Made buildable now

engine/NBGraphics/src/VertexArray.cpp

@@ -141,7 +141,7 @@ std::vector<std::shared_ptr<VertexBuffer<false>>> VertexGroup::buffers() {
 }
 
 size_t VertexGroup::buffers(std::vector<VertexBuffer<false>>&& bufs_) {
-    _vertex_data = {};
+    _vertex_data.clear();
     for (auto& buf : bufs_) {
         _vertex_data.emplace_back(
             std::make_shared<VertexBuffer<false>>(std::move(buf))
@@ -166,13 +166,16 @@ VertexBuffer<false>&& VertexGroup::dropBuffer(size_t idx) {
         THROW(BufferError(BufferError::Codes::INVALID_BUFFER));
     }
     std::vector<VertexBuffer<false>> tmp;
+    std::shared_ptr<VertexBuffer<false>> ret_ptr;
+    size_t i = 0;
     for (auto buf : _vertex_data) {
-        tmp.emplace_back(std::move(*buf));
+        if (i == idx) {
+            ret_ptr = std::make_shared<VertexBuffer<false>>(std::move(tmp[idx]));
+        } else {
+            tmp.emplace_back(std::move(*buf));
+        }
+        i++;
     }
-    _vertex_data.clear();
-    std::shared_ptr<VertexBuffer<false>> ret_ptr = 
-        std::make_shared<VertexBuffer<false>>(std::move(tmp[idx]));
-    tmp.erase(tmp.begin()+idx);
     buffers(std::move(tmp));
     return std::move(*ret_ptr);
 }