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Cooking Grenades AI

AI cooks grenades

November75

Friday, 2:14 pm

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This mod was sparked by the brilliant idea of 👑adishee. Heartfelt thanks to adishee for their inspiration!

AI cooks grenades with varying probability and timing accuracy based on their level. This mod does not alter Big Brain or general AI behavior; When the AI pulls out a grenade to throw the grenade, we calculate the cooking probability and pauses the AI's grenade throw animation to simulate cooking.

Demonstration with perfect cooking timing.

Features

• Level-Based Cooking:
  • Low-level AI (Level 1): 20% cooking chance, ±0.3~0.5 timing error.
  • High-level AI (Max Level): 50% cooking chance, ±0~0.1 timing error.
• Configurable Settings:
  • Adjust cooking probability and timing error.
  • Enable/disable logging for debugging.
• Testing Tools:
  • Test cooking probability and timing error across levels and base times.

How It Works

• When QuickGrenadeThrowHandsController.Spawn (PatchPostfix):
  • Calculates cooking probability to decide if the AI should cook.
  • Estimates grenade flight time to the target.
  • Computes cooking time: grenade fuse time (GetExplDelay) minus flight time, adjusted for level-based error.
  • Pauses the throw animation (Animator.speed = 0) to simulate cooking.
  • Resumes animation after subtracting the throw animation time (~0.7842s)
• Cooking Probability (ShouldCookGrenade):
  • Determines if AI cooks based on level.
  • Uses linear interpolation (Mathf.Lerp) between MinLevelCookingProbability (10% at level 1) and MaxLevelCookingProbability (50% at max level).
• Flight Time Calculation (CalculateFlightTime):
  • Estimates grenade flight time from AI to target.
  • Calculates time using distance and speed, adding 12.5% per 10m to account for trajectory curve (designed with Grok AI's help).
  • Note: The flight time formula is not perfect, as it only considers straight-line distance with a basic curve adjustment.
• Timing Error Adjustment (AdjustErrorCookingTime):
  • Adjusts cooking time with level-based error.
  • Interpolates error range: ±0.3~0.5 (level 1) to ±0~0.1 (max level).
  • Randomly speeds up or slows down cooking time.

Note

• Due to my lack of coding skills, the AI animation pauses at the start rather than mid-animation.
• This mod does not affect accuracy, but the default vanilla AI throw accuracy is not perfect. Cooked grenades may hit walls and return to the AI.

Installation

• Requires SPT 3.11.x
• Unzip into your SPT folder.

Configuration

• Cooking Probability:
  • Min Level Cooking Probability: Chance at level 1 (default: 0.2, 20%). (Scav LVL is 1)
  • Max Level Cooking Probability: Chance at max level (default: 0.5, 50%). (Scav LVL is 1)
• Timing Error:
  • Min/Max Error at Low Level: Error range at level 1 (default: 0.3~0.5).
  • Min/Max Error at High Level: Error range at max level (default: 0~0.1).
• Testing:
  • Test Level: Level to test (0 = all levels, default: 0).
  • Test Base Time: Base time to test (0 = 0.5 to 5.0 step 0.5, default: 0).
  • Enable Cooking Probability Test: Enable probability test (default: false).
  • Enable Timing Error Test: Enable error test (default: false).
• Logging:
  • Log to File: Enable logging to BepInEx/LogOutput.log (default: false).
  • Log to In-Game Debug Window: Enable in-game debug logs (default: false).

Testing

Use the testing to verify AI behavior:

1. Enable tests in Enable Cooking Probability Test or Enable Timing Error Test.
   • Configure Test Level (e.g., 1 for level 1, 0 for all).
   • Configure Test Base Time (e.g., 2.0 for 2s, 0 for 0.5~5.0).
2. Run the game and check logs:
   • BepInEx/LogOutput.log (if Log to File enabled).
   • In-game debug window (if Log to In-Game Debug Window enabled).

Debugging

Enable logging:

• Log to File: Outputs to BepInEx/LogOutput.log.
• Log to In-Game Debug Window: Shows logs in-game.

Videio referance

0 Error Test

Default Error Test

Credits

• Idea From : This mod was sparked by the brilliant idea of 👑adishee. Heartfelt thanks to ❤️adishee for their inspiration!
• Amazing .csproj Support: Huge thanks to ❤️Michael P. Starkweather and ❤️CJ for their fantastic .csproj files, which made this mod possible. Your help is truly appreciated!
• SPT Modding Community: I referenced the source code of many mods for learning purposes while creating this mod. Sincere thanks to the community for making their mods open-source and helping me learn.
• Grok AI: An all-knowing friend who answers any question I have.

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