1991-2006 Silicon Graphics, Inc. glPointParameter 3G glPointParameter specify point parameters void glPointParameterf GLenum pname GLfloat param void glPointParameteri GLenum pname GLint param pname Specifies a single-valued point parameter. GL_POINT_SIZE_MIN, GL_POINT_SIZE_MAX, GL_POINT_FADE_THRESHOLD_SIZE, and GL_POINT_SPRITE_COORD_ORIGIN are accepted. param Specifies the value that pname will be set to. void glPointParameterfv GLenum pname const GLfloat * params void glPointParameteriv GLenum pname const GLint * params pname Specifies a point parameter. GL_POINT_SIZE_MIN, GL_POINT_SIZE_MAX, GL_POINT_DISTANCE_ATTENUATION, GL_POINT_FADE_THRESHOLD_SIZE, and GL_POINT_SPRITE_COORD_ORIGIN are accepted. params Specifies the value or values to be assigned to pname. GL_POINT_DISTANCE_ATTENUATION requires an array of three values. All other parameters accept an array containing only a single value. The following values are accepted for pname: GL_POINT_SIZE_MIN params is a single floating-point value that specifies the minimum point size. The default value is 0.0. GL_POINT_SIZE_MAX params is a single floating-point value that specifies the maximum point size. The default value is 1.0. GL_POINT_FADE_THRESHOLD_SIZE params is a single floating-point value that specifies the threshold value to which point sizes are clamped if they exceed the specified value. The default value is 1.0. GL_POINT_DISTANCE_ATTENUATION params is an array of three floating-point values that specify the coefficients used for scaling the computed point size. The default values are 1 0 0 . GL_POINT_SPRITE_COORD_ORIGIN params is a single enum specifying the point sprite texture coordinate origin, either GL_LOWER_LEFT or GL_UPPER_LEFT. The default value is GL_UPPER_LEFT. glPointParameter is available only if the GL version is 1.4 or greater. GL_POINT_SPRITE_COORD_ORIGIN is available only if the GL version is 2.0 or greater. GL_INVALID_VALUE is generated If the value specified for GL_POINT_SIZE_MIN, GL_POINT_SIZE_MAX, or GL_POINT_FADE_THRESHOLD_SIZE is less than zero. GL_INVALID_ENUM is generated If the value specified for GL_POINT_SPRITE_COORD_ORIGIN is not GL_LOWER_LEFT or GL_UPPER_LEFT. If the value for GL_POINT_SIZE_MIN is greater than GL_POINT_SIZE_MAX, the point size after clamping is undefined, but no error is generated. glGet with argument GL_POINT_SIZE_MIN glGet with argument GL_POINT_SIZE_MAX glGet with argument GL_POINT_FADE_THRESHOLD_SIZE glGet with argument GL_POINT_DISTANCE_ATTENUATION glGet with argument GL_POINT_SPRITE_COORD_ORIGIN glPointSize Copyright 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.