kiss3d 0.45.0

Keep it simple, stupid, 2D and 3D graphics engine for Rust.
Documentation 
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import package::common::{fullscreen_triangle_xy, fullscreen_uv_from_clip};
// Box-downsamples one mip of an equirectangular environment map into the next,
// used to build the mip chain that the rasterizer's image-based lighting samples
// (coarser mips approximate rougher pre-filtered reflections / irradiance).

@group(0) @binding(0) var src: texture_2d<f32>;
@group(0) @binding(1) var samp: sampler;

struct VsOut {
    @builtin(position) pos: vec4<f32>,
    @location(0) uv: vec2<f32>,
};

@vertex
fn vs_main(@builtin(vertex_index) vid: u32) -> VsOut {
    let xy = fullscreen_triangle_xy(vid);
    var out: VsOut;
    out.pos = vec4<f32>(xy, 0.0, 1.0);
    out.uv = fullscreen_uv_from_clip(xy);
    return out;
}

@fragment
fn fs_main(in: VsOut) -> @location(0) vec4<f32> {
    // Bilinear sample at mip 0 of the bound (previous-mip) view averages a 2x2
    // block of the source into each destination texel.
    return textureSampleLevel(src, samp, in.uv, 0.0);
}