Cleaning, fixed textures bug

assets/shaders/shader.frag

@@ -1,11 +1,22 @@
 #version 140
 
-in vec2 v_tex_coords;
-out vec4 color;
-
 uniform sampler2D tex;
 
+in vec3 v_normal;
+in vec2 v_tex_coords;
+
+out vec4 color;
+
+vec3 ambientLight = vec3(0.3,0.3,0.3);
+vec3 directionnalLight = normalize(vec3(10,5,7));
+vec3 directionnalLightFactor = vec3(0.6,0.6,0.6);
+
 void main() {
-    color = texture(tex, v_tex_coords);
+    vec3 lambertComponent = dot(directionnalLight, v_normal) * directionnalLightFactor;
+    lambertComponent = max(vec3(0.0, 0.0, 0.0), lambertComponent);
+
+    vec4 factor = vec4(ambientLight + lambertComponent, 1.0);
+
+    color = factor * texture(tex, v_tex_coords);
 }
 

assets/shaders/shader.vert

@@ -1,14 +1,18 @@
 #version 140
 
-in vec3 vertex;
-in vec2 tex_coords;
-
 uniform mat4 perspective;
 uniform mat4 view;
 
+in vec3 vertex;
+in vec2 tex_coords;
+in vec3 normal;
+
 out vec2 v_tex_coords;
+out vec3 v_normal;
 
 void main() {
+    v_normal = transpose(inverse(mat3(view))) * normal;
     v_tex_coords = tex_coords;
+
     gl_Position = perspective * view * vec4(vertex, 1.0);
 }