Quat &denom) const
 Binary divide. More...
 
Quatoperator/= (const Quat &denom)
 Unary divide. More...
 
const Quat operator+ (const Quat &rhs) const
 Binary addition. More...
 
Quatoperator+= (const Quat &rhs)
 Unary addition. More...
 
const Quat operator- (const Quat &rhs) const
 Binary subtraction. More...
 
Quatoperator-= (const Quat &rhs)
 Unary subtraction. More...
 
const Quat operator- () const
 Negation operator - returns the negative of the quaternion. More...
 
value_type length () const
 Length of the quaternion = sqrt( vec . vec ) More...
 
value_type length2 () const
 Length of the quaternion = vec . vec. More...
 
Quat conj () const
 Conjugate. More...
 
const Quat inverse () const
 Multiplicative inverse method: q^(-1) = q^*/(q.q^*) More...
 
void makeRotate (value_type angle, value_type x, value_type y, value_type z)
 
void makeRotate (value_type angle, const Vec3f &vec)
 
void makeRotate (value_type angle, const Vec3d &vec)
 
void makeRotate (value_type angle1, const Vec3f &axis1, value_type angle2, const Vec3f &axis2, value_type angle3, const Vec3f &axis3)
 
void makeRotate (value_type angle1, const Vec3d &axis1, value_type angle2, const Vec3d &axis2, value_type angle3, const Vec3d &axis3)
 
void makeRotate (const Vec3f &vec1, const Vec3f &vec2)
 Make a rotation Quat which will rotate vec1 to vec2. More...
 
void makeRotate (const Vec3d &vec1, const Vec3d &vec2)
 Make a rotation Quat which will rotate vec1 to vec2. More...
 
void makeRotate_original (const Vec3d &vec1, const Vec3d &vec2)
 
void getRotate (value_type &angle, value_type &x, value_type &y, value_type &z) const
 Return the angle and vector components represented by the quaternion. More...
 
void getRotate (value_type &angle, Vec3f &vec) const
 Return the angle and vector represented by the quaternion. More...
 
void getRotate (value_type &angle, Vec3d &vec) const
 Return the angle and vector represented by the quaternion. More...
 
void slerp (value_type t, const Quat &from, const Quat &to)
 Spherical Linear Interpolation. More...
 
Vec3f operator* (const Vec3f &v) const
 Rotate a vector by this quaternion. More...
 
Vec3d operator* (const Vec3d &v) const
 Rotate a vector by this quaternion. More...
 

Public Attributes

value_type _v [4]
 

Detailed Description

A quaternion class.

It can be used to represent an orientation in 3D space.

Member Typedef Documentation

◆ value_type

typedef double osg::Quat::value_type

Data type of vector components.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum

Number of vector components.

Enumerator
num_components 

Constructor & Destructor Documentation

◆ Quat() [1/9]

osg::Quat::Quat ( )
inline

◆ Quat() [2/9]

osg::Quat::Quat ( value_type  x,
value_type  y,
value_type  z,
value_type  w 
)
inline

◆ Quat() [3/9]

osg::Quat::Quat ( const Quat rhs)
inline

References _v.

◆ Quat() [4/9]

osg::Quat::Quat ( const Vec4f v)
inline

◆ Quat() [5/9]

osg::Quat::Quat ( const Vec4d v)
inline

◆ Quat() [6/9]

osg::Quat::Quat ( value_type  angle,
const Vec3f axis 
)
inline

◆ Quat() [7/9]

osg::Quat::Quat ( value_type  angle,
const Vec3d axis 
)
inline

◆ Quat() [8/9]

osg::Quat::Quat ( value_type  angle1,
const Vec3f axis1,
value_type  angle2,
const Vec3f axis2,
value_type  angle3,
const Vec3f axis3 
)
inline

◆ Quat() [9/9]

osg::Quat::Quat ( value_type  angle1,
const Vec3d axis1,
value_type  angle2,
const Vec3d axis2,
value_type  angle3,
const Vec3d axis3 
)
inline

Member Function Documentation

◆ asVec3()

Vec3d osg::Quat::asVec3 ( ) const
inline

◆ asVec4()

Vec4d osg::Quat::asVec4 ( ) const
inline

◆ conj()

Quat osg::Quat::conj ( ) const
inline

Conjugate.

