UX ENGINEERING • FLIGHT SIMULATION
DESIGNING PRECISION MOBILE FLIGHT CONTROLS
How we solved 3D spatial navigation on flat mobile glass using floating virtual joysticks, circular deadzones, exponential input curves, and auto-trim stability.
1. The Touchscreen Precision Problem
Unlike physical console gamepads with spring-loaded analog sticks and haptic feedback, glass touchscreens provide zero tactile centering. Players' thumbs naturally drift away from fixed UI positions during intense combat dogfights, resulting in missed turns and crashes.
In Operation Black Sky, we addressed this through three key UX innovations:
Dynamic Floating Joystick
The virtual joystick spawns directly wherever the player's thumb first touches the left half of the screen, completely eliminating thumb drift.
Exponential Response Curves
Small thumb deflections apply gentle, micro-precise aiming adjustments for machine gun tracking; full deflections trigger rapid emergency barrel rolls.
Auto-Trim Leveling
When the player releases the stick, the helicopter or jet smoothly rights its roll angle back to the horizon, preventing unintentional death spirals.
2. Exponential Input Smoothing in C#
Here is the mathematical input shaping algorithm used in our flight controllers:
using UnityEngine;
public static class FlightInputMath
{
/// <summary>
/// Shapes raw touch stick input with a circular deadzone and cubic power curve.
/// </summary>
public static Vector2 ProcessStickInput(Vector2 rawInput, float deadzone = 0.1f, float sensitivityPower = 2.2f)
{
float magnitude = rawInput.magnitude;
if (magnitude < deadzone)
{
return Vector2.zero; // Ignore micro finger jitter
}
// Normalize after deadzone subtraction
float normalizedMagnitude = (magnitude - deadzone) / (1f - deadzone);
float shapedMagnitude = Mathf.Pow(normalizedMagnitude, sensitivityPower);
return rawInput.normalized * shapedMagnitude;
}
}