实施对点数有限制. GL_POINT_SIZE_RANGE可用于获取此限制，但通常会小于400.较大的磅值将被限制在此范围内.

Implementations have a limitation on the size of points. The GL_POINT_SIZE_RANGE can be used to fetch this limit, but it will generally be rather less than 400. A larger point size will be clamped to this range.