Textures

Up until now every Structure was rendered with a colored rectangle and some text.
I added support for rendering textures/images via OpenGL. With the image crate I am now able to load and convert images to a GPU-friendly format.
I introduced GlShapes to hold all the different texture and quad shapes. I create a single instance of it, so there’s only ever one GPU (texture) allocation for every GlShape / Structure type:

pub struct GlShapes {
    pub quad: GlColorQuad,
    pub furnace: GlTexQuad,
    pub belt: GlTexQuad,
    ...
}

The GlFoo types implement a render() method that can then be used to render for example the Structures of a Blueprint:

...
match structure {
    Structure::Furnace(_) => {
        self.shapes
            .furnace
            .render(0.5, &from_matrix4(&model), &view, &perspective)
    }
    Structure::Arm(_) => {
        self.shapes
            .arm
            .render(0.5, &from_matrix4(&model), &view, &perspective)
    }
...

All that was left now was to use my years of experience as software developer to create some of the most stunning and photorealistic graphics: