api8/shaders/manif.fs

#version 330

in vec4 pos_model;
in vec3 vec_normal;

out vec4 fragColor;

uniform vec4 couleur;
uniform vec4 lumpos;

void main() {
  vec3 torche = normalize(pos_model.xyz - lumpos.xyz);
  float intensite_eclairage = clamp(dot(vec_normal, -torche), 0, 1);
  fragColor = intensite_eclairage * couleur;
}