---
name: "SbBox2d"
section: "3"
platform: "linux"
package: "coin"
version: "1:4.0.10-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/SbBox2d"
---

# SbBox2d(3)

The SbBox2d class is a 2 dimensional box with double precision corner coordinates.

## NAME

SbBox2d - The **SbBox2d** class is a 2 dimensional box with double precision corner coordinates.

## SYNOPSIS

\#include \<Inventor/SbBox2d.h\>

### Public Member Functions

**SbBox2d** (void)\
 **SbBox2d** (double xmin, double ymin, double xmax, double ymax)\
 **SbBox2d** (const **SbVec2d** &minpoint, const **SbVec2d** &maxpoint)\
 **SbBox2d** (const **SbBox2f** &box)\
 **SbBox2d** (const **SbBox2s** &box)\
 **SbBox2d** (const **SbBox2i32** &box)\
 **SbBox2d** & **setBounds** (double xmin, double ymin, double xmax, double ymax)\
 **SbBox2d** & **setBounds** (const **SbVec2d** &minpoint, const **SbVec2d** &maxpoint)\
 **SbBox2d** & **setBounds** (const **SbBox2f** &box)\
 **SbBox2d** & **setBounds** (const **SbBox2s** &box)\
 **SbBox2d** & **setBounds** (const **SbBox2i32** &box)\
 void **getBounds** (double &xmin, double &ymin, double &xmax, double &ymax) const\
 void **getBounds** (**SbVec2d** &minpoint, **SbVec2d** &maxpoint) const\
 const **SbVec2d** & **getMin** (void) const\
 **SbVec2d** & **getMin** (void)\
 const **SbVec2d** & **getMax** (void) const\
 **SbVec2d** & **getMax** (void)\
 void **extendBy** (const **SbVec2d** &point)\
 void **extendBy** (const **SbBox2d** &box)\
 void **makeEmpty** (void)\
 SbBool **isEmpty** (void) const\
 SbBool **hasArea** (void) const\
 SbBool **intersect** (const **SbVec2d** &point) const\
 SbBool **intersect** (const **SbBox2d** &box) const\
 **SbVec2d** **getClosestPoint** (const **SbVec2d** &p) const\
 SbBool **findIntersection** (const **SbVec2d** &a, const **SbVec2d** &b, **SbVec2d** &ia, **SbVec2d** &ib) const\
 **SbVec2d** **getCenter** (void) const\
 void **getOrigin** (double &originX, double &originY) const\
 void **getSize** (double &sizeX, double &sizeY) const\
 **SbVec2d** **getSize** (void) const\
 double **getAspectRatio** (void) const\

### Related Symbols

(Note that these are not member symbols.)  int **operator==** (const **SbBox2d** &b1, const **SbBox2d** &b2)\
 int **operator!=** (const **SbBox2d** &b1, const **SbBox2d** &b2)\

## Detailed Description

The **SbBox2d** class is a 2 dimensional box with double precision corner coordinates.

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

This class is a Coin extension.

**See also**

**SbBox2s**, **SbBox2f**, **SbBox3s**, **SbBox3f**, **SbBox3d**, **SbXfBox3f**.

**Since**

Coin 2.0

TGS Inventor 2.6

## Constructor & Destructor Documentation

### SbBox2d::SbBox2d (void ) \[inline\]

The default constructor makes an empty box.

### SbBox2d::SbBox2d (double xmin, double ymin, double xmax, double ymax) \[inline\]

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.

### SbBox2d::SbBox2d (const SbVec2d & min, const SbVec2d & max) \[inline\]

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.

### SbBox2d::SbBox2d (const SbBox2f & box) \[inline\], \[explicit\]

Constructs an **SbBox2d** instance from the value in an **SbBox2f** instance.

**Since**

Coin 2.5

### SbBox2d::SbBox2d (const SbBox2s & box) \[inline\], \[explicit\]

Constructs an **SbBox2d** instance from the value in an **SbBox2s** instance.

**Since**

Coin 2.5

### SbBox2d::SbBox2d (const SbBox2i32 & box) \[inline\], \[explicit\]

Constructs an **SbBox2d** instance from the value in an **SbBox2i32** instance.

