everything works when you palce the light in the right spot

resources/shaders/shader.frag

@@ -29,7 +29,8 @@ void main()
 
     vec3 ambient = ambientStrength * lightColor;
 
-    fragColor = vec4((ambient + diffuse) * objectColor, 1.0);
+    vec3 result = (ambient + diffuse) * objectColor;
+    fragColor = vec4(result, 1.0);
 
 //        vec3 lightDir = LightPos - FragPos;
 //        float distance = length(lightDir);

resources/shaders/shader.vert

@@ -16,7 +16,8 @@ void main()
     // * view * model
     gl_Position = projection * model * vec4(position, 1.0);
     FragPos = vec3(model * vec4(position, 1.0));
-    Normal = normal;
+    Normal = transpose(inverse(mat3(model))) * normal;
     LightPos = lightPos;
+//    Normal = normal;
 }
 

src/main/java/org/xfe/engine/Render.java

@@ -34,7 +34,7 @@ public class Render {
 
 //        System.out.println(projection_matrix.toString());
 
-        Vector3f light_position = new Vector3f(0, 0, -8);
+        Vector3f light_position = new Vector3f(0, 0, 0);
 
         for (Entity entity : world.entities) {
             entity.shader.bind();

src/main/java/org/xfe/engine/files/Obj.java

@@ -4,13 +4,15 @@ import org.apache.commons.lang3.ArrayUtils;
 
 import java.io.File;
 import java.io.FileNotFoundException;
+import java.lang.reflect.Array;
 import java.util.ArrayList;
 import java.util.Scanner;
 
 public class Obj {
     int vertex_count;
 
-    float[] vbo;
+    float[] vertex_vbo;
+    float[] normal_vbo;
     int[] indices;
 
     String file_path;
@@ -26,7 +28,8 @@ public class Obj {
         ArrayList<Float> v = new ArrayList<>();
         ArrayList<Float> vn = new ArrayList<>();
         ArrayList<Integer> i = new ArrayList<>();
-        ArrayList<Float> temp_vbo = new ArrayList<>();
+        ArrayList<Float> temp_v_vbo = new ArrayList<>();
+        ArrayList<Float> temp_n_vbo = new ArrayList<>();
 
         String line;
         String[] face_data_temp;
@@ -73,21 +76,21 @@ public class Obj {
                             boolean vbo_el_found = false;
 
                             // We must look for the vertex//normal pair in the existing VBO buffer
-                            for (int a = 0; a < temp_vbo.size(); a += 6)
+                            for (int a = 0; a < temp_v_vbo.size(); a += 3)
                             {
                                 boolean vertex_found = true;
                                 boolean normal_found = true;
 
                                 // look for vertex
                                 for (int b = 0; b < 3; b++)
-                                    if (temp_vbo.get(a + b) != v.get(vertex_index + b)) {
+                                    if (temp_n_vbo.get(a + b) != v.get(vertex_index + b)) {
                                         vertex_found = false;
                                         break;
                                     }
 
                                 // look for normal
-                                for (int b = 3; b < 6; b++)
-                                    if (temp_vbo.get(a + b) != vn.get(normal_index + b - 3)) {
+                                for (int b = 0; b < 3; b++)
+                                    if (temp_n_vbo.get(a + b) != vn.get(normal_index + b)) {
                                         normal_found = false;
                                         break;
                                     }
@@ -104,14 +107,14 @@ public class Obj {
                             {
                                 // Add vertex
                                 for (int a = 0; a < 3; a++)
-                                    temp_vbo.add(v.get(vertex_index + a));
+                                    temp_v_vbo.add(v.get(vertex_index + a));
 
                                 // Add normal
                                 for (int a = 0; a < 3; a++)
-                                    temp_vbo.add(vn.get(normal_index + a));
+                                    temp_n_vbo.add(vn.get(normal_index + a));
 
