---
name: "SbVec2d"
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/SbVec2d"
---

# SbVec2d(3)

The SbVec2d class is a 2 dimensional vector with double precision floating point coordinates.

## NAME

SbVec2d - The **SbVec2d** class is a 2 dimensional vector with double precision floating point coordinates.

## SYNOPSIS

\#include \<Inventor/SbVec2d.h\>

### Public Member Functions

**SbVec2d** (void)\
 **SbVec2d** (const double v\[2\])\
 **SbVec2d** (double x, double y)\
 **SbVec2d** (const **SbVec2f** &v)\
 **SbVec2d** (const **SbVec2b** &v)\
 **SbVec2d** (const **SbVec2s** &v)\
 **SbVec2d** (const **SbVec2i32** &v)\
 **SbVec2d** & **setValue** (const double v\[2\])\
 **SbVec2d** & **setValue** (double x, double y)\
 **SbVec2d** & **setValue** (const **SbVec2f** &v)\
 **SbVec2d** & **setValue** (const **SbVec2b** &v)\
 **SbVec2d** & **setValue** (const **SbVec2s** &v)\
 **SbVec2d** & **setValue** (const **SbVec2i32** &v)\
 const double \* **getValue** (void) const\
 void **getValue** (double &x, double &y) const\
 double & **operator\[\]** (int i)\
 const double & **operator\[\]** (int i) const\
 SbBool **equals** (const **SbVec2d** &v, double tolerance) const\
 double **dot** (const **SbVec2d** &v) const\
 double **length** (void) const\
 double **sqrLength** (void) const\
 double **normalize** (void)\
 void **negate** (void)\
 **SbVec2d** & **operator\*=** (double d)\
 **SbVec2d** & **operator/=** (double d)\
 **SbVec2d** & **operator+=** (const **SbVec2d** &v)\
 **SbVec2d** & **operator-=** (const **SbVec2d** &v)\
 **SbVec2d** **operator-** (void) const\
 void **print** (FILE \*fp) const\

### Protected Attributes

double **vec** \[2\]\

### Related Symbols

(Note that these are not member symbols.)  **SbVec2d** **operator\*** (const **SbVec2d** &v, double d)\
 **SbVec2d** **operator\*** (double d, const **SbVec2d** &v)\
 **SbVec2d** **operator/** (const **SbVec2d** &v, double d)\
 **SbVec2d** **operator+** (const **SbVec2d** &v1, const **SbVec2d** &v2)\
 **SbVec2d** **operator-** (const **SbVec2d** &v1, const **SbVec2d** &v2)\
 int **operator==** (const **SbVec2d** &v1, const **SbVec2d** &v2)\
 int **operator!=** (const **SbVec2d** &v1, const **SbVec2d** &v2)\

## Detailed Description

The **SbVec2d** class is a 2 dimensional vector with double precision floating point coordinates.

This vector class is used by many other classes in Coin. It provides storage for a vector in 2 dimensions as well as simple floating point arithmetic operations on this vector.

**See also**

**SbVec2s**, **SbVec2f**, **SbVec3s**, **SbVec3f**, **SbVec3d**, **SbVec4f**, **SbVec4d**.

## Constructor & Destructor Documentation

### SbVec2d::SbVec2d (void ) \[inline\]

The default constructor does nothing. The vector coordinates will be uninitialized until you do a **setValue()**.

### SbVec2d::SbVec2d (const double v\[2\]) \[inline\]

Constructs an **SbVec2d** instance with initial values from *v*.

### SbVec2d::SbVec2d (double x, double y) \[inline\]

Constructs an **SbVec2d** instance with the initial vector endpoints from *x* and *y*.

### SbVec2d::SbVec2d (const SbVec2f & v) \[inline\], \[explicit\]

Constructs an **SbVec2d** instance from an **SbVec2f** instance.

**Since**

Coin 2.5

### SbVec2d::SbVec2d (const SbVec2b & v) \[inline\], \[explicit\]

Constructs an **SbVec2d** instance from an **SbVec2b** instance.

**Since**

Coin 2.5

### SbVec2d::SbVec2d (const SbVec2s & v) \[inline\], \[explicit\]

Constructs an **SbVec2d** instance from an **SbVec2s** instance.

**Since**

Coin 2.5

### SbVec2d::SbVec2d (const SbVec2i32 & v) \[inline\], \[explicit\]

Constructs an **SbVec2d** instance from an **SbVec2i32** instance.

**Since**

Coin 2.5

## Member Function Documentation

### SbVec2d & SbVec2d::setValue (const double v\[2\]) \[inline\]

Set new x and y coordinates for the vector from *v*. Returns reference to self.

