glPointSize.3G man page

glPointSize — specify the diameter of rasterized points

C Specification

void glPointSize(GLfloat size);



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


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.


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.


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

See Also

glEnable(), glPointParameter()


07/13/2018 [FIXME: source] [FIXME: manual]