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Asked: 2025-02-21T12:14:15+05:30

How can I maintain circular button shapes across different aspect ratios in Unity’s Screen Space – Camera canvas?

anonymous user

I’m really stuck on something and could use some help from the community. I’m working on a mobile game using Unity, and I’ve set up my UI with a Screen Space – Camera canvas. The scaling is set to “Scale With Screen Size”, and I thought that would take care of most issues. Everything looks great on standard 16:9 devices, but I’m hitting a serious snag with taller screens, like those 19.5:9 ratios.

Here’s the issue: I’ve got these circular buttons that are supposed to be perfectly round, but when the game runs on those taller screens, they stretch out and look like ovals. It’s frustrating because I want to make the best use of that extra vertical space without losing the visual integrity of my buttons. I know that maintaining button shape fidelity is super important for the user experience, especially since these are all touch targets. The last thing I want is for players to have trouble with buttons that look wonky and feel awkward to tap.

I’ve tried playing around with different canvas settings and anchors, but I’m still not getting the desired results. I want my buttons to stay circular regardless of the aspect ratio or screen size. Ideally, I’d like a solution that allows me to maintain touch target sizes consistently across all devices. I’ve heard about using Aspect Ratio Fitter components, but I’m not entirely sure how to implement it effectively without messing up the layout for other UI elements.

If anyone has been through this or has any tips or tricks up their sleeve, I’d really appreciate it! Maybe you’ve found a clever workaround or a method to keep those buttons nicely circular. I’m all ears for suggestions or tutorials that could point me in the right direction. Thanks in advance for any help!

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    2 Answers

    1. anonymous user

      To maintain circular buttons regardless of the screen’s aspect ratio, you can utilize the Aspect Ratio Fitter component effectively. First, attach an Aspect Ratio Fitter component to your button GameObject. Set the ‘Aspect Mode’ to ‘Height Controls Width’ if you want the height of the button to control its width, or ‘Width Controls Height’ for the opposite. By doing this, you ensure that as the UI scales with different resolutions and aspect ratios, the button maintains its shape. You may also want to make sure that the Rect Transform settings have adequate constraints. Position your buttons using anchors set to the corners or edges to allow for more flexibility as the resolution changes. This setup not only preserves the roundness of the buttons on taller screens but also retains usability.

      In addition to using the Aspect Ratio Fitter, consider implementing a CanvasScaler script that adjusts for screen dimensions dynamically. You could write a simple script that adjusts the size of your buttons based on the current screen height and width. For instance, you can measure the current aspect ratio at runtime and alter the size of your buttons accordingly to maintain their circular shape. Combining these strategies will allow you to maximize screen space usage while ensuring a consistent user interaction experience across all devices. Make sure to test it on various devices and resolutions to ensure the implementation is robust across different displays.

    2. anonymous user

      It sounds like a tricky situation! When you have circular buttons that are stretching into ovals, it’s usually related to how Unity handles the scaling in the UI. You’re on the right track thinking about the Aspect Ratio Fitter!

      Here’s a simple suggestion you can try:

      1. Add Aspect Ratio Fitter: On your circular button GameObject, add an Aspect Ratio Fitter component. This can help maintain the round shape as it automatically adjusts the size based on the aspect ratio of the parent.
      2. Set the Aspect Mode: Change the Aspect Ratio Fitter’s Aspect Mode to Height Controls Width or Width Controls Height depending on how you want to maintain the circle. This will ensure that your button remains circular, no matter the screen dimensions.
      3. Adjust Canvas Scaler: Make sure your Canvas Scaler is correctly set to Scale With Screen Size, with a reference resolution that’s based on the most common aspect ratio you’re targeting.

      For touch targets, make sure the buttons are sized well enough to tap easily. You can check if the buttons maintain their functionality by testing them, especially on devices with different aspect ratios.

      If you find this isn’t working perfectly, you might need to tweak other aspects of your UI layout, but starting with the Aspect Ratio Fitter is definitely a good move. Also, don’t hesitate to check out Unity forums or YouTube tutorials for visual guidance on setting this up!

      Good luck, and I hope this helps keep your buttons perfectly round! 😊