## Name

glPointSize — specify the diameter of rasterized points

## C Specification

`void glPointSize(` | GLfloat size`)`;

## Parameters

`size`

  Specifies the diameter of rasterized points. The initial value is 1.

## Description

`glPointSize` specifies the rasterized diameter of points. If point size mode is disabled (see glEnable with parameter `GL_PROGRAM_POINT_SIZE`), this value will be used to rasterize points. Otherwise, the value written to the shading language built-in variable `gl_PointSize` will be used.

## Notes

The point size specified by `glPointSize` is always returned when `GL_POINT_SIZE` is queried. Clamping and rounding for points have no effect on the specified value.

## Errors

`GL_INVALID_VALUE` is generated if `size` is less than or equal to 0.

## Associated Gets

glGet with argument `GL_POINT_SIZE_RANGE`

glGet with argument `GL_POINT_SIZE_GRANULARITY`

glGet with argument `GL_POINT_SIZE`

glGet with argument `GL_POINT_FADE_THRESHOLD_SIZE`

glIsEnabled with argument `GL_PROGRAM_POINT_SIZE`

## Version Support

| OpenGL Version
--- | ---
Function / Feature Name | 2.0 | 2.1 | 3.0 | 3.1 | 3.2 | 3.3 | 4.0 | 4.1 | 4.2 | 4.3 | 4.4 | 4.5
`glPointSize` | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔

## See Also

glEnable, glPointParameter

## Copyright

Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010-2014 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.