glIndex
[New
- Windows 95, OEM Service Release 2]
glIndexd,
glIndexf, glIndexi, glIndexs, glIndexdv, glIndexfv, glIndexiv, glIndexsv
These
functions set the current color index.
void glIndexd(
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GLdouble c |
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); |
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void glIndexf(
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GLfloat c |
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); |
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void glIndexi(
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GLint c |
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); |
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void glIndexs(
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GLshort c |
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); |
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Parameters
c
The new value
for the current color index.
void glIndexdv(
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const GLdouble *c |
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); |
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void glIndexfv(
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const GLfloat *c |
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); |
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void glIndexiv(
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const GLint *c |
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); |
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void glIndexsv(
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const GLshort *c |
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); |
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Parameters
c
A pointer to
a one-element array that contains the new value for the current color index.
Remarks
The
glIndex function updates the current (single-valued) color index. It takes
one argument: the new value for the current color index.
The current
index is stored as a floating-point value. Integer values are converted
directly to floating-point values, with no special mapping.
Index values
outside the representable range of the color-index buffer are not clamped.
However, before an index is dithered (if enabled) and written to the frame
buffer, it is converted to fixed-point format. Any bits in the integer portion
of the resulting fixed-point value that do not correspond to bits in the frame
buffer are masked out.
The current
index can be updated at any time. In particular, glIndex can be called
between a call to glBegin and the corresponding call to glEnd.
The following
function retrieves information related to glIndex:
glGet with
argument GL_CURRENT_INDEX
See Also