fixed background

src/viewer/UIMenu.cpp

@@ -44,9 +44,8 @@ namespace ipc::rigid {
 
 
             draw_io();
-            draw_legends();
             if (m_has_scene) {
-
+                draw_legends();
                 if (ImGui::CollapsingHeader(
                         "运行", &player_menu, ImGuiTreeNodeFlags_DefaultOpen)) {
                     draw_simulation_player();

src/viewer/UISimState.cpp

@@ -81,6 +81,9 @@ void UISimState::init(igl::opengl::glfw::Viewer* _viewer)
     datas_.emplace_back("edges", mesh_data);
     datas_.emplace_back("velocity", velocity_data);
     datas_.emplace_back("body-frame", com_data);
+    // Default colors
+
+    viewer->core().background_color << 0.9f, 0.9f, 0.9f, 0.4f;
 
     load(this->inital_scene);
 }