Glfog - HP b2600 Reference Manual

glFog

glFogf, glFogi, glFogfv, glFogiv: specify fog parameters.
C Specification
void glFogf(
void glFogi(
void glFogfv(
void glFogiv(
Parameters
pname
param
pname
params
Description
Fog is initially disabled. While enabled, fog affects rasterized geometry, bitmaps, and
pixel blocks, but not buffer clear operations. To enable and disable fog, call glEnable and
glDisable with argument GL_FOG.
glFog assigns the value or values in params to the fog parameter specified by pname.
The following values are accepted for pname:
GL_FOG_MODE
params is a single integer or floating-point value that specifies the equation to be used to
compute the fog blend factor, f. Three symbolic constants are accepted: GL_LINEAR,
GL_EXP, and GL_EXP2. The equations corresponding to these symbolic constants are
defined below. The initial fog mode is GL_EXP.
GL_FOG_DENSITY
Chapter 6
GLenum pname,
GLfloat param)
GLenum pname,
GLint param)
GLenum pname,
const GLfloat *params)
GLenum pname,
const GLint *params)
Specifies a single-valued fog parameter. GL_FOG_MODE,
GL_FOG_DENSITY, GL_FOG_START, GL_FOG_END, and
GL_FOG_INDEX are accepted.
Specifies the value that pname will be set to.
Specifies a fog parameter. GL_FOG_MODE, GL_FOG_DENSITY,
GL_FOG_START, GL_FOG_END, GL_FOG_INDEX, and
GL_FOG_COLOR are accepted.
Specifies the value or values to be assigned to pname.
GL_FOG_COLOR requires an array of four values. All other
parameters accept an array containing only a single value.
F
glFog
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