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shawnlawson/exp.frag

Created September 14, 2017 12:26
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Revisions

  1. Shawn Lawson created this gist Sep 14, 2017.
    21 changes: 21 additions & 0 deletions exp.frag
    View file
    Original file line number Diff line number Diff line change
    @@ -0,0 +1,21 @@

    void main() {

    vec2 st = st()+vec2(bands.y-bands.x + sin(time* 5.), bands.y - bands.z- sin(time))*.5, stN = stN(); vec3 c = black;
    st *= noise(st+time);
    float theta = atan(st.x, st.y) / PI2; float phi = log(length(st));
    float k = 2.; float a = mod(theta, PI2/k); a = abs(a - PI2/k/2.) * 2.;

    float f = vrmf(vec2(phi * .5 + time - bands.z * 2., a) * vec2(.25 + bands.x * 1.), int(1. + bands.y * 2.));
    c = f * hsv2rgb(vec3(time * .1 - bands.x, .8, .5)) * 6.;
    c = step(.9 * hsv2rgb(vec3(time * .35, .9, .9)), c);

    c += step(.9, mod(time * 3., 9.)) * white * .15 * bands.x;

    vec3 bb = texture2D(backbuffer, stN).rgb;

    c = mix(c * ., -bb, .9);
    gl_FragColor=vec4(c, 1.0 );
    }