Commit of work up to day 11 of learnopengl.com.

09-basic-light-materials/shaders/08-frag.glsl

@@ -0,0 +1,32 @@
+#version 330 core
+
+out vec4 FragColor;
+in vec3 FragPos;
+in vec3 Normal;
+
+uniform vec3 objectColor;
+uniform vec3 lightColor;
+uniform vec3 lightPos;
+uniform vec3 viewPos;
+
+void main()
+{
+  float ambientStrength = 0.1;
+  float specularStrength = 0.5;
+  vec3 ambient = ambientStrength * lightColor;
+
+  vec3 norm = normalize(Normal);
+  vec3 lightDir = normalize(lightPos - FragPos);
+  float diff = max(dot(norm, lightDir), 0.0);
+  vec3 diffuse = diff * lightColor;
+
+  vec3 viewDir = normalize(viewPos - FragPos);
+  vec3 reflectDir = reflect(-lightDir, norm);
+
+  float spec = pow(max(dot(viewDir, reflectDir), 0.0), 32);
+  vec3 specular = specularStrength * spec * lightColor;
+
+  vec3 result = (ambient + diffuse + specular) * objectColor;
+
+  FragColor = vec4(result, 1.0);
+}