start of second test generator. revealed issue with neighbor linkage overwriting

src/main.rs

@@ -223,7 +223,8 @@ impl App {
         image::create_texture_image_view(&device, &mut data)?;
         image::create_texture_sampler(&device, &mut data)?;
         
-        generators::generate_test_scene(&mut scene_handler, &mut data)?;
+        let cur_pos = generators::generate_test_scene(&mut scene_handler, &mut data)?;
+        //let cur_pos = generators::generate_test_scene2(&mut scene_handler, &mut data, 1, 1,1, 1)?;
         scene_handler.prepare_data(&instance, &device, &mut data)?;
 
         buffer::create_uniform_buffers(&instance, &device, &mut data)?;
@@ -239,7 +240,7 @@ impl App {
             cam_angle_x: 0.0, cam_angle_y: 0.0, 
             last_pos: LogicalPosition::new(-1 as f32, -1 as f32), 
             view_direction: vertex::Vec3::new(0.0, 0.0, 0.0),
-            cur_pos: cgmath::point3(5.0, 5.0, 10.0),
+            cur_pos: cur_pos,
             scene_handler,
             show_frame_rate: false,
             synchronized: 0