NAME

       SbVec4f — 4D vector class

INHERITS FROM

       SbVec4f

SYNOPSIS

       #include <Inventor/SbLinear.h>

          Methods from class SbVec4f:

                         SbVec4f()
                         SbVec4f(const float v[4])
                         SbVec4f(float x, float y, float z, float w)
     float               dot(const SbVec4f &v) const
     SbBool              equals(const SbVec4f v, float tolerance) const
     void                getReal(SbVec3f &v) const
     const float *       getValue() const
     void                getValue(float &x, float &y, float &z, float &w) const
     float               length() const
     void                negate()
                         normalize()
     SbVec4f &           setValue(const float v[4])
     SbVec4f &           setValue(float x, float y, float z, float w)
     float &             operator [](int i)
     const float &       operator [](int i)
     SbVec4f &           operator *=(float d)
     SbVec4f &           operator /=(float d)
     SbVec4f &           operator +=(const SbVec4f &u)
     SbVec4f &           operator -=(const SbVec4f &u)
     SbVec4f             operator -() const
     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)

DESCRIPTION

       4D  vector class used to store homogeneous coordinates. This class is used in Inventor for
       arguments and return values.

METHODS

                         SbVec4f()
          Default constructor.

                         SbVec4f(const float v[4])
                         SbVec4f(float x, float y, float z, float w)
          Constructor given vector components.

     float               dot(const SbVec4f &v) const
          Returns dot (inner) product of vector and another vector.

     SbBool              equals(const SbVec4f v, float tolerance) const
          Equality comparison within given tolerance — the square of the length  of  the  maximum
          distance between the two vectors.

     void                getReal(SbVec3f &v) const
          Returns the real portion of the vector by dividing by the fourth value.

     const float *       getValue() const
     void                getValue(float &x, float &y, float &z, float &w) const
          Returns vector components.

     float               length() const
          Returns geometric length of vector.

     void                negate()
          Negates each component of vector in place.

                         normalize()
          Changes vector to be unit length.

     SbVec4f &           setValue(const float v[4])
     SbVec4f &           setValue(float x, float y, float z, float w)
          Sets the vector components.

     float &             operator [](int i)
     const float &       operator [](int i)
          Accesses indexed component of vector.

     SbVec4f &           operator *=(float d)
     SbVec4f &           operator /=(float d)
          Component-wise scalar multiplication and division operators.

     SbVec4f &           operator +=(const SbVec4f &u)
     SbVec4f &           operator -=(const SbVec4f &u)
          Component-wise vector addition and subtraction operators.

     SbVec4f             operator -() const
          Nondestructive unary negation — returns a new vector.

     SbVec4f             operator *(const SbVec4f &v, float d)
     SbVec4f             operator *(float d, const SbVec4f &v)
     SbVec4f             operator /(const SbVec4f &v, float d)
          Component-wise binary scalar multiplication and division operators.

     SbVec4f             operator +(const SbVec4f &v1, const SbVec4f &v2)
     SbVec4f             operator -(const SbVec4f &v1, const SbVec4f &v2)
          Component-wise binary vector addition and subtraction operators.

     int                 operator ==(const SbVec4f &v1, const SbVec4f &v2)
     int                 operator !=(const SbVec4f &v1, const SbVec4f &v2)
          Equality comparison operators.

SEE ALSO

       SbVec2f, SbVec3f, SbVec2s, SbRotation

                                                                                   SbVec4f(3IV)()