A uniform is a global Shader variable. These act as parameters that the user of a shader program can pass to that program. Uniforms are so named because they do not change from one shader invocation to the next within a particular rendering call thus their value is uniform among all invocations. This makes them unlike shader stage inputs and outputs, which are often different for each invocation of a shader stage.

A BindGroup describes a set of resources and how they can be accessed by a shader. TODO: maybe this is a WGSL thing, not a wgpu thing.

linear