**See also**

**getValue()**.

### SbVec2d & SbVec2d::setValue (double x, double y) \[inline\]

Set new x and y coordinates for the vector. Returns reference to self.

**See also**

**getValue()**.

### SbVec2d & SbVec2d::setValue (const SbVec2f & v)

Sets the value from an **SbVec2f** instance. Returns reference to itself.

**Since**

Coin 2.5

### SbVec2d & SbVec2d::setValue (const SbVec2b & v)

Sets the value from an **SbVec2b** instance. Returns reference to itself.

**Since**

Coin 2.5

### SbVec2d & SbVec2d::setValue (const SbVec2s & v)

Sets the value from an **SbVec2s** instance. Returns reference to itself.

**Since**

Coin 2.5

### SbVec2d & SbVec2d::setValue (const SbVec2i32 & v)

Sets the value from an **SbVec2i32** instance. Returns reference to itself.

**Since**

Coin 2.5

### const double \* SbVec2d::getValue (void ) const \[inline\]

Returns a pointer to an array of two double containing the x and y coordinates of the vector.

**See also**

**setValue()**.

### void SbVec2d::getValue (double & x, double & y) const \[inline\]

Returns the x and y coordinates of the vector.

**See also**

**setValue()**.

### double & SbVec2d::operator\[\] (int i) \[inline\]

Index operator. Returns modifiable x or y coordinate.

**See also**

**getValue()** and **setValue()**.

### const double & SbVec2d::operator\[\] (int i) const \[inline\]

Index operator. Returns x or y coordinate.

**See also**

**getValue()**.

### SbBool SbVec2d::equals (const SbVec2d & v, double tolerance) const

Compares the vector with *v* and returns TRUE if the distance between the vectors is smaller or equal to the square root of *tolerance*.

### double SbVec2d::dot (const SbVec2d & v) const \[inline\]

Calculates and returns the result of taking the dot product of this vector and *v*.

### double SbVec2d::length (void ) const

Return length of vector.

### double SbVec2d::sqrLength (void ) const \[inline\]

Returns the square of the length of the vector.

### double SbVec2d::normalize (void )

Normalize the vector to unit length. Return value is the original length of the vector before normalization.

### void SbVec2d::negate (void ) \[inline\]

Negate the vector (i.e. point it in the opposite direction).

### SbVec2d & SbVec2d::operator\*= (double d) \[inline\]

Multiply components of vector with value *d*. Returns reference to self.

### SbVec2d & SbVec2d::operator/= (double d) \[inline\]

Divides components of vector with value *d*. Returns reference to self.

### SbVec2d & SbVec2d::operator+= (const SbVec2d & v) \[inline\]

Adds this vector and vector *u*. Returns reference to self.

### SbVec2d & SbVec2d::operator-= (const SbVec2d & v) \[inline\]

Subtracts vector *u* from this vector. Returns reference to self.

### SbVec2d SbVec2d::operator- (void ) const \[inline\]

Non-destructive negation operator. Returns a new **SbVec2d** instance which points in the opposite direction of this vector.

**See also**

**negate()**.

### void SbVec2d::print (FILE \* fp) const

Dump the state of this object to the *fp* file stream. Only works in debug version of library, method does nothing in an optimized build.

## Friends And Related Symbol Documentation

### SbVec2d operator\* (const SbVec2d & v, double d) \[related\]

Returns an **SbVec2d** instance which is the components of vector *v* multiplied with *d*.

### SbVec2d operator\* (double d, const SbVec2d & v) \[related\]

Returns an **SbVec2d** instance which is the components of vector *v* multiplied with *d*.

### SbVec2d operator/ (const SbVec2d & v, double d) \[related\]

Returns an **SbVec2d** instance which is the components of vector *v* divided on the scalar factor *d*.

### SbVec2d operator+ (const SbVec2d & v1, const SbVec2d & v2) \[related\]

Returns an **SbVec2d** instance which is the sum of vectors *v1* and *v2*.

### SbVec2d operator- (const SbVec2d & v1, const SbVec2d & v2) \[related\]

Returns an **SbVec2d** instance which is vector *v2* subtracted from vector *v1*.

### int operator== (const SbVec2d & v1, const SbVec2d & v2) \[related\]

Returns *1* if *v1* and *v2* are equal, *0* otherwise.

**See also**

**equals()**.

### int operator!= (const SbVec2d & v1, const SbVec2d & v2) \[related\]

Returns *1* if *v1* and *v2* are not equal, *0* if they are equal.

**See also**

**equals()**.

## Author

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