PSA Source Engine - Perfect Sensitivity Finder

PSA Source Engine is a high-performance, web-based aim sensitivity calculator and trainer built specifically for Counter-Strike 2 (CS2) and other Source Engine titles. It leverages a 7-iteration Perfect Sensitivity Approximation (PSA) algorithm within a custom 3D WebGL environment to help players discover their mathematically ideal in-game sensitivity.

🚀 Key Features

• 3D PSA Testing Environment: Developed with Three.js to simulate actual in-game mouse movement, target tracking, and flicking.
• Iterative PSA Algorithm: A 7-step process that compares "High" vs "Low" sensitivity iterations to narrow down your optimal settings based on real-time performance.
• Method B (360° Physical Calibration): A unique tool that calculates base sensitivity by measuring the physical width of your mousepad.
• CS2 Accurate Math: Uses the industry-standard Source Engine yaw constant of $0.022$ to ensure 1:1 parity with in-game settings.
• Physical Metrics: Provides real-time calculation of your $cm/360$ (centimeters required for a full 360-degree turn).
• Multi-Language Support: Fully localized in English, Russian, Turkish, and Ukrainian.

🛠️ How It Works

1. Initial Setup: Enter your Mouse DPI and desired FOV (Default CS2 is 90).
2. Calibration:
   • Method A: Enter your current Source/CS2 sensitivity directly.
   • Method B: Select "Method B," place your mouse at the edge of your mat, drag it to the opposite edge, and press ESC to calculate your base sensitivity.
3. The PSA Test:
   • The engine runs 7 rounds.
   • In each round, you test two sensitivities (LOW and HIGH) for 15 seconds each.
   • Track and flick to the moving targets to earn points.
4. Final Results: The system provides your "Perfect Sensitivity" and the corresponding physical $cm/360$.

🎯 Post-Test Fine-Tuning

If the result feels slightly off in a live match, follow these guidelines provided by the tool:

• Overshooting: If your crosshair consistently passes the target during flicking, lower your result by $0.05 - 0.1$.
• Undershooting: If your movement feels sluggish or you fail to reach the target, raise your result by $0.05 - 0.1$.

💻 Technical Stack

• Logic: JavaScript (ES6+).
• 3D Rendering: Three.js (WebGL).
• Input: Pointer Lock API for raw mouse data simulation.
• UI: Modern CSS3 with Glassmorphism effects.

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🔗 Connect & Support