jpp::core::rect< T > Class Template Reference

Rectangle template. More...

#include <jimcpp/core/engine/rect.hpp>

Public Member Functions
	rect ()
	Default constructor creating empty rectangle at (0,0)
	rect (T x, T y, T x2, T y2)
	Constructor with two corners.
	rect (const position2d< T > &upperLeft, const position2d< T > &lowerRight)
	Constructor with two corners.
template<class U >
	rect (const position2d< T > &pos, const dimension2d< U > &size)
	Constructor with upper left corner and dimension.
template<class U >
	rect (const dimension2d< U > &size)
	Constructor with upper left at 0,0 and lower right using dimension.
rect< T >	operator+ (const position2d< T > &pos) const
	move right by given numbers
rect< T > &	operator+= (const position2d< T > &pos)
	move right by given numbers
rect< T >	operator- (const position2d< T > &pos) const
	move left by given numbers
rect< T > &	operator-= (const position2d< T > &pos)
	move left by given numbers
bool	operator== (const rect< T > &other) const
	equality operator
bool	operator!= (const rect< T > &other) const
	inequality operator
bool	operator< (const rect< T > &other) const
	compares size of rectangles
T	getArea () const
	Returns size of rectangle.
bool	isPointInside (const position2d< T > &pos) const
	Returns if a 2d point is within this rectangle.
bool	isRectCollided (const rect< T > &other) const
	Check if the rectangle collides with another rectangle.
void	clipAgainst (const rect< T > &other)
	Clips this rectangle with another one.
bool	constrainTo (const rect< T > &other)
	Moves this rectangle to fit inside another one.
T	getWidth () const
	Get width of rectangle.
T	getHeight () const
	Get height of rectangle.
void	repair ()
	If the lower right corner of the rect is smaller then the upper left, the points are swapped.
bool	isValid () const
	Returns if the rect is valid to draw.
position2d< T >	getCenter () const
	Get the center of the rectangle.
dimension2d< T >	getSize () const
	Get the dimensions of the rectangle.
void	addInternalPoint (const position2d< T > &p)
	Adds a point to the rectangle.
void	addInternalPoint (T x, T y)
	Adds a point to the bounding rectangle.

Public Attributes
position2d< T >	UpperLeftCorner
	Upper left corner.
position2d< T >	LowerRightCorner
	Lower right corner.

Detailed Description

template<class T>
class jpp::core::rect< T >

Rectangle template.

Mostly used by 2D GUI elements and for 2D drawing methods. It has 2 positions instead of position and dimension and a fast method for collision detection with other rectangles and points.

Coordinates are (0,0) for top-left corner, and increasing to the right and to the bottom.

Member Function Documentation

addInternalPoint() [1/2]

template<class T >

void jpp::core::rect< T >::addInternalPoint ( const position2d< T > &  p )

inline

Adds a point to the rectangle.

Causes the rectangle to grow bigger if point is outside of the box

Parameters

p	Point to add to the box.

addInternalPoint() [2/2]

template<class T >

void jpp::core::rect< T >::addInternalPoint ( T  x, T  y  )

inline

Adds a point to the bounding rectangle.

Causes the rectangle to grow bigger if point is outside of the box

Parameters

x	X-Coordinate of the point to add to this box.
y	Y-Coordinate of the point to add to this box.

clipAgainst()

template<class T >

void jpp::core::rect< T >::clipAgainst ( const rect< T > &  other )

inline

Clips this rectangle with another one.

Parameters

other

Rectangle to clip with

constrainTo()

template<class T >

bool jpp::core::rect< T >::constrainTo ( const rect< T > &  other )

inline

Moves this rectangle to fit inside another one.

Returns

True on success, false if not possible

isPointInside()

template<class T >

bool jpp::core::rect< T >::isPointInside ( const position2d< T > &  pos ) const

inline

Returns if a 2d point is within this rectangle.

Parameters

pos	Position to test if it lies within this rectangle.

Returns

True if the position is within the rectangle, false if not.

isRectCollided()

template<class T >

bool jpp::core::rect< T >::isRectCollided ( const rect< T > &  other ) const

inline

Check if the rectangle collides with another rectangle.

Parameters

other

Rectangle to test collision with

Returns

True if the rectangles collide.

isValid()

template<class T >

bool jpp::core::rect< T >::isValid ( ) const

inline

Returns if the rect is valid to draw.

It would be invalid if the UpperLeftCorner is lower or more right than the LowerRightCorner.

---

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

• include/jimcpp/core/engine/rect.hpp