Picking Visualization fix (still buggy)

glow-extras @ e904896a

-Subproject commit a6d17933b2b8093098386f07596c3a8cc079c406
+Subproject commit e904896aaca745dbedc2b9d2baa19eee971f6fcb

samples/basic/viewer/main.cc

@@ -116,6 +116,7 @@ void simple_picking(pm::vertex_attribute<tg::pos3> const& pos, pm::face_attribut
         gv::view(pos, col, gv::pick().on_left_click([&](uint32_t face_id, tg::pos3 world_pos, tg::vec3 normal) {
             std::cout << "Something has been picked! ON_LEFT_CLICK"
                       << "ID: " << face_id << std::endl;
+            std::cout << "World_Position" << world_pos << std::endl;
             return;
         }));
     }
@@ -138,6 +139,17 @@ void simple_picking(pm::vertex_attribute<tg::pos3> const& pos, pm::face_attribut
         }));
     }
 
+	{ //DOES NOT WORK RIGHT NOW - NEEDS TO BE FIXED
+        // Access of according face_indices while picking. Enable mesh access. WARNING: Does only work when Picking IDs are automatically generated and NOT user-defined
+        gv::view(pos, col, gv::pick().on_left_click([&](pm::face_index id, tg::pos3 world_pos, tg::vec3 normal) {
+           // std::cout << "Something has been picked! ON_LEFT_CLICK"
+            //          << "Face_index achieved" << id.value << std::endl;
+            // Mesh access at this point?
+            Picking_result r;
+            return r;
+        }));
+    }
+
     {
         // On_hover, on_right_click, and on_left_click callbacks defined simultaneously
         gv::view(pos, col,