The index in the argument table for the associated vertex buffer.
The format of the vertex attribute.
The location of an attribute in vertex data, determined by the byte offset from the start of the vertex data.
Increments the receiver’s reference count.
Decrements the receiver’s reference count.
Decrements the receiver’s retain count at the end of the current autorelease pool block.
An object that determines how to store attribute data in memory and map it to the arguments of a vertex function.