Add a sea shaded cubes, just because. No big deal (yet).

[mandelwow.git] / shaded.vert

diff --git a/shaded.vert b/shaded.vert
new file mode 100644 (file)
index 0000000..4f3035c
--- /dev/null
+++ b/shaded.vert
@@ -0,0 +1,22 @@
+#version 300 es
+precision lowp float;
+
+in vec3 position;
+in vec3 normal;
+out vec4 color;
+
+uniform mat4 perspective;
+uniform mat4 view;
+uniform mat4 model;
+
+void main() {
+    mat4 modelview = view * model;
+    mat4 m = perspective * modelview;
+    vec3 dark = vec3(0.0, 0.0, 0.1);
+    vec3 bright = vec3(0.0, 0.0, 0.9);
+    vec3 u_light = vec3(-0.5, -0.5, -1.);
+    vec3 v_normal = transpose(inverse(mat3(model))) * normal;
+    float brightness = max(dot(normalize(v_normal), normalize(u_light)), 0.0);
+    color = vec4(mix(dark, bright, brightness), 1.0);
+    gl_Position = m * vec4(position, 1.0);
+}