Macro pass 

macro_rules! pass {
    ($engine: expr, $resources: expr) => { ... };
    ($engine: expr, $resources: expr, $color: expr) => { ... };
}

A macro that creates all the render pass boilerplate with color and depth attachments.

Arguments:

• engine: RenderEngine - The render engine to render too.
• resources: RenderResources - The render resources to render too.

Returns a wgpu::RenderPass instance.