SbVec4f(3)

NAME
SbVec4f - The SbVec4f class is a 4 dimensional vector with floating point coordinates.

This vector class is used by many other classes in Coin. It provides storage for a 3 dimensional homogeneoues vector (with the 4 components usually referred to as <x, y, z, w>) aswell as simple floating point arithmetic operations.

SYNOPSIS

#include <Inventor/SbLinear.h>

Inherited by SbColor4f.

  Public Member Functions
SbVec4f (void)
SbVec4f (const float v[4])
SbVec4f (float x, float y, float z, float w)
SbVec4f (const SbVec4d &v)
SbVec4f (const SbVec4b &v)
SbVec4f (const SbVec4s &v)
SbVec4f (const SbVec4i32 &v)
SbVec4f & setValue (const float v[4])
SbVec4f & setValue (float x, float y, float z, float w)
SbVec4f & setValue (const SbVec4d &v)
SbVec4f & setValue (const SbVec4b &v)
SbVec4f & setValue (const SbVec4s &v)
SbVec4f & setValue (const SbVec4i32 &v)
const float * getValue (void) const
void getValue (float &x, float &y, float &z, float &w) const
float & operator[] (int i)
const float & operator[] (int i) const
SbBool equals (const SbVec4f &v, float tolerance) const
float dot (const SbVec4f &v) const
void getReal (SbVec3f &v) const
float length (void) const
float sqrLength (void) const
void negate (void)
float normalize (void)
SbVec4f & operator*= (float d)
SbVec4f & operator/= (float d)
SbVec4f & operator+= (const SbVec4f &v)
SbVec4f & operator-= (const SbVec4f &v)
SbVec4f operator- (void) const
void print (FILE *fp) const

  Protected Attributes
float vec [4]

  Related Functions
(Note that these are not member functions.)
SbVec4f operator* (const SbVec4f &v, float d)
SbVec4f operator* (float d, const SbVec4f &v)
SbVec4f operator/ (const SbVec4f &v, float d)
SbVec4f operator+ (const SbVec4f &v1, const SbVec4f &v2)
SbVec4f operator- (const SbVec4f &v1, const SbVec4f &v2)
int operator== (const SbVec4f &v1, const SbVec4f &v2)
int operator!= (const SbVec4f &v1, const SbVec4f &v2)

Detailed Description

The SbVec4f class is a 4 dimensional vector with floating point coordinates.

This vector class is used by many other classes in Coin. It provides storage for a 3 dimensional homogeneoues vector (with the 4 components usually referred to as <x, y, z, w>) aswell as simple floating point arithmetic operations.

See also:
    SbVec2s, SbVec2f, SbVec2d, SbVec3s, SbVec3f, SbVec3d, SbVec4d.

Constructor & Destructor Documentation

  SbVec4f::SbVec4f (void) [inline]
The default constructor does nothing. The vector coordinates will be uninitialized until a call the setValue().

  SbVec4f::SbVec4f (const float v[4]) [inline]
Constructs an SbVec4f instance with initial values from v.

  SbVec4f::SbVec4f (float x, float y, float z, float w) [inline]
Constructs an SbVec4f instance with the initial homogeneous vector set to <x,y,z,w>.

  SbVec4f::SbVec4f (const SbVec4d & v) [inline], [explicit]
Constructs an SbVec4f instance from an SbVec4d instance.

  SbVec4f::SbVec4f (const SbVec4b & v) [inline], [explicit]
Constructs an SbVec4f instance from an SbVec4b instance.

Since:
    Coin 2.5

  SbVec4f::SbVec4f (const SbVec4s & v) [inline], [explicit]
Constructs an SbVec4f instance from an SbVec4s instance.

Since:
    Coin 2.5

  SbVec4f::SbVec4f (const SbVec4i32 & v) [inline], [explicit]
Constructs an SbVec4f instance from an SbVec4i32 instance.

Since:
    Coin 2.5

Member Function Documentation

  SbVec4f & SbVec4f::setValue (const float v[4]) [inline]
Set new coordinates for the vector from v. Returns reference to self.

See also:
    getValue().

  SbVec4f & SbVec4f::setValue (float x, float y, float z, float w) [inline]
Set new coordinates for the vector. Returns reference to self.

