OpenGL 4.2 (Compatibility Profile) - April 27, 2012

2.8. VERTEX ARRAYS 42
secondary color, color index, edge flag, fog coordinate, or texture coordinate array,
respectively.
An individual generic vertex attribute array is enabled or disabled by calling
one of
void EnableVertexAttribArray( uint index );
void DisableVertexAttribArray( uint index );
where index identifies the generic vertex attribute array to enable or disable.
An INVALID_VALUE error is generated if index is greater than or equal to
MAX_VERTEX_ATTRIBS.
The command
void VertexAttribDivisor( uint index, uint divisor );
modifies the rate at which generic vertex attributes advance when rendering multiple
instances of primitives in a single draw call. If divisor is zero, the attribute at
slot index advances once per vertex. If divisor is non-zero, the attribute advances
once per divisor instances of the primitives being rendered. An attribute is referred
to as instanced if its divisor value is non-zero.
An INVALID_VALUE error is generated if index is greater than or equal to the
value of MAX_VERTEX_ATTRIBS.
The command
void ClientActiveTexture( enum texture );
is used to select the vertex array client state parameters to be modified by the Tex-
CoordPointer command and the array affected by EnableClientState and DisableClientState
with parameter TEXTURE_COORD_ARRAY. This command sets the
client state variable CLIENT_ACTIVE_TEXTURE. Each texture coordinate set has
a client state vector which is selected when this command is invoked. This state
vector includes the vertex array state. This call also selects the texture coordinate
set state used for queries of client state.
Specifying an invalid texture generates the error INVALID_ENUM. Valid values
of texture are the same as for the MultiTexCoord commands described in section
2.7.
The command
void ArrayElementInstanced( int i, int instance );
OpenGL 4.2 (Compatibility Profile) - April 27, 2012