The Nebula Device 3: Math::line Class Reference
From The Nebula Device 3
Math::line Class Reference
#include <line.h>
Detailed Description
A line in 3d space.(C) 2004 RadonLabs GmbH
Public Member Functions | |
| line () | |
| default constructor | |
| line (const point &startPoint, const point &endPoint) | |
| component constructor | |
| line (const line &rhs) | |
| copy constructor | |
| void | set (const point &startPoint, const point &endPoint) |
| set start and end point | |
| const point & | start () const |
| get start point | |
| point | end () const |
| get end point | |
| const vector & | vec () const |
| get vector | |
| scalar | length () const |
| get length | |
| scalar | lengthsq () const |
| get squared length | |
| scalar | distance (const point &p) const |
| minimal distance of point to line | |
| bool | intersect (const line &l, point &pa, point &pb) const |
| intersect with line | |
| scalar | closestpoint (const point &p) const |
| return t of the closest point on the line | |
| point | pointat (scalar t) const |
| return p = b + m*t | |
Member Function Documentation
intersect with line
Get line/line intersection. Returns the shortest line between two lines.
- Todo:
- : Untested! Replace with simpler code.
| scalar Math::line::closestpoint | ( | const point & | p | ) | const [inline] |
return t of the closest point on the line
Returns a point on the line which is closest to a another point in space. This just returns the parameter t on where the point is located. If t is between 0 and 1, the point is on the line, otherwise not. To get the actual 3d point p:
p = m + b*t
| point Math::line::pointat | ( | scalar | t | ) | const [inline] |
return p = b + m*t
Returns p = b + m * t, given t. Note that the point is not on the line if 0.0 > t > 1.0