From 29bc7dd6ffcefad615ea92d0910aeebd9232f59f Mon Sep 17 00:00:00 2001
From: polyfloyd <floyd@polyfloyd.net>
Date: Sat, 19 May 2018 15:33:36 +0200
Subject: [PATCH] Add polar3b.glsl

---
 polar3b.glsl | 13 +++++++++++++
 1 file changed, 13 insertions(+)
 create mode 100644 polar3b.glsl

diff --git a/polar3b.glsl b/polar3b.glsl
new file mode 100644
index 0000000..bfd4900
--- /dev/null
+++ b/polar3b.glsl
@@ -0,0 +1,13 @@
+// variant of https://shadertoy.com/view/lt2Bzd
+
+void mainImage(out vec4 O, in vec2 u) {
+    vec2 U = u+u - iResolution.xy;
+    float T = 6.2832;
+    float l = length(U) / 30.;
+    float L = ceil(l) * 6.;
+    float a = atan(U.x,U.y) - iTime * 2.*(fract(1e4*sin(L))-.5);
+    O = .6 + .4* cos( floor(fract(a/T)*L) + vec4(0,23,21,0) )
+        - max(0., 9.* max( cos(T*l), cos(a*L) ) - 8. );
+}
+
+// https://www.shadertoy.com/view/XtjfDy