animations {
    window-open {
        duration-ms 1000
        curve "ease-out-cubic"
        custom-shader r"
            float hash(vec2 p) {
                return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453);
            }

            float noise(vec2 p) {
                vec2 i = floor(p);
                vec2 f = fract(p);
                f = f * f * (3.0 - 2.0 * f);
                float a = hash(i);
                float b = hash(i + vec2(1.0, 0.0));
                float c = hash(i + vec2(0.0, 1.0));
                float d = hash(i + vec2(1.0, 1.0));
                return mix(mix(a, b, f.x), mix(c, d, f.x), f.y);
            }

            float fbm(vec2 p) {
                float v = 0.0;
                float amp = 0.5;
                for (int i = 0; i < 6; i++) {
                    v += amp * noise(p);
                    p *= 2.0;
                    amp *= 0.5;
                }
                return v;
            }

            float warpedFbm(vec2 p, float t) {
                vec2 q = vec2(fbm(p + vec2(0.0, 0.0)),
                              fbm(p + vec2(5.2, 1.3)));

                vec2 r = vec2(fbm(p + 6.0 * q + vec2(1.7, 9.2) + 0.25 * t),
                              fbm(p + 6.0 * q + vec2(8.3, 2.8) + 0.22 * t));

                vec2 s = vec2(fbm(p + 5.0 * r + vec2(3.1, 7.4) + 0.18 * t),
                              fbm(p + 5.0 * r + vec2(6.7, 0.9) + 0.2 * t));

                return fbm(p + 6.0 * s);
            }

            vec4 open_color(vec3 coords_geo, vec3 size_geo) {
                float p = niri_clamped_progress;
                vec2 uv = coords_geo.xy;
                float seed = niri_random_seed * 100.0;

                float t = p * 12.0 + seed;

                float fluid = warpedFbm(uv * 2.0 + seed, t);

                vec2 center = uv - 0.5;
                float dist = length(center * vec2(1.0, 0.7));

                float appear = (1.0 - dist * 1.2) + (1.0 - fluid) * 0.7;
                float reveal = smoothstep(appear + 0.5, appear - 0.5, (1.0 - p) * 1.8);

                float distort_strength = (1.0 - p) * (1.0 - p) * 0.35;
                vec2 wq = vec2(fbm(uv * 2.0 + vec2(0.0, t * 0.2)),
                               fbm(uv * 2.0 + vec2(5.2, t * 0.2)));
                vec2 wr = vec2(fbm(uv * 2.0 + 4.0 * wq + vec2(1.7, 9.2)),
                               fbm(uv * 2.0 + 4.0 * wq + vec2(8.3, 2.8)));
                vec2 warped_uv = uv + (wr - 0.5) * distort_strength;

                vec3 tex_coords = niri_geo_to_tex * vec3(warped_uv, 1.0);
                vec4 color = texture2D(niri_tex, tex_coords.st);

                return color * reveal;
            }
        "
    }
    window-close{
        duration-ms 1000
        curve "ease-out-cubic"
        custom-shader r"
            float hash(vec2 p) {
                return fract(sin(dot(p, vec2(127.1, 311.7))) * 43758.5453);
            }

            float noise(vec2 p) {
                vec2 i = floor(p);
                vec2 f = fract(p);
                f = f * f * (3.0 - 2.0 * f);
                float a = hash(i);
                float b = hash(i + vec2(1.0, 0.0));
                float c = hash(i + vec2(0.0, 1.0));
                float d = hash(i + vec2(1.0, 1.0));
                return mix(mix(a, b, f.x), mix(c, d, f.x), f.y);
            }

            float fbm(vec2 p) {
                float v = 0.0;
                float amp = 0.5;
                for (int i = 0; i < 6; i++) {
                    v += amp * noise(p);
                    p *= 2.0;
                    amp *= 0.5;
                }
                return v;
            }

            float warpedFbm(vec2 p, float t) {
                vec2 q = vec2(fbm(p + vec2(0.0, 0.0)),
                              fbm(p + vec2(5.2, 1.3)));

                vec2 r = vec2(fbm(p + 6.0 * q + vec2(1.7, 9.2) + 0.25 * t),
                              fbm(p + 6.0 * q + vec2(8.3, 2.8) + 0.22 * t));

                vec2 s = vec2(fbm(p + 5.0 * r + vec2(3.1, 7.4) + 0.18 * t),
                              fbm(p + 5.0 * r + vec2(6.7, 0.9) + 0.2 * t));

                return fbm(p + 6.0 * s);
            }

            vec4 close_color(vec3 coords_geo, vec3 size_geo) {
                float p = niri_clamped_progress;
                vec2 uv = coords_geo.xy;
                float seed = niri_random_seed * 100.0;

                float t = p * 12.0 + seed;

                float fluid = warpedFbm(uv * 2.0 + seed, t);

                vec2 center = uv - 0.5;
                float dist = length(center * vec2(1.0, 0.7));

                float dissolve = (1.0 - dist) * 1.2 + fluid * 0.7;
                float remain = smoothstep(dissolve + 0.5, dissolve - 0.5, p * 1.8);

                float distort_strength = p * p * 0.4;
                vec2 wq = vec2(fbm(uv * 2.0 + vec2(0.0, t * 0.2)),
                               fbm(uv * 2.0 + vec2(5.2, t * 0.2)));
                vec2 wr = vec2(fbm(uv * 2.0 + 4.0 * wq + vec2(1.7, 9.2)),
                               fbm(uv * 2.0 + 4.0 * wq + vec2(8.3, 2.8)));
                vec2 warped_uv = uv + (wr - 0.5) * distort_strength;

                vec3 tex_coords = niri_geo_to_tex * vec3(warped_uv, 1.0);
                vec4 color = texture2D(niri_tex, tex_coords.st);

                float tail = smoothstep(1.0, 0.8, p);
                return color * remain * tail;
            }
        "
    }
}