1 files changed, 62 insertions, 0 deletions
diff --git a/advanced_lighting/blinn_phong/shaders/blinn_phong.fs b/advanced_lighting/blinn_phong/shaders/blinn_phong.fs
new file mode 100644
index 0000000..23e2968
--- /dev/null
+++ b/advanced_lighting/blinn_phong/shaders/blinn_phong.fs
@@ -0,0 +1,62 @@
+#version 330 core
+
+in vec2 tex_coords;
+in vec3 normal;
+in vec3 frag_pos;
+
+out vec4 frag_color;
+
+uniform sampler2D texture_diffuse;
+uniform sampler2D texture_specular;
+
+uniform vec3 light_pos;
+uniform vec3 view_pos;
+
+uniform float ambient_strength;
+uniform float specular_strength;
+uniform float shininess;
+
+vec4
+spotlight(vec3 light_dir, vec3 view_dir)
+{
+    vec3 tex_color_diff = texture(texture_diffuse, tex_coords);
+    float ambient_strength = 0.1f;
+    vec4 ambient = tex_color_diff*ambient_strength;
+    vec4 diffuse = tex_color_diff*dot(-light_dir, )
+    return(color);
+}
+
+vec4
+blinn_phong()
+{
+    // Sample the diffuse color from the texture
+    vec3 diffuse_color = texture(texture_diffuse, tex_coords).rgb;
+
+    // Sample the specular color from the texture (if available)
+    vec3 specular_color = texture(texture_specular, tex_coords).rgb;
+
+    // Ambient lighting
+    vec3 ambient = ambient_strength*diffuse_color;
+
+    // Diffuse lighting
+    vec3 norm = normalize(normal);
+    vec3 light_dir = normalize(light_pos-frag_pos);
+    float diff = max(dot(norm, light_dir), 0.0);
+    vec3 diffuse = diff * diffuse_color;
+
+    // Specular lighting
+    vec3 view_dir = normalize(view_pos-frag_pos);
+    vec3 halfway_dir = normalize(light_dir+view_dir); // Halfway vector
+    float spec = pow(max(dot(norm, halfway_dir), 0.0), shininess);
+    vec3 specular = specular_strength*spec*specular_color;
+
+    // Combine all components
+    vec3 result = (ambient+diffuse+specular);
+    return((result, 1.0));
+}
+
+void
+main(void)
+{
+    frag_color = blinn_phong();
+}