◆ get() [1/2]

void osg::Quat::get ( Matrixf matrix) const

◆ get() [2/2]

void osg::Quat::get ( Matrixd matrix) const

◆ getRotate() [1/3]

void osg::Quat::getRotate ( value_type angle,
value_type x,
value_type y,
value_type z 
) const

Return the angle and vector components represented by the quaternion.

◆ getRotate() [2/3]

void osg::Quat::getRotate ( value_type angle,
Vec3f vec 
) const

Return the angle and vector represented by the quaternion.

◆ getRotate() [3/3]

void osg::Quat::getRotate ( value_type angle,
Vec3d vec 
) const

Return the angle and vector represented by the quaternion.

◆ inverse()

const Quat osg::Quat::inverse ( ) const
inline

Multiplicative inverse method: q^(-1) = q^*/(q.q^*)

Referenced by operator/(), and operator/=().

◆ length()

value_type osg::Quat::length ( ) const
inline

Length of the quaternion = sqrt( vec . vec )

◆ length2()

value_type osg::Quat::length2 ( ) const
inline

Length of the quaternion = vec . vec.

Referenced by osgAnimation::TemplateTarget< osg::Vec4f >::lerp().

◆ makeRotate() [1/7]

void osg::Quat::makeRotate ( value_type  angle,
value_type  x,
value_type  y,
value_type  z 
)

◆ makeRotate() [2/7]

void osg::Quat::makeRotate ( value_type  angle,
const Vec3f vec 
)

◆ makeRotate() [3/7]

void osg::Quat::makeRotate ( value_type  angle,
const Vec3d vec 
)

◆ makeRotate() [4/7]

void osg::Quat::makeRotate ( value_type  angle1,
const Vec3f axis1,
value_type  angle2,
const Vec3f axis2,
value_type  angle3,
const Vec3f axis3 
)

◆ makeRotate() [5/7]

void osg::Quat::makeRotate ( value_type  angle1,
const Vec3d axis1,
value_type  angle2,
const Vec3d axis2,
value_type  angle3,
const Vec3d axis3 
)

◆ makeRotate() [6/7]

void osg::Quat::makeRotate ( const Vec3f vec1,
const Vec3f vec2 
)

Make a rotation Quat which will rotate vec1 to vec2.

Generally take a dot product to get the angle between these and then use a cross product to get the rotation axis Watch out for the two special cases when the vectors are co-incident or opposite in direction.

◆ makeRotate() [7/7]

void osg::Quat::makeRotate ( const Vec3d vec1,
const Vec3d vec2 
)

Make a rotation Quat which will rotate vec1 to vec2.

Generally take a dot product to get the angle between these and then use a cross product to get the rotation axis Watch out for the two special cases of when the vectors are co-incident or opposite in direction.

◆ makeRotate_original()

void osg::Quat::makeRotate_original ( const Vec3d vec1,
const Vec3d vec2 
)

◆ operator!=()

bool osg::Quat::operator!= ( const Quat v) const
inline

References _v.

◆ operator*() [1/4]

const Quat osg::Quat::operator* ( value_type  rhs) const
inline

Multiply by scalar.

◆ operator*() [2/4]

const Quat osg::Quat::operator* ( const Quat rhs) const
inline

Binary multiply.

References _v.

◆ operator*() [3/4]

Vec3f osg::Quat::operator* ( const Vec3f v) const
inline

Rotate a vector by this quaternion.

