Directed line in 3D. More...
#include <Inventor/SbLine.h>
Public Member Functions | |
SbLine () | |
Default constructor. | |
SbLine (const SbVec3f &p0, const SbVec3f &p1) | |
Constructor. | |
void | setValue (const SbVec3f &p0, const SbVec3f &p1) |
Sets line to pass through points p0 and p1. | |
void | setPosDir (const SbVec3f &position, const SbVec3f &direction) |
Sets line using a position and a direction vector. | |
void | setValue (const SbLined &line) |
Sets line from a double precision line. | |
SbBool | getClosestPoints (const SbLine &line2, SbVec3f &ptOnThis, SbVec3f &ptOnLine2) const |
Finds the two closest points between this line and line2, and loads them into ptOnThis and ptOnLine2. | |
SbVec3f | getClosestPoint (const SbVec3f &point) const |
Returns the closest point on the line to the given point. | |
const SbVec3f & | getPosition () const |
Returns position of line origin point. | |
const SbVec3f & | getDirection () const |
Returns direction vector of line. | |
Static Public Member Functions | |
static void | setIntersectEpsilon (const float epsilon) |
Setup epsilon to detect intersection of very small geometry. | |
Directed line in 3D.
Represents a directed line in 3D. This is a basic Open Inventor datatype that is used for representing a 3D line. It is used as input and output by a variety of Open Inventor classes.
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Constructor.
The line is directed from p0 to p1.
To construct a line from a position and direction you can use: SbLine(p0, p0 + dir), but using the default constructor followed by the setPosDir() method is recommended to avoid floating point precision problems.
Returns the closest point on the line to the given point.
SbBool SbLine::getClosestPoints | ( | const SbLine & | line2, |
SbVec3f & | ptOnThis, | ||
SbVec3f & | ptOnLine2 | ||
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Finds the two closest points between this line and line2, and loads them into ptOnThis and ptOnLine2.
Returns FALSE if the lines are parallel (results undefined), and returns TRUE otherwise.
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Setup epsilon to detect intersection of very small geometry.
Sets line using a position and a direction vector.
The direction vector will be normalized automatically. This method is preferred over setValue when the point has very large magnitude, for example 1e6, because adding a normalized direction vector to such a point may not be significant.
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Sets line to pass through points p0 and p1.