Starting day 19, blending.

19-blending/shaders/08-frag.glsl

@@ -0,0 +1,43 @@
+#version 330 core
+struct Material {
+  vec3 ambient;
+  vec3 diffuse;
+  vec3 specular;
+  float shininess;
+};
+
+struct Light {
+  vec3 position;
+  vec3 ambient;
+  vec3 diffuse;
+  vec3 specular;
+};
+
+uniform Light light;
+
+uniform Material material;
+out vec4 FragColor;
+in vec3 FragPos;
+in vec3 Normal;
+
+uniform vec3 viewPos;
+
+void main()
+{
+  vec3 ambient = light.ambient * material.ambient;
+
+  vec3 norm = normalize(Normal);
+  vec3 lightDir = normalize(light.position - FragPos);
+  float diff = max(dot(norm, lightDir), 0.0);
+  vec3 diffuse = light.diffuse * (diff * material.diffuse);
+
+  vec3 viewDir = normalize(viewPos - FragPos);
+  vec3 reflectDir = reflect(-lightDir, norm);
+
+  float spec = pow(max(dot(viewDir, reflectDir), 0.0), material.shininess);
+  vec3 specular = light.specular * (material.specular * spec);
+
+  vec3 result = ambient + diffuse + specular;
+
+  FragColor = vec4(result, 1.0);
+}