Basic drawing

src/simulator.zig

@@ -30,14 +30,39 @@ pub const Simulator = struct {
     }
 
     pub fn handleInput(self: *Simulator, pos: rl.Vector2) void {
+        self.handleKeyboardInput();
         self.handleMouseInput(pos);
     }
 
+    fn handleKeyboardInput(self: *Simulator) void {
+        if (rl.isKeyReleased(.c)) self.clear();
+    }
+
     fn handleMouseInput(self: *Simulator, pos: rl.Vector2) void {
         if (rl.isMouseButtonReleased(.left)) self.leftClickEvent(pos);
     }
 
     fn leftClickEvent(self: *Simulator, pos: rl.Vector2) void {
-        // TODO
+        const cur_node = self.node_man.getSelectedNode(self.allocator, pos) catch |err| {
+            std.debug.panic("Failed to append the newly created node at pos ({d}, {d}) to node list: {}\n", .{
+                pos.x, pos.y, err
+            });
+        };
+
+        if (self.node_man.temp_node) |temp| {
+            self.road_man.addRoad(self.allocator, temp, cur_node) catch |err| {
+                std.debug.panic("Failed to add a new road or assigning its nodes: {}\n", .{err});
+            };
+
+            self.node_man.temp_node = null;
+            return;
+        }
+
+        self.node_man.temp_node = cur_node;
+    }
+
+    fn clear(self: *Simulator) void {
+        self.road_man.clear();
+        self.node_man.clear(self.allocator);
     }
 };