Writing compute shaders

Compute shaders are used, as the name suggests, for general mathematical calculations. They are executed in (local) groups of a defined, three-dimensional size, which may have access to a common set of data. At the same time, many local groups can be executed to generate results faster.

How to do it...

1. Create a text file. Select a name for the file, but use a comp extension for it (for example, shader.comp).
2. Insert #version 450 in the first line of the file.
3. Using an input layout qualifier, define the size of the local workgroup:

layout( local_size_x = <x size>, local_size_y = <y size>, local_size_z = <z size> ) in;

4. Define uniform variables that correspond to descriptor resources created in the application. To define a uniform variable:
   1. Specify the number of descriptor set and a binding number in which a given resource can be accessed:layout (set=<set index>, binding=<binding index>)
   2. Provide a uniform storage qualifier
   3. Specify the type of the...