glColorMaterial - cause a material color to track the
current color

glColorMaterial
	glColorMaterial(face, mode) -> None

void glColorMaterial(	GLenum face,
                      GLenum mode )

face	Specifies whether front, back, or both front and back
      material parameters should track the current color.
      Accepted values	are GL_FRONT, GL_BACK, and
      GL_FRONT_AND_BACK.  The	initial	value is
      GL_FRONT_AND_BACK.

mode	Specifies which	of several material parameters track
      the current color.  Accepted values are	GL_EMISSION,
      GL_AMBIENT, GL_DIFFUSE,	GL_SPECULAR, and
      GL_AMBIENT_AND_DIFFUSE.	 The initial value is
      GL_AMBIENT_AND_DIFFUSE.

glColorMaterial specifies which material parameters track
the current color.  When GL_COLOR_MATERIAL is	enabled, the
material parameter or	parameters specified by	mode, of the
material or materials	specified by face, track the current
color	at all times.

To enable and	disable	GL_COLOR_MATERIAL, call	glEnable and
glDisable with argument GL_COLOR_MATERIAL.
GL_COLOR_MATERIAL is initially disabled.

glColorMaterial makes	it possible to change a	subset of
material parameters for each vertex using only the glColor
command, without calling glMaterial.	If only	such a subset
of parameters	is to be specified for each vertex, calling
glColorMaterial is preferable	to calling glMaterial.

Call glColorMaterial before enabling GL_COLOR_MATERIAL.

Calling glDrawElements may leave the current color
indeterminate.  If glColorMaterial is	enabled	while the
current color	is indeterminate, the lighting material	state
specified by face and	mode is	also indeterminate.

If the GL version is 1.1 or greater, and GL_COLOR_MATERIAL
is enabled, evaluated	color values affect the	results	of the
lighting equation as if the current color were being
modified, but	no change is made to the tracking lighting
parameter of the current color.

GL_INVALID_ENUM is generated if face or mode is not an
accepted value.

GL_INVALID_OPERATION is generated if glColorMaterial is
executed between the execution of glBegin and	the
corresponding	execution of glEnd.

glIsEnabled with argument GL_COLOR_MATERIAL
glGet	with argument GL_COLOR_MATERIAL_PARAMETER
glGet	with argument GL_COLOR_MATERIAL_FACE

glColor, glColorPointer, glDrawElements, glEnable, glLight,
glLightModel,	glMaterial