Completed main levels to progress to text-rendering and 2d development.

- Only lessons left are geometry shaders and anti-aliasing
- will get to those later on soon
- need to do text rendering now

1 files changed, 15 insertions, 0 deletions

diff --git a/source/lessons/instanced_rendering/planetary models/shaders/refr.fs.glsl b/source/lessons/instanced_rendering/planetary models/shaders/refr.fs.glsl
new file mode 100644
index 0000000..6747ded
--- /dev/null
+++ b/source/lessons/instanced_rendering/planetary models/shaders/refr.fs.glsl
@@ -0,0 +1,15 @@
+#version 330 core
+
+in vec3 Normal;
+in vec3 Position;
+
+uniform samplerCube skybox;
+uniform vec3 cameraPos;
+out vec4 FragColor;
+
+void main() {
+  float refr_ratio = 1.0/1.52;
+  vec3 I = normalize(Position - cameraPos);
+  vec3 R = refract(I, normalize(Normal), refr_ratio); 
+  FragColor = vec4(texture(skybox, R).rgb, 1.0);
+};