1991-2006 Silicon Graphics, Inc. glClearIndex 3G glClearIndex specify the clear value for the color index buffers void glClearIndex GLfloat c c Specifies the index used when the color index buffers are cleared. The initial value is 0. glClearIndex specifies the index used by glClear to clear the color index buffers. c is not clamped. Rather, c is converted to a fixed-point value with unspecified precision to the right of the binary point. The integer part of this value is then masked with 2 m - 1 , where m is the number of bits in a color index stored in the frame buffer. GL_INVALID_OPERATION is generated if glClearIndex is executed between the execution of glBegin and the corresponding execution of glEnd. glGet with argument GL_INDEX_CLEAR_VALUE glGet with argument GL_INDEX_BITS glClear Copyright 1991-2006 Silicon Graphics, Inc. This document is licensed under the SGI Free Software B License. For details, see http://oss.sgi.com/projects/FreeB/.