1 files changed, 0 insertions, 64 deletions
diff --git a/shaders/post/glitch.glsl b/shaders/post/glitch.glsl
deleted file mode 100644
index 8f420d9c..00000000
--- a/shaders/post/glitch.glsl
+++ /dev/null
@@ -1,64 +0,0 @@
-// Glitch: now and then the signal slips. At the default level, every couple
-// of seconds a short
-// burst tears a few horizontal bands sideways and pulls their red and blue
-// apart; the bands are sized in pixels and the burst eases in and out over
-// a fraction of a second, so it reads as one event rather than a flicker,
-// and it looks the same at 60 or 144 Hz because every step is keyed to
-// iTime, not to frames. Between bursts the page is left exactly as it is.
-// A torn band's brightness dips in linear light. It is a Shadertoy file:
-// pardes puts its prefix before it.
-
-// Each at levels 1, 2 and 3 (`Glitch 1`..`Glitch 3`); 2 is the default. A
-// higher level slips more often and harder.
-float period() { return pardesByLevel(4.5, 2.4, 0.55); }      // seconds between bursts, on average
-float burst() { return pardesByLevel(0.2, 0.28, 0.5); }       // seconds a burst lasts
-float stepHz() { return pardesByLevel(20.0, 24.0, 30.0); }    // how often a burst re-tears
-float shiftPx() { return pardesByLevel(8.0, 14.0, 34.0); }
-float splitPx() { return pardesByLevel(1.5, 2.5, 6.0); }
-float dip() { return pardesByLevel(0.08, 0.12, 0.22); }
-float tearFrom() { return pardesByLevel(0.8, 0.72, 0.35); }   // how few bands tear
-
-float hash(vec2 p) {
-    vec3 q = fract(vec3(p.xyx) * 0.1031);
-    q += dot(q, q.yzx + 33.33);
-    return fract((q.x + q.y) * q.z);
-}
-
-vec3 toLinear(vec3 c) {
-    return mix(pow((c + 0.055) / 1.055, vec3(2.4)), c / 12.92, lessThanEqual(c, vec3(0.04045)));
-}
-
-vec3 toSrgb(vec3 c) {
-    c = max(c, vec3(0.0));
-    return mix(1.055 * pow(c, vec3(1.0 / 2.4)) - 0.055, c * 12.92, lessThanEqual(c, vec3(0.0031308)));
-}
-
-void mainImage(out vec4 fragColor, in vec2 fragCoord) {
-    vec2 size = iResolution.xy;
-    vec2 uv = fragCoord / size;
-    // Which burst window this is, when in it the burst starts, and how far
-    // into the burst we are: 0 outside one.
-    float window = floor(iTime / period());
-    float start = window * period() + hash(vec2(window, 7.0)) * (period() - burst());
-    float t = (iTime - start) / burst();
-    float live = step(0.0, t) * step(t, 1.0);
-    float envelope = live * sin(3.14159265 * clamp(t, 0.0, 1.0));
-    if (envelope <= 0.0) {
-        fragColor = texture(iChannel0, uv);
-        return;
-    }
-    // Bands of 6 to 40 px, re-cut at stepHz() during the burst; about one
-    // band in four tears.
-    float tick = floor(iTime * stepHz());
-    float band_px = mix(6.0, 40.0, hash(vec2(tick, 3.0)));
-    float band = floor(fragCoord.y / band_px);
-    float roll = hash(vec2(band, tick));
-    float tear = smoothstep(tearFrom(), tearFrom() + 0.18, roll) * envelope;
-    float shift = (hash(vec2(tick, band + 11.0)) - 0.5) * 2.0 * shiftPx() * tear;
-    vec2 at = vec2(fragCoord.x + shift, fragCoord.y);
-    vec2 split = vec2(splitPx() * tear, 0.0);
-    vec4 center = texture(iChannel0, at / size);
-    vec3 col = vec3(texture(iChannel0, (at + split) / size).r, center.g, texture(iChannel0, (at - split) / size).b);
-    col = toSrgb(toLinear(col) * (1.0 - dip() * tear));
-    fragColor = vec4(col, center.a);
-}