GLCOLOR(3G) UNIX Programmer's Manual GLCOLOR(3G)
NAME
glColor3b, glColor3d, glColor3f, glColor3i, glColor3s,
glColor3ub, glColor3ui, glColor3us, glColor4b, glColor4d,
glColor4f, glColor4i, glColor4s, glColor4ub, glColor4ui,
glColor4us, glColor3bv, glColor3dv, glColor3fv, glColor3iv,
glColor3sv, glColor3ubv, glColor3uiv, glColor3usv,
glColor4bv, glColor4dv, glColor4fv, glColor4iv, glColor4sv,
glColor4ubv, glColor4uiv, glColor4usv - set the current
color
C SPECIFICATION
void glColor3b( GLbyte red,
GLbyte green,
GLbyte blue )
void glColor3d( GLdouble red,
GLdouble green,
GLdouble blue )
void glColor3f( GLfloat red,
GLfloat green,
GLfloat blue )
void glColor3i( GLint red,
GLint green,
GLint blue )
void glColor3s( GLshort red,
GLshort green,
GLshort blue )
void glColor3ub( GLubyte red,
GLubyte green,
GLubyte blue )
void glColor3ui( GLuint red,
GLuint green,
GLuint blue )
void glColor3us( GLushort red,
GLushort green,
GLushort blue )
void glColor4b( GLbyte red,
GLbyte green,
GLbyte blue,
GLbyte alpha )
void glColor4d( GLdouble red,
GLdouble green,
GLdouble blue,
GLdouble alpha )
void glColor4f( GLfloat red,
GLfloat green,
GLfloat blue,
GLfloat alpha )
void glColor4i( GLint red,
GLint green,
GLint blue,
GLint alpha )
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GLCOLOR(3G) UNIX Programmer's Manual GLCOLOR(3G)
void glColor4s( GLshort red,
GLshort green,
GLshort blue,
GLshort alpha )
void glColor4ub( GLubyte red,
GLubyte green,
GLubyte blue,
GLubyte alpha )
void glColor4ui( GLuint red,
GLuint green,
GLuint blue,
GLuint alpha )
void glColor4us( GLushort red,
GLushort green,
GLushort blue,
GLushort alpha )
PARAMETERS
red, green, blue
Specify new red, green, and blue values for
the current color.
alpha Specifies a new alpha value for the current
color. Included only in the four-argument
glColor4 commands.
C SPECIFICATION
void glColor3bv( const GLbyte *v )
void glColor3dv( const GLdouble *v )
void glColor3fv( const GLfloat *v )
void glColor3iv( const GLint *v )
void glColor3sv( const GLshort *v )
void glColor3ubv( const GLubyte *v )
void glColor3uiv( const GLuint *v )
void glColor3usv( const GLushort *v )
void glColor4bv( const GLbyte *v )
void glColor4dv( const GLdouble *v )
void glColor4fv( const GLfloat *v )
void glColor4iv( const GLint *v )
void glColor4sv( const GLshort *v )
void glColor4ubv( const GLubyte *v )
void glColor4uiv( const GLuint *v )
void glColor4usv( const GLushort *v )
PARAMETERS
v Specifies a pointer to an array that contains red,
green, blue, and (sometimes) alpha values.
DESCRIPTION
The GL stores both a current single-valued color index and a
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GLCOLOR(3G) UNIX Programmer's Manual GLCOLOR(3G)
current four-valued RGBA color. glColor sets a new four-
valued RGBA color. glColor has two major variants: glColor3
and glColor4. glColor3 variants specify new red, green, and
blue values explicitly and set the current alpha value to
1.0 (full intensity) implicitly. glColor4 variants specify
all four color components explicitly.
glColor3b, glColor4b, glColor3s, glColor4s, glColor3i, and
glColor4i take three or four signed byte, short, or long
integers as arguments. When v is appended to the name, the
color commands can take a pointer to an array of such
values.
Current color values are stored in floating-point , with
unspecified mantissa and exponent sizes. Unsigned integer
color components, when specified, are linearly mapped to
floating-point values such that the largest representable
value maps to 1.0 (full intensity), and 0 maps to 0.0 (zero
intensity). Signed integer color components, when specified,
are linearly mapped to floating-point values such that the
most positive representable value maps to 1.0, and the most
negative representable value maps to -1.0. (Note that this
mapping does not convert 0 precisely to 0.0.) Floating-point
values are mapped directly.
Neither floating-point nor signed integer values are clamped
to the range [0,1] before the current color is updated. How-
ever, color components are clamped to this range before they
are interpolated or written into a color buffer.
NOTES
The initial value for the current color is (1, 1, 1, 1).
The current color can be updated at any time. In particular,
glColor can be called between a call to glBegin and the
corresponding call to glEnd.
ASSOCIATED GETS
glGet with argument GL_CURRENT_COLOR
glGet with argument GL_RGBA_MODE
SEE ALSO
glIndex(3G)
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