HP b2600 Reference Manual page 61

void glColor4fv(
void glColor4iv(
void glColor4sv(
void glColor4ubv(
void glColor4uiv(
void glColor4usv(
Parameters
red, green, blue
alpha
v
Description
The GL stores both a current single-valued color index and a 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 format, 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. However, 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.
Chapter 3
const GLfloat *v)
const GLint *v)
const GLshort *v)
const GLubyte *v)
const GLuint *v)
const GLushort *v)
Specify new red, green, and blue values for the current color.
Specifies a new alpha value for the current color. Included only in the
four-argument glColor4 commands.
Specifies a pointer to an array that contains red, green, blue, and
(sometimes) alpha values.
C
glColor
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