1 files changed, 18 insertions, 0 deletions
diff --git a/skybox/shaders/refraction.fs b/skybox/shaders/refraction.fs
new file mode 100644
index 0000000..8a8a8c5
--- /dev/null
+++ b/skybox/shaders/refraction.fs
@@ -0,0 +1,18 @@
+#version 330 core
+
+in vec3 pos;
+in vec3 normal;
+
+out vec4 frag_color;
+
+uniform vec3 camera_pos;
+uniform samplerCube skybox;
+
+void
+main(void)
+{
+    float ratio = 1.0f/1.52f;
+    vec3 i = pos-camera_pos;
+    vec3 r = refract(i, normalize(normal), ratio);
+    frag_color = texture(skybox, r);
+}