update

assets/shaders/phong-solid.fragment.glsl

@@ -3,11 +3,33 @@ out vec4 frag_color;
 
 uniform vec3 light_pos;
 uniform vec3 solid_color;
+uniform vec3 camera;
 
 in vec3 normal;
 in vec3 frag_position;
-
+ 
 void main() {
+    vec3 light_color = vec3(1, 1, 1);
+    vec3 normal_norm = normalize(normal);
+    vec3 light_direction_norm = normalize(light_pos - frag_position);
+
+    float ambient_strength = 0.2;
+    vec3 ambient = ambient_strength * light_color;
+
+    float diffuse_strength = max(dot(normal_norm, light_direction_norm), 0.0);
+    vec3 diffuse = diffuse_strength * light_color;
+
+    float specular_strength = 0.5;
+    vec3 view_direction_norm = normalize(camera - frag_position);
+    vec3 reflect_dir = reflect(-light_direction_norm, normal_norm);
+    float spec = pow(max(dot(view_direction_norm, reflect_dir), 0.0), 32);
+    vec3 specular = specular_strength * spec * light_color;
+
+    vec3 phong = specular + (ambient + diffuse) * solid_color;
+    frag_color = vec4(phong, 1.0);
+}
+
+void main_old() {
     vec3 light_color = vec3(1, 1, 1);
     vec3 light_direction_norm = normalize(light_pos - frag_position);
     vec3 normal_norm = normalize(normal);
@@ -25,6 +47,6 @@ void main() {
     float spec = pow(max(dot(view_direction_norm, reflect_dir), 0.0), 32);
     vec3 specular = specular_strength * spec * light_color;
 
-    vec3 result = specular * (solid_color + 2 * light_color) / 2 + (ambient + diffuse) * solid_color;
+    vec3 result = specular + (ambient + diffuse) * solid_color;
     frag_color = vec4(result, 1.0);
 }