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SbDPLine Class Reference

The SbDPLine class represents a line using double precision coordinates. More...

`#include <Inventor/SbDPLine.h>`

## Public Member Functions | |

SbDPLine (void) | |

SbDPLine (const SbVec3d &p0, const SbVec3d &p1) | |

void | setValue (const SbVec3d &p0, const SbVec3d &p1) |

void | setPosDir (const SbVec3d &position, const SbVec3d &direction) |

SbBool | getClosestPoints (const SbDPLine &line2, SbVec3d &ptOnThis, SbVec3d &ptOnLine2) const |

SbVec3d | getClosestPoint (const SbVec3d &point) const |

const SbVec3d & | getPosition (void) const |

const SbVec3d & | getDirection (void) const |

void | print (FILE *file) const |

The SbDPLine class represents a line using double precision coordinates.

SbDPLine is used by many other classes in Coin. It provides a way of specifying a directed line (also known as a ray) through a specified point (origin) and a direction in 3D space. Note that the line is infinite in both directions from its definition point.

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

- See also
- SbVec3d

- Since
- Coin 2.0

SbDPLine::SbDPLine | ( | void | ) |

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

Constructor with *p0* specifying the line start point and *p1* the line end point. *p0* should not be the same as *p1*, as this will lead to having a null vector as the direction vector, which would cause division by zero problems in some of the other methods on this class.

Set new position and direction of the line by specifying line start point and end point. *p0* should not be the same as *p1*, as this will lead to having a null vector as the direction vector, which would cause division by zero problems in some of the other methods on this class.

Set position and direction.

Be aware that the direction vector will be normalized and not be the same as provided to this method.

- See also
- setValue, getOrigin, getDirection

- Since
- Coin 4.0

SbBool SbDPLine::getClosestPoints | ( | const SbDPLine & | line2, |

SbVec3d & | ptOnThis, |
||

SbVec3d & | 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`

.

- See also
- getClosestPoint().

Returns the point on the line which is closest to *point*.

- See also
- getClosestPoints().

const SbVec3d & SbDPLine::getPosition | ( | void | ) | const |

Return a vector representing a point on the line.

const SbVec3d & SbDPLine::getDirection | ( | void | ) | const |

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

void SbDPLine::print | ( | FILE * | fp | ) | const |

Dump the state of this object to the *fp* file stream. Only works in debug version of library, method does nothing in an optimized build.

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

- SbDPLine.h
- SbDPLine.cpp