While it is a simple process to query for the location of an individual uniform variable, there may be instances where it can be useful to generate a list of all active uniform variables. For example, one might choose to create a set of variables to store the location of each uniform and assign their values after the program is linked. This would avoid the need to query for uniform locations when setting the value of the uniform variables, creating slightly more efficient code.
The process for listing uniform variables is very similar to the process for listing attributes (see the Getting a list of active vertex input attributes and locations recipe), so this recipe will refer the reader back to the previous recipe for a detailed explanation.
