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NAME

       SbPlane -

       The SbPlane class represents a plane in 3D space.

       SbDPPlane is used by many other classes in Coin. It provides a way of representing a
       plane, specified by a plane normal vector and a distance from the origin of the coordinate
       system.

SYNOPSIS

       #include <Inventor/SbLinear.h>

   Public Member Functions
       SbPlane (void)
       SbPlane (const SbVec3f &normal, const float D)
       SbPlane (const SbVec3f &p0, const SbVec3f &p1, const SbVec3f &p2)
       SbPlane (const SbVec3f &normal, const SbVec3f &point)
       void offset (const float d)
       SbBool intersect (const SbLine &l, SbVec3f &intersection) const
       void transform (const SbMatrix &matrix)
       SbBool isInHalfSpace (const SbVec3f &point) const
       float getDistance (const SbVec3f &point) const
       const SbVec3f & getNormal (void) const
       float getDistanceFromOrigin (void) const
       void print (FILE *file) const
       SbBool intersect (const SbPlane &pl, SbLine &line) const

   Friends
       int operator== (const SbPlane &p1, const SbPlane &p2)
       int operator!= (const SbPlane &p1, const SbPlane &p2)

Detailed Description

       The SbPlane class represents a plane in 3D space.

       SbDPPlane is used by many other classes in Coin. It provides a way of representing a
       plane, specified by a plane normal vector and a distance from the origin of the coordinate
       system.

       The SbPlane class represents a plane in 3D space.

       SbPlane is used by many other classes in Coin. It provides a way of representing a plane,
       specified by a plane normal vector and a distance from the origin of the coordinate
       system.

       Be aware that this class is an extension for Coin, and it is not available in the original
       SGI Open Inventor v2.1 API.

       Since:
           Coin 2.0

Constructor & Destructor Documentation

   SbPlane::SbPlane (void) An SbPlane instantiated with the default constructor will be
       uninitialized.
   SbPlane::SbPlane (const SbVec3f &normalref, const floatD) Construct an SbPlane instance with a
       normal pointing in the given direction and the given shortest distance from the origin of
       the coordinate system to a point in the plane.
       normal must not be a null vector.

   SbPlane::SbPlane (const SbVec3f &p0, const SbVec3f &p1, const SbVec3f &p2) Construct an
       SbPlane with three points laying in the plane. Make sure p0, p1 and p2 are actually three
       distinct points, not on a line, when using this constructor.
   SbPlane::SbPlane (const SbVec3f &normalref, const SbVec3f &point) Construct an SbPlane from a
       normal and a point laying in the plane.
       normal must not be a null vector.

Member Function Documentation

   void SbPlane::offset (const floatd) Add the given offset d to the plane distance from the
       origin.
   SbBool SbPlane::intersect (const SbLine &l, SbVec3f &intersection) const Find the point on
       given line l intersecting the plane and return it in intersection. If the line is parallel
       to the plane, we return FALSE, otherwise TRUE.
       Do not pass an invalid line for the l parameter (i.e. with a null direction vector).

   void SbPlane::transform (const SbMatrix &matrix) Transform the plane by matrix.
       See also:
           offset()

   SbBool SbPlane::isInHalfSpace (const SbVec3f &point) const Check if the given point lies in
       the halfspace of the plane which the plane normal vector is pointing.
   float SbPlane::getDistance (const SbVec3f &point) const Return the distance from point to
       plane. Positive distance means the point is in the plane's half space.
       This method is an extension specific to Coin versus the original SGI Inventor API.

   const SbVec3f & SbPlane::getNormal (void) const Return the plane's normal vector, which
       indicates which direction the plane is oriented.
       See also:
           getDistanceFromOrigin().

   float SbPlane::getDistanceFromOrigin (void) const Return distance from origin of coordinate
       system to the point in the plane which is closest to the origin.
       See also:
           getNormal().

   void SbPlane::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 build.
   SbBool SbPlane::intersect (const SbPlane &pl, SbLine &line) const Intersect this plane with
       pl, and return the resulting line in line. Returns TRUE if an intersection line can be
       found, and FALSE if the planes are parallel.
       Please note that the resulting SbLine must be considered as a line intersecting the
       SbLine's origin, extending infinitely in both directions.

       This function is an extension for Coin, and it is not available in the original SGI Open
       Inventor v2.1 API.

       Since:
           Coin 2.0

Friends And Related Function Documentation

   int operator== (const SbPlane &p1, const SbPlane &p2) [friend] Check the two given planes for
       equality.
   int operator!= (const SbPlane &p1, const SbPlane &p2) [friend] Check the two given planes for
       unequality.

Author

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