glClearIndex.3G man page

glClearIndex — specify the clear value for the color index buffers

C Specification

void glClearIndex(GLfloat c);

Parameters

c

Specifies the index used when the color index buffers are cleared. The initial value is 0.

Description

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.

Errors

GL_INVALID_OPERATION is generated if glClearIndex is executed between the execution of glBegin() and the corresponding execution of glEnd().

Associated Gets

glGet() with argument GL_INDEX_CLEAR_VALUE

glGet() with argument GL_INDEX_BITS

See Also

glClear()

Authors

opengl.org

Info

02/04/2016 opengl.org OpenGL Manual