glPointParameter — specify point parameters
void glPointParameterf(
|
GLenum pname, |
GLfloat param); |
void glPointParameteri(
|
GLenum pname, |
GLint param); |
void glPointParameterfv(
|
GLenum pname, |
const GLfloat * params); |
void glPointParameteriv(
|
GLenum pname, |
const GLint * params); |
pname
Specifies a single-valued point parameter.
GL_POINT_FADE_THRESHOLD_SIZE, and
GL_POINT_SPRITE_COORD_ORIGIN
are accepted.
param
For glPointParameterf and
glPointParameteri, specifies the
value that pname will be set to.
params
For glPointParameterfv and
glPointParameteriv, specifies a
pointer to an array where the value or values to be
assigned to pname are stored.
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
| 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 |
glPointParameterf
|
✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
glPointParameterfv
|
✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
glPointParameteri
|
✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
glPointParameteriv
|
✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ | ✔ |
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