#version 150

flat in vec3 normal;

in vec4 eyePos;

in vec4 primaryColor;

uniform vec3 lightPos;

uniform vec3 lightColor;

out vec4 fragColor;

void main()

{

    vec3 view = normalize(-eyePos.xyz);

    vec3 L = normalize(lightPos-eyePos.xyz);

    float attenuation = max(0.0, dot(L, normal));

    vec3 reflectvec = normalize(reflect(-L, normal));

    float spec = max(dot(reflectvec, view),0.0);

    fragColor = primaryColor + vec4(min(pow(spec, 32.0)+attenuation*lightColor, 1.0), 1);

}