SceneRefract: First cut at a new scene that will demonstrate the refraction of

light through a transparent object.

1 files changed, 24 insertions, 0 deletions

diff --git a/data/shaders/light-refract.frag b/data/shaders/light-refract.frag
new file mode 100644
index 0000000..f7ae395
--- /dev/null
+++ b/data/shaders/light-refract.frag
@@ -0,0 +1,24 @@
+uniform sampler2D DistanceMap;
+
+varying vec3 vertex_normal;
+varying vec4 vertex_position;
+
+void main()
+{
+    const vec4 lightAmbient = vec4(0.1, 0.1, 0.1, 1.0);
+    const vec4 lightSpecular = vec4(0.8, 0.8, 0.8, 1.0);
+    const vec4 matAmbient = vec4(0.2, 0.2, 0.2, 1.0);
+    const vec4 matSpecular = vec4(1.0, 1.0, 1.0, 1.0);
+    const float matShininess = 100.0;
+    vec3 eye_direction = normalize(-vertex_position.xyz);
+    vec3 light_direction = normalize(LightSourcePosition.xyz/LightSourcePosition.w -
+                                     vertex_position.xyz/vertex_position.w);
+    vec3 normalized_normal = normalize(vertex_normal);
+    vec3 reflection = reflect(-light_direction, normalized_normal);
+    float specularTerm = pow(max(0.0, dot(reflection, eye_direction)), matShininess);
+    float diffuseTerm = max(0.0, dot(normalized_normal, light_direction));
+    vec4 specular = (lightSpecular * matSpecular);
+    vec4 ambient = (lightAmbient * matAmbient);
+    vec4 diffuse = (LightColor * MaterialDiffuse);
+    gl_FragColor = (specular * specularTerm) + ambient + (diffuse * diffuseTerm);
+}