Скачать или смотреть Fixing the Speed Discrepancy Between Unity Editor and Mobile Builds

Discover how to resolve the performance issues leading to different speed behaviors of game objects in your Unity mobile builds.
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Understanding the Speed Discrepancy in Unity Builds

When developing games in Unity, developers often encounter unexpected differences between how their game behaves in the Unity Editor and its performance on mobile platforms. A common issue arises when objects that follow the player character, such as followers or companions, seem to move significantly slower or faster depending on the build type. This discrepancy can be frustrating, particularly when you're trying to balance gameplay.

The Problem: Game Object Speed Variation

In one instance, a developer noticed that a game object designed to follow the player character (in a 2D platform game) operated smoothly in the Unity Editor but exhibited poor performance on an Android build. They set the speed values in the editor, only to realize they had to apply immensely higher speed values (150x or even 200x) in the build to achieve the same effect. This created an uncomfortable situation: the speed felt all wrong across different build types, ruining the visual consistency of gameplay.

The Solution: Making Speed Frame Rate Independent

The root cause of this problem often lies in the differences in frame rate between the Unity Editor and a mobile build. The editor typically runs at a much higher frame rate compared to mobile devices, causing movement calculations to differ considerably. The solution to this issue revolves around making speed calculations frame rate independent, so that objects move consistently regardless of the frame rate.

Step-by-Step Fix

To ensure smooth and consistent movement across all platforms, you can modify your speed calculations as follows:

Using Time.deltaTime:
The primary adjustment involves multiplying your speed by Time.deltaTime. This ensures that speed variations are proportional to the frame time and not tied to the frame rate.

[[See Video to Reveal this Text or Code Snippet]]

In this code, speed is adjusted based on how long it takes to render the last frame (as provided by Time.deltaTime), allowing for a much smoother experience across devices.

Why This Works

Frame Rate Independence: By integrating Time.deltaTime, you've created a consistent factor that adjusts the speed based on actual time spent rendering the frames, accommodating varying hardware performance.

Fluid Gameplay: This method ensures that regardless of whether the game is running on a high-performance PC or a lower-end mobile device, the movement speed will feel the same to players.

Final Adjustments

After making these changes, you can run your game on both the Unity Editor and the mobile build to test and fine-tune the speed variable. This may still require some tweaking based on how fast or slow the desired movement feels, but this approach lays the foundation for a balanced gameplay experience.

Conclusion

Navigating the disparities between Unity Editor and mobile build performance can be a challenge. By applying frame rate independence through Time.deltaTime, you can mitigate speed discrepancies and create a smoother gaming experience for players across all platforms. Don’t hesitate to adjust your speed values as needed to find the perfect balance for your game!

Feel free to leave comments below if you have any other questions or tips about Unity development!