glutGetColor.man
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- ."
- ." Copyright (c) Mark J. Kilgard, 1996.
- ."
- .TH glutGetColor 3GLUT "3.7" "GLUT" "GLUT"
- .SH NAME
- glutGetColor - retrieves a red, green, or blue component for a given
- color index colormap entry for the layer in use's logical colormap for the
- current window.
- .SH SYNTAX
- .nf
- .LP
- GLfloat glutGetColor(int cell, int component);
- .fi
- .SH ARGUMENTS
- .IP fIcellfP 1i
- Color cell index (starting at zero).
- .IP fIcomponentfP 1i
- One of GLUT_RED, GLUT_GREEN, or GLUT_BLUE.
- .SH DESCRIPTION
- glutGetColor retrieves a red, green, or blue component for a given
- color index colormap entry for the current window's logical colormap.
- The current window should be a color index window. cell should be
- zero or greater and less than the total number of colormap entries for the
- window. For valid color indices, the value returned is a floating point
- value between 0.0 and 1.0 inclusive. glutGetColor will return -1.0 if
- the color index specified is an overlay's transparent index, less than zero,
- or greater or equal to the value returned by
- glutGet(GLUT_WINDOW_COLORMAP_SIZE), that is if the color index
- is transparent or outside the valid range of color indices.
- .SH SEE ALSO
- glutGet, glutSetColor, glutCopyColormap
- .SH AUTHOR
- Mark J. Kilgard (mjk@nvidia.com)