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# docs.GL

GLSL 4
GLSL ES 3

# outerProduct

## Name

outerProduct — calculate the outer product of a pair of vectors

## Declaration

`mat2 outerProduct(` | vec2 c,
| vec2 r`)`;

`mat3 outerProduct(` | vec3 c,
| vec3 r`)`;

`mat4 outerProduct(` | vec4 c,
| vec4 r`)`;

`mat2x3 outerProduct(` | vec3 c,
| vec2 r`)`;

`mat3x2 outerProduct(` | vec2 c,
| vec3 r`)`;

`mat2x4 outerProduct(` | vec4 c,
| vec2 r`)`;

`mat4x2 outerProduct(` | vec2 c,
| vec4 r`)`;

`mat3x4 outerProduct(` | vec4 c,
| vec3 r`)`;

`mat4x3 outerProduct(` | vec3 c,
| vec4 r`)`;

`dmat2 outerProduct(` | dvec2 c,
| dvec2 r`)`;

`dmat3 outerProduct(` | dvec3 c,
| dvec3 r`)`;

`dmat4 outerProduct(` | dvec4 c,
| dvec4 r`)`;

`dmat2x3 outerProduct(` | dvec3 c,
| dvec2 r`)`;

`dmat3x2 outerProduct(` | dvec2 c,
| dvec3 r`)`;

`dmat2x4 outerProduct(` | dvec4 c,
| dvec2 r`)`;

`dmat4x2 outerProduct(` | dvec2 c,
| dvec4 r`)`;

`dmat3x4 outerProduct(` | dvec4 c,
| dvec3 r`)`;

`dmat4x3 outerProduct(` | dvec3 c,
| dvec4 r`)`;

## Parameters

`c`

  Specifies the parameter to be treated as a column vector.

`r`

  Specifies the parameter to be treated as a row vector.

## Description

`outerProduct` treats the first parameter `c` as a column vector (matrix with one column) and the second parameter `r` as a row vector (matrix with one row) and does a linear algebraic matrix multiply `c` * `r`, yielding a matrix whose number of rows is the number of components in `c` and whose number of columns is the number of components in `r`.

## Version Support

| OpenGL Shading Language Version
--- | ---
Function Name | 1.10 | 1.20 | 1.30 | 1.40 | 1.50 | 3.30 | 4.00 | 4.10 | 4.20 | 4.30 | 4.40 | 4.50
outerProduct (float) | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔
outerProduct (double) | - | - | - | - | - | - | ✔ | ✔ | ✔ | ✔ | ✔ | ✔

## See Also

dot

## Copyright

Copyright © 2011-2014 Khronos Group. This material may be distributed subject to the terms and conditions set forth in the Open Publication License, v 1.0, 8 June 1999. https://opencontent.org/openpub/.

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