tirbofish/dropbear

struct MaterialUniform {
    base_colour: vec4<f32>,

    metallic: f32,
    roughness: f32,

    normal_scale: f32,

    emissive_factor: vec3<f32>,
    emissive_strength: f32,
    
    occlusion_strength: f32,

    uv_tiling: vec2<f32>,
    uv_offset: vec2<f32>,

    alpha_cutoff: f32,
    alpha_mode: u32,

    has_normal_texture: u32,
    has_emissive_texture: u32,
    has_metallic_texture: u32,
    has_occlusion_texture: u32,
}

const ALPHAMODE_OPAQUE: u32 = 1;
const ALPHAMODE_MASK: u32 = 2;
const ALPHAMODE_BLEND: u32 = 3;

@group(1) @binding(0)  var<uniform>  u_material:  MaterialUniform;
@group(1) @binding(1)  var           t_diffuse:   texture_2d<f32>;
@group(1) @binding(2)  var           s_diffuse:   sampler;
@group(1) @binding(3)  var           t_normal:    texture_2d<f32>;
@group(1) @binding(4)  var           s_normal:    sampler;
@group(1) @binding(5)  var           t_emissive:  texture_2d<f32>;
@group(1) @binding(6)  var           s_emissive:  sampler;
@group(1) @binding(7)  var           t_metallic:  texture_2d<f32>;
@group(1) @binding(8)  var           s_metallic:  sampler;
@group(1) @binding(9)  var           t_occlusion: texture_2d<f32>;
@group(1) @binding(10) var           s_occlusion: sampler;