From 07eaf69b2c5a70d6495fa5dbd29d4f842fec7b00 Mon Sep 17 00:00:00 2001
From: polyfloyd <floyd@polyfloyd.net>
Date: Sat, 19 May 2018 15:55:59 +0200
Subject: [PATCH] Add trippy-waves.glsl

---
 trippy-waves.glsl | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)
 create mode 100644 trippy-waves.glsl

diff --git a/trippy-waves.glsl b/trippy-waves.glsl
new file mode 100644
index 0000000..adca4ef
--- /dev/null
+++ b/trippy-waves.glsl
@@ -0,0 +1,36 @@
+mat2 rotate(float angle)
+{
+	float c = cos(angle);
+	float s = sin(angle);
+	return mat2(c, -s, s, c);
+}
+
+void mainImage( out vec4 fragColor, in vec2 fragCoord )
+{
+	vec2 uv = (2 * fragCoord.xy - iResolution.xy) / max(iResolution.x, iResolution.y);
+
+	vec4 result = vec4(0,0,0,1);
+
+	float t = 1.;
+	float offset = -5. * iTime;
+	float base = 80. * length(uv);
+
+	float d = sin(-iTime * 2 + 15. * length(uv));
+	d *= d * d;
+
+	mat2 rot = rotate(5. * length(uv));
+	uv = abs(rot * uv);
+
+	for (int p = 0; p < 3; p++)
+	{
+		result[p] = sin(offset + t * base) - cos(20. * uv.x) - cos(20. * uv.y);
+		t += 0.05;
+	}
+
+	result.xyz *= result.xyz;
+	result.xyz = 1. - result.xyz;
+
+	fragColor = result * d;
+}
+
+// https://www.shadertoy.com/view/Xt2BDG