                                 // Add new index to indices
-                                i.add((temp_vbo.size() / 6) - 1);
+                                i.add((temp_v_vbo.size() / 3) - 1);
                             }
                         }
 
@@ -121,12 +124,17 @@ public class Obj {
         }
 
         this.indices = ArrayUtils.toPrimitive(i.toArray(Integer[]::new));
-        this.vbo = ArrayUtils.toPrimitive(temp_vbo.toArray(Float[]::new));
-        this.vertex_count = this.vbo.length / 6;
+        this.vertex_vbo = ArrayUtils.toPrimitive(temp_v_vbo.toArray(Float[]::new));
+        this.normal_vbo = ArrayUtils.toPrimitive(temp_n_vbo.toArray(Float[]::new));
+        this.vertex_count = this.vertex_vbo.length / 3;
     }
 
-    public float[] getVbo() {
-        return vbo;
+    public float[] getVertexVbo() {
+        return vertex_vbo;
+    }
+
+    public float[] getNormalVbo() {
+        return normal_vbo;
     }
 
     public int[] getIndices() {

src/main/java/org/xfe/engine/world/Mesh.java

@@ -7,7 +7,6 @@ import org.xfe.engine.files.Obj;
 import java.nio.FloatBuffer;
 import java.nio.IntBuffer;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 
 import static org.lwjgl.opengl.GL11.*;
@@ -21,13 +20,14 @@ public class Mesh {
     public int vao_id;
     public List<Integer> vbo_id_list;
 
-    public float[] vbo_buffer;
+    public float[] vertices;
+    public float[] normals;
     public int[] indices;
 
     public Mesh(float[] vbo_buffer, int[] i) {
         this.vbo_id_list = new ArrayList<>();
 
-        this.vbo_buffer = vbo_buffer;
+        this.vertices = vbo_buffer;
         this.indices = i;
 
         this.init();
@@ -38,7 +38,8 @@ public class Mesh {
         this.vbo_id_list = new ArrayList<>();
         Obj obj = new Obj(obj_file_path);
 
-        this.vbo_buffer = obj.getVbo();
+        this.vertices = obj.getVertexVbo();
+        this.normals = obj.getNormalVbo();
         this.indices = obj.getIndices();
         this.vertex_count = obj.getVertexCount();
 
@@ -48,26 +49,35 @@ public class Mesh {
     }
 
     private void init() {
-        FloatBuffer vertices_buffer = null;
-
         try {
             MemoryStack stack = MemoryStack.stackPush();
 
-            // Bind our vertices into the VBO
-            vertices_buffer = stack.callocFloat(this.vbo_buffer.length);
-
-            // Convert from our object list to the primitive float array
-            vertices_buffer.put(0, this.vbo_buffer);
-
             this.vao_id = glGenVertexArrays();
             glBindVertexArray(this.vao_id);
 
+            // Bind Vertices into a VBO
+            FloatBuffer vertices_buffer = stack.callocFloat(this.vertices.length);
+            vertices_buffer.put(0, this.vertices);
             int vbo_id = glGenBuffers();
+
             vbo_id_list.add(vbo_id);
             glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
             glBufferData(GL_ARRAY_BUFFER, vertices_buffer, GL_STATIC_DRAW);
+
+            // Set Position Attribute
             glEnableVertexAttribArray(0);
             glVertexAttribPointer(0, 3, GL_FLOAT, false, 0, 0);
+
+            // Bind Normals into a VBO
+            FloatBuffer normals_buffer = stack.callocFloat(this.normals.length);
+            normals_buffer.put(0, this.normals);
+            vbo_id = glGenBuffers();
+
+            vbo_id_list.add(vbo_id);
+            glBindBuffer(GL_ARRAY_BUFFER, vbo_id);
+            glBufferData(GL_ARRAY_BUFFER, normals_buffer, GL_STATIC_DRAW);
+
+            // Set Normal Attribute
             glEnableVertexAttribArray(1);
             glVertexAttribPointer(1, 3, GL_FLOAT, false, 0, 0);