cvkg-render-gpu 0.2.8

Cyber Viking Kvasir Graph (CVKG) - High-fidelity agentic UI framework
Documentation 
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// shapes.wgsl — fragment dispatch for the main pipeline.
// Material functions are auto-generated by build.rs into materials_generated.wgsl.
// vs_main is in common.wgsl (shared by all pipelines).



@fragment
fn fs_main(in: VertexOutput) -> @location(0) vec4<f32> {
    var color = in.color;
    let fw = length(vec2(dpdx(in.logical.x), dpdy(in.logical.y)));

    // ── High-Fidelity SDF Clipping ───────────────────────────────────────
    let p_clip_pos = in.clip.xy * scene.scale_factor;
    let p_clip_size = in.clip.zw * scene.scale_factor;
    let pixel_pos = (in.clip_position.xy * 0.5 + 0.5) * scene.resolution * scene.scale_factor;

    let clip_d = sd_box(pixel_pos - (p_clip_pos + p_clip_size * 0.5), p_clip_size * 0.5);
    var clip_alpha = 1.0 - smoothstep(-1.0, 1.0, clip_d);

    if (in.clip.z > 15000.0) { clip_alpha = 1.0; }
    color.a *= clip_alpha;

    // Geometric Slice (Mjolnir Slice)
    if (in.slice.z > 0.5) {
        let angle_rad = in.slice.x * 0.01745329251;
        let normal_dir = vec2<f32>(cos(angle_rad), sin(angle_rad));
        let dist = dot(in.world_pos, normal_dir) - in.slice.y;
        if (dist > 0.0) { discard; }
    }

    // ── Material Dispatch ────────────────────────────────────────────────
    // Calls the appropriate material function based on material_id.
    // Material functions are auto-generated from MaterialGraph definitions.
    color = dispatch_material(in.material_id, in, color);

    // ── Berserker Rage Effect (applied to all materials) ─────────────────
    let rage = scene.berzerker_rage;
    if rage > 0.05 {
        let noise_coord = in.logical * 0.05 + vec2(scene.time * 0.5);
        let n = fbm(noise_coord);
        let pulse = 0.5 + 0.5 * sin(scene.time * 10.0 * rage);
        let rage_color = mix(theme.ember_core, theme.shatter_neon, pulse * 0.3);
        color = mix(color, rage_color, n * rage * 0.7);
        if rage > 0.8 {
            color.r *= 1.1;
            color.b *= 0.9;
        }
    }

    if color.a <= 0.0 { discard; }
    return color;
}