◆ operator*() [4/4]

Vec3d osg::Quat::operator* ( const Vec3d v) const
inline

Rotate a vector by this quaternion.

◆ operator*=() [1/2]

Quat& osg::Quat::operator*= ( value_type  rhs)
inline

Unary multiply by scalar.

◆ operator*=() [2/2]

Quat& osg::Quat::operator*= ( const Quat rhs)
inline

Unary multiply.

References _v.

◆ operator+()

const Quat osg::Quat::operator+ ( const Quat rhs) const
inline

Binary addition.

References _v.

◆ operator+=()

Quat& osg::Quat::operator+= ( const Quat rhs)
inline

Unary addition.

References _v.

◆ operator-() [1/2]

const Quat osg::Quat::operator- ( const Quat rhs) const
inline

Binary subtraction.

References _v.

◆ operator-() [2/2]

const Quat osg::Quat::operator- ( ) const
inline

Negation operator - returns the negative of the quaternion.

Basically just calls operator - () on the Vec4

◆ operator-=()

Quat& osg::Quat::operator-= ( const Quat rhs)
inline

Unary subtraction.

References _v.

◆ operator/() [1/2]

Quat osg::Quat::operator/ ( value_type  rhs) const
inline

Divide by scalar.

◆ operator/() [2/2]

const Quat osg::Quat::operator/ ( const Quat denom) const
inline

Binary divide.

References inverse().

◆ operator/=() [1/2]

Quat& osg::Quat::operator/= ( value_type  rhs)
inline

Unary divide by scalar.

◆ operator/=() [2/2]

Quat& osg::Quat::operator/= ( const Quat denom)
inline

Unary divide.

References inverse().

◆ operator<()

bool osg::Quat::operator< ( const Quat v) const
inline

References _v.

◆ operator=()

Quat& osg::Quat::operator= ( const Quat v)
inline

References _v.

◆ operator==()

bool osg::Quat::operator== ( const Quat v) const
inline

References _v.

◆ operator[]() [1/2]

value_type& osg::Quat::operator[] ( int  i)
inline

◆ operator[]() [2/2]

value_type osg::Quat::operator[] ( int  i) const
inline

◆ set() [1/5]

void osg::Quat::set ( value_type  x,
value_type  y,
value_type  z,
value_type  w 
)
inline

◆ set() [2/5]

void osg::Quat::set ( const osg::Vec4f v)
inline

◆ set() [3/5]

void osg::Quat::set ( const osg::Vec4d v)
inline

◆ set() [4/5]

void osg::Quat::set ( const Matrixf matrix)

◆ set() [5/5]

void osg::Quat::set ( const Matrixd matrix)

◆ slerp()

void osg::Quat::slerp ( value_type  t,
const Quat from,
const Quat to 
)

Spherical Linear Interpolation.

As t goes from 0 to 1, the Quat object goes from "from" to "to".

◆ w() [1/2]

value_type& osg::Quat::w ( )
inline

◆ w() [2/2]

value_type osg::Quat::w ( ) const
inline

◆ x() [1/2]

value_type& osg::Quat::x ( )
inline

◆ x() [2/2]

value_type osg::Quat::x ( ) const
inline

◆ y() [1/2]

value_type& osg::Quat::y ( )
inline

◆ y() [2/2]

value_type osg::Quat::y ( ) const
inline

◆ z() [1/2]

value_type& osg::Quat::z ( )
inline

◆ z() [2/2]

value_type osg::Quat::z ( ) const
inline

◆ zeroRotation()

bool osg::Quat::zeroRotation ( ) const
inline

return true if the Quat represents a zero rotation, and therefore can be ignored in computations.

Referenced by osg::Matrixd::postMultRotate(), osg::Matrixf::postMultRotate(), osg::Matrixd::preMultRotate(), and osg::Matrixf::preMultRotate().

Member Data Documentation

◆ _v

value_type osg::Quat::_v[4]

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