glitch effect from hatom

glitch.glsl

vec3 addGlitchEffect(vec3 render, vec2 uv, vec4 mouseFluid) {
        vec2 st = uv;
        vec2 offset = vec2(0.);
        float strength = uFluidStrength*0.7-uLetterBox*0.3;
        addFisheyeEffect(st, strength*0.5);
        vec2 glitchUv = st*vec2(3., 6.)-uTime*0.01;
        glitchUv = floor(glitchUv*15.)/15.;
        glitchUv *= vec2(0.08, 0.1);
        vec2 glitchUv2 = st*vec2(2., 5.)+uTime*0.03;
        glitchUv2 = floor(glitchUv2*vec2(10., 15.))/vec2(10., 15.);
        glitchUv2 *= vec2(0.1, 0.13);
        vec3 noise = texture2D(tNoise3, glitchUv).rgb;
        vec3 noise2 = texture2D(tNoise3, glitchUv2).rgb;
        noise = mix(noise, noise2, step(sin(noise.b*20.), 0.3));
        float b = mix(20., 40., noise.g);
        float a = floor(noise.r*b)/b;
        offset.x = a-0.5;
        vec3 firstColor = texture2D(tDiffuse, st).rgb;
        vec3 hsv = rgb2hsv(firstColor);
        float t = step(0.4, sin(hsv.b*10.));
        t += step(hsv.g, 0.35)+smoothstep(0.6, 0.7, length(uv-0.5+sin(noise.bg*10.-strength)*0.4));
        float m = length(floor(((uv-0.5)*vec2(0.7, 2.)+(noise.rg-0.5)*3.)*vec2(11., 30.))/vec2(11., 30.)+sin(uTime+noise2.rg-0.5)*(noise.gb-0.5)*0.5);
        t *= step(mix(1.2, 1.1, strength), m);
        t += step((sin(noise2.r*10.+uTime*mix(1.5, -1.5, step(noise2.g, 0.5)))+1.)*2., mix(0., 0.1, step(m, 0.2)));
        t *= strength;
        t += mouseFluid.b*0.03*uLetterBox;
        t += smoothstep(0.7, 0.8, length(uv-0.5+sin(noise.bg*20.-uTime)*0.3))*mix(0.1, 1., step(hsv.g, mix(0.35, 0.3, sin(uTime*4.))))*uLetterBox;
        vec3 color;
        color.r = texture2D(tDiffuse, st+offset*t*0.98+0.001*strength).r;
        color.g = texture2D(tDiffuse, st+offset*t*1.).g;
        color.b = texture2D(tDiffuse, st+offset*t*1.02-0.001*strength).b;
        vec3 colorDiff = vec3(color-firstColor);
        t *= length(step(vec3(0.01), abs(colorDiff)));
        color = pow(color, vec3(mix(1., 1.2, uLetterBox)))*mix(1., 3., uLetterBox);
        vec3 luma = vec3(0.299, 0.587, 0.114);
        float v = dot(color, luma);
        vec3 glitchColor = color;
        #ifdef FOCUS_NUM
            #if FOCUS_NUM == 1
                #elif FOCUS_NUM == 2
                vec3 color1 = vec3(0.757, 1., 0.071);
                vec3 color2 = vec3(0.0);
                glitchColor = mix(color1, color2, step(v, 0.5));
                #elif FOCUS_NUM == 3
                glitchColor = 1.-rgb2hsv(normalize(color));
                #elif FOCUS_NUM == 4
                #elif FOCUS_NUM == 5
                glitchColor = vec3(rgb2hsv(glitchColor).g);
            #endif
        #endif
        color = mix(color, glitchColor, uLetterBox);
        color = mix(render, color, t*uFluidStrength);
        return color;
    }