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_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_FADE_THRESHOLD_SIZE, and
GL_POINT_SPRITE_COORD_ORIGIN
are accepted.
params
Specifies the value to be assigned to pname..
The following values are accepted for pname:
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_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.
GL_INVALID_VALUE is generated if the value specified for
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.
glGet with argument GL_POINT_FADE_THRESHOLD_SIZE
glGet with argument GL_POINT_SPRITE_COORD_ORIGIN
Copyright © 1991-2006 Silicon Graphics, Inc. Copyright © 2010 Khronos Group. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.