2D line between two points with intersection methods. More...

#include <C:/Projects/skylicht-engine/Projects/Irrlicht/Include/line2d.h>

Public Member Functions
	line2d ()
	Default constructor for line going from (0,0) to (1,1).
	line2d (T xa, T ya, T xb, T yb)
	Constructor for line between the two points.
	line2d (const vector2d< T > &start, const vector2d< T > &end)
	Constructor for line between the two points given as vectors.
	line2d (const line2d< T > &other)
	Copy constructor.
line2d< T >	operator+ (const vector2d< T > &point) const
line2d< T > &	operator+= (const vector2d< T > &point)
line2d< T >	operator- (const vector2d< T > &point) const
line2d< T > &	operator-= (const vector2d< T > &point)
bool	operator== (const line2d< T > &other) const
bool	operator!= (const line2d< T > &other) const
void	setLine (const T &xa, const T &ya, const T &xb, const T &yb)
	Set this line to new line going through the two points.
void	setLine (const vector2d< T > &nstart, const vector2d< T > &nend)
	Set this line to new line going through the two points.
void	setLine (const line2d< T > &line)
	Set this line to new line given as parameter.
T	getLength () const
	Get length of line.
T	getLengthSQ () const
	Get squared length of the line.
vector2d< T >	getMiddle () const
	Get middle of the line.
vector2d< T >	getVector () const
	Get the vector of the line.
bool	intersectWith (const line2d< T > &l, vector2d< T > &out, bool checkOnlySegments=true) const
	Tests if this line intersects with another line.
vector2d< T >	getUnitVector () const
	Get unit vector of the line.
f64	getAngleWith (const line2d< T > &l) const
	Get angle between this line and given line.
T	getPointOrientation (const vector2d< T > &point) const
	Tells us if the given point lies to the left, right, or on the line.
bool	isPointOnLine (const vector2d< T > &point) const
	Check if the given point is a member of the line.
bool	isPointBetweenStartAndEnd (const vector2d< T > &point) const
	Check if the given point is between start and end of the line.
vector2d< T >	getClosestPoint (const vector2d< T > &point, bool checkOnlySegments=true) const
	Get the closest point on this line to a point.
vector2df	getClosestPoint (const vector2df &point, bool checkOnlySegments) const

Public Attributes
vector2d< T >	start
	Start point of the line.
vector2d< T >	end
	End point of the line.

Detailed Description

template<class T>
class irr::core::line2d< T >

2D line between two points with intersection methods.

Member Function Documentation

◆ getAngleWith()

template<class T>

f64 irr::core::line2d< T >::getAngleWith ( const line2d< T > & l ) const

inline

Get angle between this line and given line.

Parameters

l	Other line for test.

Returns: Angle in degrees.

◆ getClosestPoint()

template<class T>

vector2d< T > irr::core::line2d< T >::getClosestPoint	(	const vector2d< T > &	point,
		bool	checkOnlySegments = true ) const

inline

Get the closest point on this line to a point.

Parameters

checkOnlySegments Default (true) is to return a point on the line-segment (between begin and end) of the line. When set to false the function will check for the first the closest point on the the line even when outside the segment.

◆ getLength()

template<class T>

T irr::core::line2d< T >::getLength ( ) const

inline

Get length of line.

Returns: Length of the line.

◆ getLengthSQ()

template<class T>

T irr::core::line2d< T >::getLengthSQ ( ) const

inline

Get squared length of the line.

Returns: Squared length of line.

◆ getMiddle()

template<class T>

vector2d< T > irr::core::line2d< T >::getMiddle ( ) const

inline

Get middle of the line.

Returns: center of the line.

◆ getPointOrientation()

template<class T>

T irr::core::line2d< T >::getPointOrientation ( const vector2d< T > & point ) const

inline

Tells us if the given point lies to the left, right, or on the line.

Returns: 0 if the point is on the line <0 if to the left, or >0 if to the right.

◆ getUnitVector()

template<class T>

vector2d< T > irr::core::line2d< T >::getUnitVector ( ) const

inline

Get unit vector of the line.

Returns: Unit vector of this line.

◆ getVector()

template<class T>

vector2d< T > irr::core::line2d< T >::getVector ( ) const

inline

Get the vector of the line.

Returns: The vector of the line.

◆ intersectWith()

template<class T>

bool irr::core::line2d< T >::intersectWith	(	const line2d< T > &	l,
		vector2d< T > &	out,
		bool	checkOnlySegments = true ) const

inline

Tests if this line intersects with another line.

Parameters

l	Other line to test intersection with.
checkOnlySegments	Default is to check intersection between the begin and endpoints. When set to false the function will check for the first intersection point when extending the lines.
out	If there is an intersection, the location of the intersection will be stored in this vector.

Returns: True if there is an intersection, false if not.

◆ isPointBetweenStartAndEnd()

template<class T>

bool irr::core::line2d< T >::isPointBetweenStartAndEnd ( const vector2d< T > & point ) const

inline

Check if the given point is between start and end of the line.

Assumes that the point is already somewhere on the line.

◆ isPointOnLine()

template<class T>

bool irr::core::line2d< T >::isPointOnLine ( const vector2d< T > & point ) const

inline

Check if the given point is a member of the line.

Returns: True if point is between start and end, else false.

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

C:/Projects/skylicht-engine/Projects/Irrlicht/Include/line2d.h

Public Member Functions

Public Attributes

Detailed Description

Member Function Documentation

◆ getAngleWith()

◆ getClosestPoint()

◆ getLength()

◆ getLengthSQ()

◆ getMiddle()

◆ getPointOrientation()

◆ getUnitVector()

◆ getVector()

◆ intersectWith()

◆ isPointBetweenStartAndEnd()

◆ isPointOnLine()