#version 300 es
#extension all : warn

#pragma STDGL
#pragma optimize(on)
#pragma debug(on)

/* Uniform */
uniform vec3 lightPos;
uniform vec4 diffuse;
uniform vec4 specular;
 
/* In */ 
varying vec3 normal;

/* Main */
void main () 
{
   	// Compute dot product of light direction and normal vector
   	float dotProd = max(dot(lightPos, normalize(normal)), 0.0);
   	// Compute diffuse and specular contributions
   	gl_FragColor = diffuse * dotProd + specular * pow(dotProd, 20.0);
};