Rough first draft of maze game in c++

fragmentshader.txt

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+#version 460 core
+out vec4 FragColor;
+
+in vec3 Normal;
+in vec3 FragPos;
+
+uniform vec3 viewPos;
+uniform vec3 lightColor;
+uniform vec3 objectColor;
+
+void main()
+{
+    // ambient
+    float ambientStrength = 0.1;
+    vec3 ambient = ambientStrength * lightColor;
+
+    vec3 vecDist = viewPos - FragPos;
+    vec3 normDist = normalize(vecDist);
+
+    // diffuse
+    vec3 norm = normalize(Normal);
+    vec3 lightDir = normDist;
+    float diff = max(dot(norm, lightDir), 0.0);
+    vec3 diffuse = diff * lightColor;
+
+    // specular
+    float specularStrength = 0.5;
+    vec3 viewDir = normDist;
+    vec3 reflectDir = reflect(-lightDir, norm);
+    float spec = pow(max(dot(viewDir, reflectDir), 0.0), 32);
+    vec3 specular = specularStrength * spec * lightColor;
+
+    float dist = distance(viewPos, FragPos);
+    float att = 1.0 / (1.0 + 0.1*dist + 0.01*dist*dist);
+
+    vec3 result = (ambient + diffuse + specular) * att * objectColor;
+    FragColor = vec4(result, 1.0);
+}