Public Member Functions¶

SbLine (void)
SbLine (const SbVec3f &origin, const SbVec3f &point)
void setValue (const SbVec3f &origin, const SbVec3f &point)
SbBool getClosestPoints (const SbLine &line2, SbVec3f &ptOnThis, SbVec3f &ptOnLine2) const
SbVec3f getClosestPoint (const SbVec3f &point) const
const SbVec3f & getPosition (void) const
const SbVec3f & getDirection (void) const
void print (FILE *file) const

SbLine::SbLine (void)¶

The default constructor does nothing. The line will be uninitialized until the first assignment or setValue() call.

SbLine::SbLine (const SbVec3f & origin, const SbVec3f & point)¶

Constructor with origin specifying the line origin point, and point specifying another point on the line that is used to determine the line's direction. point should not be the same as origin, as this will lead to the line having a null vector as the direction vector. This will cause division by zero problems in some of the other methods on this class.

Be aware that the direction vector will be normalized and not be the same as point - origin.

See also

void SbLine::setValue (const SbVec3f & origin, const SbVec3f & point)¶

Set new position and direction of the line by specifying line origin and another point on the line that is used to determine the line's direction. point should not be the same as origin, as this will lead to having a null vector as the direction vector. This will cause division by zero problems in some of the other methods on this class.

Be aware that the direction vector will be normalized and not be the same as point - origin.

See also

SbBool SbLine::getClosestPoints (const SbLine & line2, SbVec3f & ptOnThis, SbVec3f & ptOnLine2) const¶

Returns the two closest points on the lines. If the lines are parallel, all points are equally close and we return FALSE. If the lines are not parallel, the point positions will be stored in ptOnThis and ptOnLine2, and we'll return TRUE.

Note that both SbLine instances are considered to be infinite in both directions from their definition points, as far as this function is concerned.

See also

SbVec3f SbLine::getClosestPoint (const SbVec3f & point) const¶

Returns the point on the line which is closest to point:

                    _


             Q      D


    SP x-----x------->


        \    |


         \   |


          \  |


           \ |


            \|


             x P


 P = argument point            _


 SP = line starting point, and D = line direction of this line


 Q = point to find and return from function.fi

The vector defined by point and the returned point will be normal to the line.

Note that the SbLine instance is considered to be infinite in both directions from its definition point, as far as this function is concerned.

See also

getClosestPoints(). 

const SbVec3f & SbLine::getPosition (void) const¶

Return a vector representing the origin point on the line.

See also

const SbVec3f & SbLine::getDirection (void) const¶

Return a vector representing the direction of the line. The direction vector will always be normalized.

void SbLine::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.