Integrating Neural Network-Based NPC Behavior on the HorizonX SDK

Game AI doesn’t have to be rigid. If you're working with the HorizonX console SDK, you can implement adaptive non-playable character (NPC) behavior using small, feedforward neural networks. This is easier than it sounds—just follow the steps below.

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Use Case: Adaptive Guard AI

Your NPC guard responds dynamically based on the player’s past behavior. The model takes real-time inputs like threat level, noise, and visibility, then chooses between being passive, investigating, or engaging the player.

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Inputs & Outputs

Inputs:

• `playerThreatLevel` (0.0–1.0)
  • `noiseLevel` (float)
    • `timeSinceLastSeen` (seconds)

      Output:

      • Behavior mode: `0 = PASSIVE`, `1 = INVESTIGATE`, `2 = ENGAGE`

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        Sample Code

        
        #include 
        AIBrainModule npcBrain;
        void SetupBrain() {
            npcBrain.LoadModel("models/guard_behavior.hnn");
        }
        void UpdateBehavior(float playerThreat, float noise, float timeSeen) {
            std::vector inputs = {playerThreat, noise, timeSeen};
            int behavior = npcBrain.Predict(inputs);
            switch (behavior) {
                case 0: NPC.SetState(PASSIVE); break;
                case 1: NPC.SetState(INVESTIGATE); break;
                case 2: NPC.SetState(ENGAGE); break;
            }
        }
        

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        Performance Tips

      • Quantize inputs to 8-bit floats for faster prediction.
        • Batch multiple NPCs to share compute cycles.
          • Do not retrain in real-time—use offline HorizonX Trainer for updates.

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            Final Thoughts: Looking To The Future

            If this is your first time using AI-driven NPCs, don’t stress. You can’t break anything by experimenting. Take your time, test different inputs, and review logs in the HorizonX Visualizer tool. Adaptive AI isn’t magic—it’s math made fun.