**Since**

Coin 2.5

## Member Function Documentation

### SbBox2d & SbBox2d::setBounds (double xmin, double ymin, double xmax, double ymax) \[inline\]

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.

Returns reference to self.

**See also**

**getBounds()**.

### SbBox2d & SbBox2d::setBounds (const SbVec2d & min, const SbVec2d & max) \[inline\]

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.

Returns reference to self.

**See also**

**getBounds()**.

### SbBox2d & SbBox2d::setBounds (const SbBox2f & box)

Reset the boundaries of the box with the given *box* boundaries.

Returns reference to self.

**See also**

**getBounds()**

### SbBox2d & SbBox2d::setBounds (const SbBox2s & box)

Reset the boundaries of the box with the given *box* boundaries.

Returns reference to self.

**See also**

**getBounds()**

### SbBox2d & SbBox2d::setBounds (const SbBox2i32 & box)

Reset the boundaries of the box with the given *box* boundaries.

Returns reference to self.

**See also**

**getBounds()**

### void SbBox2d::getBounds (double & xmin, double & ymin, double & xmax, double & ymax) const \[inline\]

Returns the box boundaries.

**See also**

**setBounds()**, **getMin()**, **getMax()**.

### void SbBox2d::getBounds (SbVec2d & min, SbVec2d & max) const \[inline\]

Returns the box min and max corner points.

**See also**

**setBounds()**, **getMin()**, **getMax()**.

### const SbVec2d & SbBox2d::getMin (void ) const \[inline\]

Returns the lower left corner of the box.

**See also**

**getOrigin()**, **getMax()**.

### SbVec2d & SbBox2d::getMin (void ) \[inline\]

Returns the lower left corner of the box.

**See also**

**getOrigin()**, **getMax()**.

### const SbVec2d & SbBox2d::getMax (void ) const \[inline\]

Returns the upper right corner of the box.

**See also**

**getMin()**.

### SbVec2d & SbBox2d::getMax (void ) \[inline\]

Returns the upper right corner of the box.

**See also**

**getMin()**.

### void SbBox2d::extendBy (const SbVec2d & 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 SbBox2d::extendBy (const SbBox2d & 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.

### void SbBox2d::makeEmpty (void )

Marks this as an empty box.

**See also**

**isEmpty()**.

### SbBool SbBox2d::isEmpty (void ) const \[inline\]

Check if this has been marked as an empty box.

**See also**

**makeEmpty()**.

### SbBool SbBox2d::hasArea (void ) const \[inline\]

Check if the box has been correctly specified and by that virtue has "positive" area, i.e. all coordinates of its upper right corner (the maximum point) are greater than the corresponding coordinates of its lower left corner (the minimum point).

### SbBool SbBox2d::intersect (const SbVec2d & point) const

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

### SbBool SbBox2d::intersect (const SbBox2d & box) const

Check if *box* lies entirely or partially within the boundaries of this box.

### SbVec2d SbBox2d::getClosestPoint (const SbVec2d & point) const

Return the point on the box closest to the given point *p*. If the given point equals the center, the center point on the positive X-side is returned.

### SbBool SbBox2d::findIntersection (const SbVec2d & a, const SbVec2d & b, SbVec2d & ia, SbVec2d & ib) const

Check if a a line from *a* to *b* intersects the box, and return the coordinates of the union line in *ia* and *ib*.

This function is a Coin extension.

### SbVec2d SbBox2d::getCenter (void ) const \[inline\]

Returns the center point of the box.

### void SbBox2d::getOrigin (double & originX, double & originY) const \[inline\]

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

**See also**

**getMin()**.

### void SbBox2d::getSize (double & sizeX, double & sizeY) const \[inline\]

Returns width and height of box.

### SbVec2d SbBox2d::getSize (void ) const \[inline\]

Returns width and height of box as a 2D vector.

**Since**

Coin 3.0

### double SbBox2d::getAspectRatio (void ) const \[inline\]

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

## Friends And Related Symbol Documentation

### int operator== (const SbBox2d & b1, const SbBox2d & b2) \[related\]

Check *b1* and *b2* for equality.

### int operator!= (const SbBox2d & b1, const SbBox2d & b2) \[related\]

Check *b1* and *b2* for inequality.

## Author

Generated automatically by Doxygen for Coin from the source code.