+GuiEdge, a line between two slots

src/gui/node_editor.h

@@ -49,6 +49,18 @@ public:
     Rect bbox;
 };
 
+class GuiEdge {
+public:
+    GuiEdge(GuiNode *lhs, GuiNode *rhs, uint fromSlot, uint toSlot)
+        : lhs(lhs), rhs(rhs), fromSlot(fromSlot), toSlot(toSlot) {}
+
+
+    GuiNode *lhs;
+    GuiNode *rhs;
+    uint fromSlot;
+    uint toSlot;
+};
+
 class NodeEditor {
 public:
     NodeEditor() {