Simplify the immediate mode functions and move node

connection logic to the application level

include/ui.h

@@ -16,6 +16,8 @@
 #define NODE_WIDTH 70
 #define NODE_HEIGHT 20
 
+#define DEFAULT_NOODLE_LENGTH 60
+
 typedef enum ui_elem_type ui_elem_type;
 typedef struct ui_elem ui_elem;
 typedef struct ui_ctx ui_ctx;
@@ -43,19 +45,6 @@ struct ui_elem_colours {
   colour border;
 };
 
-typedef struct ui_noodle_elem ui_noodle_elem;
-struct ui_noodle_elem {
-  line noodle;
-  u64 connected_node;
-};
-
-typedef struct ui_node_elem ui_node_elem;
-struct ui_node_elem {
-  rect rec;
-  ui_noodle_elem *noodles;
-  u64 inputs;
-};
-
 struct ui_ctx {
   u64 count;
   i64 hovered;
@@ -75,7 +64,9 @@ void reset_ui_ctx(ui_ctx *ctx);
 void handle_ui_events(const window *wnd, ui_ctx *ctx, const SDL_Event *event);
 bool ui_button(const window *wnd, ui_ctx *ctx, rect rect,
                ui_elem_colours colours);
-ui_node_elem ui_node(const window *wnd, ui_ctx *ctx, ui_node_elem node,
-                     ui_elem_colours colours);
+bool ui_node(const window *wnd, ui_ctx *ctx, rect rect,
+             ui_elem_colours colours);
+bool ui_noodle(const window *wnd, ui_ctx *ctx, line ln, ui_elem_colours colours,
+               rect parent_node);
 
 #endif // !UI_H