From ab2204c233c97079dc5fcc14216d4606b1f7253f Mon Sep 17 00:00:00 2001
From: Patricio Gonzalez Vivo <patriciogonzalezvivo@gmail.com>
Date: Sun, 27 Sep 2015 23:16:32 +0000
Subject: [PATCH] editing on RPI

---
 11/tmp/vortex.frag | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/11/tmp/vortex.frag b/11/tmp/vortex.frag
index cfc6823..e2f2550 100644
--- a/11/tmp/vortex.frag
+++ b/11/tmp/vortex.frag
@@ -73,6 +73,11 @@ float cascade(vec2 st, vec2 zoom, float time, float warp) {
 
 void main() {
     vec2 st = gl_FragCoord.xy/u_resolution.xy;
+    if (u_resolution.x>u_resolution.y) {
+        st.x *= u_resolution.x/u_resolution.y;
+    } else {
+        st.y *= u_resolution.y/u_resolution.x;
+    }
     vec3 color = vec3(0.0);
     vec2 pos = st-vec2(.5);
     float r = dot(pos,pos);
@@ -86,4 +91,4 @@ void main() {
     color *= 1.0-smoothstep(.11,.13,r);
 
     gl_FragColor = vec4(color,1.0);
-}
\ No newline at end of file
+}