Ant Colony Pheromone Foraging (2D)

This 2D companion runs the same stigmergic mechanic as the 3D ant colony scene — a nest, foraging ants and the environment they interact with — but as a real, numerically simulated two-pheromone ant colony optimization model instead of a decorative mound. Ants leave the nest with no map, lay a "to-home" trail while searching and a "to-food" trail while returning, and both fields evaporate every frame; the paths that survive are the ones enough ants keep reinforcing. Drop food sources and obstacles anywhere on the stage and watch the trail network reshape itself, with a live path-efficiency stat showing the trip length converging toward the shortest walkable route.