silly connection of edges

CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.25)
-project(graphs VERSION 0.1.8)
+project(graphs VERSION 0.1.9)
 
 option(ENABLE_ADDRSAN "Enable the address sanitizer" OFF)
 option(ENABLE_UBSAN "Enable the ub sanitizer" OFF)

include/graph.h

@@ -46,7 +46,9 @@ struct bounding_box
 class graph_t
 {
         friend struct loader_t;
+        
         friend class selector_t;
+    
     private:
         std::vector<node_t> nodes;
         blt::hashmap_t<std::string, blt::u64> names_to_node;
@@ -100,6 +102,18 @@ class graph_t
             edges.insert({n1, n2});
         }
         
+        void disconnect(const blt::u64 n1, const blt::u64 n2)
+        {
+            connected_nodes[n1].erase(n2);
+            connected_nodes[n2].erase(n1);
+            edges.erase({n1, n2});
+        }
+        
+        bool is_connected(const blt::u64 n1, const blt::u64 n2)
+        {
+            return edges.contains({n1, n2});
+        }
+        
         void connect(const edge_t& edge)
         {
             connected_nodes[edge.getFirst()].insert(edge.getSecond());
@@ -188,7 +202,7 @@ class engine_t
         friend struct loader_t;
     private:
         graph_t graph;
-        selector_t selector {graph};
+        selector_t selector{graph};
         
         void draw_gui(const blt::gfx::window_data& data);
     

src/selector.cpp

@@ -115,10 +115,19 @@ void selector_t::process_keyboard(blt::i32 width, blt::i32 height)
     {
         if (blt::gfx::isKeyPressed(GLFW_KEY_C))
         {
-            if (placement)
+            if (primary_selection != -1 && secondary_selection != -1)
-                destroy_node(primary_selection);
+            {
-            else
+                if (graph.is_connected(primary_selection, secondary_selection))
-                create_placement_node(mouse_pos);
+                    graph.disconnect(primary_selection, secondary_selection);
+                else
+                    graph.connect(primary_selection, secondary_selection);
+            } else
+            {
+                if (placement)
+                    destroy_node(primary_selection);
+                else
+                    create_placement_node(mouse_pos);
+            }
         } else if (blt::gfx::isKeyPressed(GLFW_KEY_X))
         {
             if (primary_selection != -1)