How can I programmatically set a game to launch on a specific monitor using Unity?

Setting a Unity Game to Launch on a Specific Monitor

Understanding Display Indexing in Unity

Unity allows developers to specify which display to use based on the Display.displays array. Before you can launch your game on a specific monitor, you need to ensure Unity recognizes all connected displays. This is achieved by calling Display.Activate() for each display you want to use.

Steps to Programmatically Set Display

1. Ensure all displays are initialized: Use Display.displays.Length to get the number of connected displays, and call Display.displays[i].Activate() within a loop to make them available.
2. Set the desired display: Modify the Screen class to select a specific display at runtime. Use Screen.SetResolution() along with Screen.fullScreenMode to target the correct monitor.

using UnityEngine;

public class MultiDisplaySetup : MonoBehaviour {
    void Start() {
        if (Display.displays.Length > 1) {
            for (int i = 1; i < Display.displays.Length; i++) {
                Display.displays[i].Activate();
            }
            Screen.SetResolution(1920, 1080, FullScreenMode.FullScreenWindow, 60);
            Screen.fullScreenMode = FullScreenMode.Windowed;
            Screen.fullScreen = true;
            // Select the third display (zero-based index)
            Display.displays[2].Activate();
            // Move window to the selected display
            Screen.SetResolution(Display.displays[2].renderingWidth, Display.displays[2].renderingHeight, true, 60);
        }
    }
}

Handling Different Monitor Resolutions

It is crucial to handle various resolutions for different monitors. Make sure to adjust the game's rendering settings to match the display's native resolution and aspect ratio. Use DisplayInfo and Screen.resolutions to tailor the settings, ensuring an optimal user experience.

Get ready for an exciting adventure!

Considerations for Developing Multi-Monitor Support

• Monitor Order: Confirm the order of monitors in the operating system settings matches the expected setup in Unity.
• Resolution Scaling: Adapt to different resolutions and scaling when switching displays to maintain graphical fidelity.
• Testing: Test your game on different monitor setups to ensure reliability.