Public Member Functions | Public Attributes | List of all members
uicore::LineSegment2x< Type > Class Template Reference

2D line segment More...

#include <line_segment.h>

Public Member Functions

 LineSegment2x ()
 
 LineSegment2x (const LineSegment2x< Type > &copy)
 
 LineSegment2x (const Vec2< Type > &point_p, const Vec2< Type > &point_q)
 
LineSegment2x< Type > & clip (const Rectx< Type > &rect, bool &clipped)
 Clip this line to a rectangle. More...
 
bool collinear (const LineSegment2x< Type > &second) const
 Return true if two line segments are collinear. (All points are on the same line.) More...
 
Vec2< Type > intersection (const LineSegment2x< Type > &second, bool &intersect) const
 Return the intersection point of two lines. More...
 
bool intersects (const LineSegment2x< Type > &second, bool collinear_intersect) const
 Return true if two line segments intersect. More...
 
Vec2< Type > midpoint () const
 Get the midpoint of this line. More...
 
Vec2< Type > normal () const
 Return the normal vector of the line from point A to point B. More...
 
bool operator!= (const LineSegment2x< Type > &line) const
 != operator. More...
 
LineSegment2x< Type > & operator= (const LineSegment2x< Type > &copy)
 = operator. More...
 
bool operator== (const LineSegment2x< Type > &line) const
 == operator. More...
 
Type point_distance (const Vec2< Type > &point)
 Return the distance from a point to a line. More...
 
Type point_right_of_line (const Vec2< Type > &point) const
 Return [<0, 0, >0] if the Point P is right, on or left of the line trough A,B. More...
 

Public Attributes

Vec2< Type > p
 Start point on the line. More...
 
Vec2< Type > q
 

Detailed Description

template<typename Type>
class uicore::LineSegment2x< Type >

2D line segment

A line segment has a start point and an end point
These line templates are defined for: int (LineSegment2i), float (LineSegment2f), double (LineSegment2d)

Constructor & Destructor Documentation

template<typename Type>
uicore::LineSegment2x< Type >::LineSegment2x ( )
inline
template<typename Type>
uicore::LineSegment2x< Type >::LineSegment2x ( const LineSegment2x< Type > &  copy)
inline
template<typename Type>
uicore::LineSegment2x< Type >::LineSegment2x ( const Vec2< Type > &  point_p,
const Vec2< Type > &  point_q 
)
inline

Member Function Documentation

template<typename Type>
LineSegment2x<Type>& uicore::LineSegment2x< Type >::clip ( const Rectx< Type > &  rect,
bool &  clipped 
)

Clip this line to a rectangle.

If clipping was not successful, this object is undefined

Parameters
rect= Rectangle to clip to
clipped= On Return: true if the line could be clipped, false if line exists outside the rectangle
Returns
reference to this object
template<typename Type>
bool uicore::LineSegment2x< Type >::collinear ( const LineSegment2x< Type > &  second) const

Return true if two line segments are collinear. (All points are on the same line.)

Parameters
second= The second line to check with
Returns
true = They are collinear
template<typename Type>
Vec2<Type> uicore::LineSegment2x< Type >::intersection ( const LineSegment2x< Type > &  second,
bool &  intersect 
) const

Return the intersection point of two lines.

Parameters
second= Second line.
intersect= On Return: The intercept. If the lines are parallel, this contains this line's first point
Returns
true if the lines intersect, false if the lines are parallel
template<typename Type>
bool uicore::LineSegment2x< Type >::intersects ( const LineSegment2x< Type > &  second,
bool  collinear_intersect 
) const

Return true if two line segments intersect.

Parameters
second= Second line.
collinear_intersect= true if a collision is reported when all points are on the same line.
Returns
true = Intersects
template<typename Type>
Vec2<Type> uicore::LineSegment2x< Type >::midpoint ( ) const
inline

Get the midpoint of this line.

Returns
The midpoint
template<typename Type>
Vec2<Type> uicore::LineSegment2x< Type >::normal ( ) const

Return the normal vector of the line from point A to point B.

When using Vec2i, the vector is an 8 bit fraction (multiplied by 256)

Returns
The normal vector
template<typename Type>
bool uicore::LineSegment2x< Type >::operator!= ( const LineSegment2x< Type > &  line) const
inline

!= operator.

template<typename Type>
LineSegment2x<Type>& uicore::LineSegment2x< Type >::operator= ( const LineSegment2x< Type > &  copy)
inline

= operator.

template<typename Type>
bool uicore::LineSegment2x< Type >::operator== ( const LineSegment2x< Type > &  line) const
inline

== operator.

template<typename Type>
Type uicore::LineSegment2x< Type >::point_distance ( const Vec2< Type > &  point)

Return the distance from a point to a line.

Parameters
point= The point.
template<typename Type>
Type uicore::LineSegment2x< Type >::point_right_of_line ( const Vec2< Type > &  point) const
inline

Return [<0, 0, >0] if the Point P is right, on or left of the line trough A,B.

Parameters
point= The point
Returns
Value representing - left (>0), centre (=0), or right (<0)

Member Data Documentation

template<typename Type>
Vec2<Type> uicore::LineSegment2x< Type >::p

Start point on the line.

template<typename Type>
Vec2<Type> uicore::LineSegment2x< Type >::q
The documentation for this class was generated from the following file: