#version 430

layout(location=0) in vec3 coord3d;
layout(location=1) in vec3 v_normal;
layout(location=2) in vec3 v_color;

out vec3 f_color;

uniform mat4 mvp;
uniform vec4 LightLocation;

uniform vec3 Kd;
uniform vec3 Ld;

uniform vec3 Ka;
uniform vec3 La;

uniform vec3 Ks;
uniform vec3 Ls;


uniform mat3 NormalMatrix;
uniform mat4 ModelViewMatrix;


void main(void)
{
	vec3 fNormal = normalize(NormalMatrix * v_normal);
	vec4 pos = ModelViewMatrix * vec4(coord3d, 1.0);

	vec3 L = normalize(LightLocation.xyz - pos.xyz);
	vec3 N = fNormal;
	vec3 V = normalize(-pos.xyz);
	vec3 R = reflect(-L, N);

	vec3 diffuse = Kd * Ld * max(dot(L, N), 0.0);
	vec3 ambient = Ka * La;
	vec3 specular = Ks * Ls * pow(max(dot(R, V), 0.0), 50.0);

	f_color = diffuse + ambient + specular;
	gl_Position = mvp * vec4(coord3d, 1.0f);
}