From c755da334b1194a4b0c5f18442e23ff0ab04b4b9 Mon Sep 17 00:00:00 2001
From: Dimitri Lozeve <dimitri@lozeve.com>
Date: Sun, 7 Mar 2021 18:28:32 +0100
Subject: [PATCH] Add resources and references

---
 README.md          | 13 +++++++++++++
 shaders/julia.frag |  6 +++---
 2 files changed, 16 insertions(+), 3 deletions(-)

diff --git a/README.md b/README.md
index 174919a..dc4795b 100644
--- a/README.md
+++ b/README.md
@@ -84,3 +84,16 @@ in a texture in another framebuffer) does not work properly. I don't
 understand exactly what's broken, but maybe I'll investigate it more
 closely later. If you have any idea about what went wrong, don't
 hesitate to notify me!
+
+## References and other resources
+
+- [LearnOpenGL](https://learnopengl.com/)
+- [open.gl](https://open.gl/)
+- [docs.gl](http://docs.gl/)
+- [The Book of Shaders](https://thebookofshaders.com/)
+- [glslViewer](https://github.com/patriciogonzalezvivo/glslViewer), a
+  much more complete project with similar aims
+- [Shadertoy](https://www.shadertoy.com/)
+- [smoothstep.io](https://smoothstep.io/)
+- [webgl-noise](https://github.com/stegu/webgl-noise/), a collection
+  of reference implementations of noise functions, for use in shaders
diff --git a/shaders/julia.frag b/shaders/julia.frag
index 8b2a8b9..35321cd 100644
--- a/shaders/julia.frag
+++ b/shaders/julia.frag
@@ -49,11 +49,11 @@ float pi = 2.0 * asin(1.0);
 
 void main() {
   // Changes with time
-  // float a = 2.0 * pi * (int(u_frame) % 500) / 500.0;
-  // vec2 c = 0.7885 * vec2(cos(a), sin(a));
+  float a = 2.0 * pi * (int(u_frame) % 500) / 500.0;
+  vec2 c = 0.7885 * vec2(cos(a), sin(a));
 
   // Changes with cursor position
-  vec2 c = u_mouse.xy / u_resolution.xy * 2.0 - vec2(1.0, 1.0);
+  // vec2 c = u_mouse.xy / u_resolution.xy * 2.0 - vec2(1.0, 1.0);
 
   vec2 z = gl_FragCoord.xy / u_resolution.xy * 3.0 - vec2(1.5, 1.5);
   int i = 0;