# SbBox2f Class Reference
[Base classes]

`#include <Inventor/SbBox.h>`

List of all members.

## Detailed Description

The SbBox2f class is a 2 dimensional box with floating point corner coordinates.

This box class is used by many other classes in Coin for data exchange and storage. It provides two box corners with floating point coordinates, which is among other things useful for representing screen or canvas dimensions in normalized coordinates.

See also:
  SbBox2s, SbBox3f

## Public Member Functions

| SbBox2f (void)
| SbBox2f (float xmin, float ymin, float xmax, float ymax)
| SbBox2f (const SbVec2f &min, const SbVec2f &max)
| ~SbBox2f (void)
const SbVec2f & | getMin (void) const
const SbVec2f & | getMax (void) const
SbVec2f | getCenter (void) const
void | extendBy (const SbVec2f &point)
void | extendBy (const SbBox2f &box)
SbBool | intersect (const SbVec2f &point) const
SbBool | intersect (const SbBox2f &box) const
SbVec2f | getClosestPoint (const SbVec2f &p) const
void | setBounds (float xmin, float ymin, float xmax, float ymax)
void | setBounds (const SbVec2f &min, const SbVec2f &max)
void | getBounds (float &xmin, float &ymin, float &xmax, float &ymax) const
void | getBounds (SbVec2f &min, SbVec2f &max) const
void | getOrigin (float &x0, float &y0) const
void | getSize (float &w, float &h) const
float | getAspectRatio (void) const
void | makeEmpty (void)
SbBool | isEmpty (void) const
SbBool | hasArea (void) const

## Friends

int | operator== (const SbBox2f &b1, const SbBox2f &b2)
int | operator!= (const SbBox2f &b1, const SbBox2f &b2)

## Constructor & Destructor Documentation

SbBox2f::SbBox2f | ( | void |  | ) |

| The default constructor makes an empty box.

SbBox2f::SbBox2f | ( | float | xmin,
|  | float | ymin,
|  | float | xmax,
|  | float | ymax
| ) |

| Constructs a box with the given corners. xmin should be less than xmax and ymin should be less than ymax if you want to make a valid box.

SbBox2f::SbBox2f | ( | const SbVec2f & | min,
|  | const SbVec2f & | max
| ) |

| Constructs a box with the given lower left and upper right corners. The coordinates of min should be less than the coordinates of max if you want to make a valid box.

SbBox2f::~SbBox2f | ( | void |  | ) |

| Destructor.

## Member Function Documentation

const SbVec2f & SbBox2f::getMin | ( | void |  | ) | const

Returns the lower left corner of the box.

See also:
  getOrigin(), getMax().

const SbVec2f & SbBox2f::getMax | ( | void |  | ) | const

Returns the upper right corner of the box.

See also:
  getMin().

SbVec2f SbBox2f::getCenter | ( | void |  | ) | const

| Returns the center point of the box.

void SbBox2f::extendBy | ( | const SbVec2f & | point | ) |

| Extend the boundaries of the box by the given point, i.e. make the box fit around the point if it isn't already situated within it.

void SbBox2f::extendBy | ( | const SbBox2f & | box | ) |

| Extend the boundaries of the box by the given box parameter. This is equal to calling the above method twice with the corner points.

SbBool SbBox2f::intersect | ( | const SbVec2f & | point | ) | const

| Check if point lies within the boundaries of this box.

SbBool SbBox2f::intersect | ( | const SbBox2f & | box | ) | const

| Check if box lies wholly or partly within the boundaries of this box.

SbVec2f SbBox2f::getClosestPoint | ( | const SbVec2f & | p | ) | const

| Return the point on the box closest to the given point p.

void SbBox2f::setBounds | ( | float | xmin,
|  | float | ymin,
|  | float | xmax,
|  | float | ymax
| ) |

Reset the boundaries of the box.

xmin should be less than xmax and ymin should be less than ymax if you want to make a valid box.

See also:
  getBounds().

void SbBox2f::setBounds | ( | const SbVec2f & | min,
|  | const SbVec2f & | max
| ) |

Reset the boundaries of the box with the given corners.

The coordinates of min should be less than the coordinates of max if you want to make a valid box.

See also:
  getBounds().

void SbBox2f::getBounds | ( | float & | xmin,
|  | float & | ymin,
|  | float & | xmax,
|  | float & | ymax
| ) | const

Returns the box boundaries.

See also:
  setBounds(), getMin(), getMax().

void SbBox2f::getBounds | ( | SbVec2f & | min,
|  | SbVec2f & | max
| ) | const

Returns the box corner points.

See also:
  setBounds(), getMin(), getMax().

void SbBox2f::getOrigin | ( | float & | x0,
|  | float & | y0
| ) | const

Returns the coordinates of the box origin (i.e. the lower left corner).

See also:
  getMin().

void SbBox2f::getSize | ( | float & | w,
|  | float & | h
| ) | const

| Returns width and height of box.

float SbBox2f::getAspectRatio | ( | void |  | ) | const

| Returns aspect ratio of box, which is defined as box width divided on box height.

void SbBox2f::makeEmpty | ( | void |  | ) |

Marks this as an empty box.

See also:
  isEmpty().

SbBool SbBox2f::isEmpty | ( | void |  | ) | const

Check if this has been marked as an empty box.

See also:
  makeEmpty().

SbBool SbBox2f::hasArea | ( | void |  | ) | const

| Check if the box has "positive" area, i.e. the lower left corner is actually lower and more to the left than the other corner point.

## Friends And Related Function Documentation

int operator== | ( | const SbBox2f & | b1,
|  | const SbBox2f & | b2
| ) | `[friend]`

| Check b1 and b2 for equality.

int operator!= | ( | const SbBox2f & | b1,
|  | const SbBox2f & | b2
| ) | `[friend]`

| Check b1 and b2 for inequality.

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

- SbBox2f.h
- SbBox2f.cpp