See also:
    getValue().

  SbVec4f & SbVec4f::setValue (const SbVec4d & v)
Sets the value from an SbVec4d instance.

  SbVec4f & SbVec4f::setValue (const SbVec4b & v)

Since:
    Coin 2.5

  SbVec4f & SbVec4f::setValue (const SbVec4s & v)

Since:
    Coin 2.5

  SbVec4f & SbVec4f::setValue (const SbVec4i32 & v)

Since:
    Coin 2.5

  const float * SbVec4f::getValue (void) const [inline]
Returns a pointer to an array of four floats containing the x, y, z and w coordinates of the vector.

See also:
    setValue().

  void SbVec4f::getValue (float & x, float & y, float & z, float & w) const [inline]
Returns the x, y, z and w coordinates of the vector.

See also:
    setValue().

  float & SbVec4f::operator[] (int i) [inline]
Index operator. Returns modifiable x, y, z or w component of vector.

See also:
    getValue() and setValue().

  const float & SbVec4f::operator[] (int i) const [inline]
Index operator. Returns x, y, z or w component of vector.

See also:
    getValue() and setValue().

  SbBool SbVec4f::equals (const SbVec4f & v, float tolerance) const
Compares the vector with v and returns TRUE if the distance between the vectors is smaller or equal to the square root of tolerance.

The comparison is done in 4D-space, i.e. the w component of the vector is not used to make x, y and z into Cartesian coordinates first.

  float SbVec4f::dot (const SbVec4f & v) const [inline]
Calculates and returns the result of taking the dot product of this vector and v.

  void SbVec4f::getReal (SbVec3f & v) const
Returns the vector as a Cartesian 3D vector in v. This means that the 3 first components x, y and z will be divided by the fourth, w.

  float SbVec4f::length (void) const
Return the length of the vector in 4D space.

  float SbVec4f::sqrLength (void) const [inline]
Return the square of the length of the vector in 4D space.

  void SbVec4f::negate (void) [inline]
Negate the vector.

  float SbVec4f::normalize (void)
Normalize the vector to unit length. Return value is the original length of the vector before normalization.

  SbVec4f & SbVec4f::operator*= (float d) [inline]
Multiply components of vector with value d. Returns reference to self.

  SbVec4f & SbVec4f::operator/= (float d) [inline]
Divides components of vector with value d. Returns reference to self.

  SbVec4f & SbVec4f::operator+= (const SbVec4f & v) [inline]
Adds this vector and vector v. Returns reference to self.

  SbVec4f & SbVec4f::operator-= (const SbVec4f & v) [inline]
Subtracts vector v from this vector. Returns reference to self.

  SbVec4f SbVec4f::operator- (void) const [inline]
Non-destructive negation operator. Returns a new SbVec4f instance which has all components negated.

See also:
    negate().

  void SbVec4f::print (FILE * fp) const
Dump the state of this object to the file stream. Only works in debug version of library, method does nothing in an optimized compile.

Friends And Related Function Documentation

  SbVec4f operator* (const SbVec4f & v, float d) [related]
Returns an SbVec4f instance which is the components of vector v multiplied with d.

  SbVec4f operator* (float d, const SbVec4f & v) [related]
Returns an SbVec4f instance which is the components of vector v multiplied with d.

  SbVec4f operator/ (const SbVec4f & v, float d) [related]
Returns an SbVec4f instance which is the components of vector v divided on the scalar factor d.

  SbVec4f operator+ (const SbVec4f & v1, const SbVec4f & v2) [related]
Returns an SbVec4f instance which is the sum of vectors v1 and v2.

  SbVec4f operator- (const SbVec4f & v1, const SbVec4f & v2) [related]
Returns an SbVec4f instance which is vector v2 subtracted from vector v1.

  int operator== (const SbVec4f & v1, const SbVec4f & v2) [related]
Returns 1 if v1 and v2 are equal, 0 otherwise.

See also:
    equals().

  int operator!= (const SbVec4f & v1, const SbVec4f & v2) [related]
Returns 1 if v1 and v2 are not equal, 0 if they are equal.

See also:
    equals().

Author

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