add visualization (#17)

shaders/markmwangi/something.frag

@@ -0,0 +1,35 @@
+// Ether by nimitz 2014 (twitter: @stormoid)
+// https://www.shadertoy.com/view/MsjSW3
+// License Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported License
+// Contact the author for other licensing options
+
+#define TIME iTime * 2.
+mat2 m(float a){float c=cos(a), s=sin(a);return mat2(c,-s,s,c);}
+
+uniform float knob_77;
+#define KNOB_A knob_77
+
+#define PROBE_B bass * 3.
+#define PROBE_C treble * 2.
+
+float map(vec3 p){
+    p.xz*= m(.9);p.xy*= m(energy / 5.);
+    vec3 q = p*2.;
+    return length(p+vec3(tan(-1.535)))*log(length(p)-1.) + sin(q.x+sin(q.z+sin(1.)))*PROBE_C - .01;
+}
+
+void mainImage( out vec4 fragColor, in vec2 fragCoord ){	
+	vec2 position = fragCoord.xy/iResolution.y - vec2(PROBE_C * (.1 * PROBE_C) / 100. + .45, energy / 25. +.55);
+
+    vec3 cl = vec3(energy  * 8.0);
+    float d = 4.5;
+    for(int i=0; i<=5; i++)	{
+		vec3 p = vec3(0.,0.,6.) + normalize(vec3(position, -.7))*d;
+        float rz = map(p);
+		float f =  clamp((rz - map(p+.1))*-1.535 , -.1, PROBE_B );
+        vec3 l = vec3(PROBE_B * .01,0.3,.4) + vec3(5., 2.5, 3.)*f;
+        cl = cl*l + smoothstep(-50., -1.0, rz)*1.7 * l;
+		d += min(rz, .8);
+	}
+    fragColor = vec4(cl, 1.)/ (energy * 85.);
+}