feat: lightning now working

Lighting.java

@@ -80,14 +80,14 @@ public class Lighting {
                         h.add(l);
                         h.normalize();
 
-                        /* diffuse contribution : A COMPLETER */
+                        /* diffuse contribution */
                         double Id = light.params[3];
-                        double Id = kd *Id* Math.cos(normal,l);
+                        double I_diff = Id * kd * Math.cos(normal.dot(l));
 
-                        /* specular contribution : A COMPLETER */
+                        /* specular contribution */
-                        double Is = ks * Id * Math.cos(h,normal)^2;
+                        double I_spec = Id * ks * Math.cos(h.dot(normal));
 
-                        I += Id + Is;
+                        I += I_diff + I_spec;
                     } catch (InstantiationException ex) {
                         /* should not reach */ } catch (SizeMismatchException ex) {
                         /* should not reach */ }

Mesh.java

@@ -120,9 +120,13 @@ public class Mesh {
         try {
             for (int i = 0; i < 3 * getNumFaces(); i += 3) {
 
-                Vector v0 = vertices[i + 0];
+                int index_v0 = faces[i + 0];
-                Vector v1 = vertices[i + 1];
+                int index_v1 = faces[i + 1];
-                Vector v2 = vertices[i + 2];
+                int index_v2 = faces[i + 2];
+
+                Vector3 v0 = new Vector3(vertices[index_v0]);
+                Vector3 v1 = new Vector3(vertices[index_v1]);
+                Vector3 v2 = new Vector3(vertices[index_v2]);
 
                 Vector3 bidule_gauche = new Vector3(v1);
                 bidule_gauche.subtract(v0);

Renderer.java

@@ -156,17 +156,13 @@ public class Renderer {
         screen.swapBuffers();
         wait(1);
 
-        wait(10);
-
         /* solid rendering, with lighting */
-        /*
+        screen.clearBuffer();
-         * screen.clearBuffer ();
+        shader.reset();
-         * shader.reset ();
+        setLightingEnabled(true);
-         * setLightingEnabled (true);
+        renderSolid();
-         * renderSolid ();
+        screen.swapBuffers();
-         * screen.swapBuffers ();
+        wait(1);
-         * wait (3);
-         */
 
         /* solid rendering, with texture */
         /*
@@ -178,9 +174,10 @@ public class Renderer {
          * setLightingEnabled (true);
          * renderSolid ();
          * screen.swapBuffers ();
-         * wait (3);
+         * wait (1);
          */
 
+        wait(5);
         screen.destroy();
         System.exit(0);
     }