#version 330

layout(location = 0) in vec3 pos;
layout(location = 1) in vec3 normal;

out float intensite_eclairage;
uniform mat4 proj, model, view;
uniform vec4 lumpos;

void main() {
  vec4 pos_model = model * vec4(pos, 1);
  // vec3 soleil = normalize(vec3(0, -20, 0));
  vec3 torche = normalize(pos_model.xyz - lumpos.xyz);
  vec3 vec_normal = normalize(transpose(inverse(model)) * vec4(normal, 0)).xyz;

  intensite_eclairage = clamp(dot(vec_normal, -(torche)), 0, 1);
  gl_Position = proj * view * pos_model;
}