Stop Guessing: Debug and Visualize your Unity AI like a Pro with Gizmos and Live States

Debugging artificial intelligence can feel like trying to fix an engine while the car is moving. You see your NPC getting stuck against a wall, failing to detect the player despite being right in front of them, or simply stopping their patrol for no apparent reason. Without visual tools, you are working blind, relying solely on console logs that flood your Debug window.

At Noocturnal Games Studio, we understand that an indie developer’s time is their most valuable resource. That is why our Modular AI Behaviour Kit is not just a powerful modular logic tool; it includes a professional-grade visual debugging system that transforms the development process from a trial-and-error nightmare into an intuitive and fluid workflow.

The AI Black Box Problem

Most AI systems fail because they are opaque. You cannot ‘see’ what the NPC is thinking. Are they in a chase state? Have they lost line of sight? Are they waiting for an attack cooldown to end?

Perception Visualization: Your NPC’s Eyes and Ears

With our kit, configuring senses stops being theoretical math and becomes visual design. The PlayerDetector component automatically draws Gizmos in your scene representing the enemy’s actual vision cone.

• Vision Arcs: Adjust the detection radius and View Angle and watch the Gizmo update in real-time.
• Occlusion Lines: If the NPC detects the player, a solid red line will connect both GameObjects. If the vision is blocked by an obstacle, the line disappears, confirming your Obstruction Layer is working correctly.
• Alert and Sound Spheres: Visualize a SoundReceiver’s hearing radius or an Alerter’s reach with soft-colored spheres to avoid unnecessary overlapping between patrols.

Live Debugging: The Inspector as a Dashboard

Forget about setting breakpoints every two minutes. Our custom editors expose a Live State section that only appears when you press Play.

// Example of what you will see in the custom Inspector during Play Mode:
[Current State]: Chasing
[Target]: Player_Hero (GameObject)
[Distance to Target]: 4.5m
[In Attack Range?]: False

This information allows you to instantly identify why a transition is not occurring. If the state says ‘Searching’ but the NPC is not moving, the problem might be your NavMesh rather than your AI logic.

Patrol Paths and Intelligent Movement

The SimplePatrol component redefines how you manage movement. Instead of a boring list of coordinates, the editor draws lines connecting your waypoints, visually differentiating those with special actions (like waiting or playing an animation) through purple colors and distinct icons.

During a chase or flee behavior, the system draws dynamic lines towards the calculated Flee Destination. If you see the flee line going through a wall, you will immediately know you need to check your NavMesh baking in that specific area.

Conclusion

The difference between a game that feels ‘polished’ and one that feels ‘broken’ usually lies in its AI consistency. By using the visualization tools of the Modular AI Behaviour Kit, you remove the guesswork from your development. You are not just creating smarter enemies; you are doing it in half the time.