Скачать или смотреть Understanding Why It’s Impossible to Change Camera Viewport Rect with Pixel Perfect Camera in Unity

Ever wondered why you can't change the camera viewport rect while using the Pixel Perfect Camera in Unity? Discover the reasons behind it and explore a solution to enhance your development experience.
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Understanding Why It’s Impossible to Change Camera Viewport Rect with Pixel Perfect Camera in Unity

If you're a Unity developer working on a pixel art game, you've likely encountered the Pixel Perfect Camera feature. While it's designed to keep your pixel art crisp and clear, many developers find themselves frustrated when they can't change the camera's viewport rectangle. In this post, we will explore why this happens and how you can work around this limitation.

The Problem: Unchangeable Camera Viewport Rect

What is the Viewport Rect?

The viewport rect is essentially the portion of the camera that is rendered. It defines how much of the camera view is used for displaying the game. When using the Pixel Perfect Camera in Unity, it appears that you cannot change this viewport rect, leading to confusion and frustration among developers.

Why Can't You Change It?

The primary reason you cannot change the viewport rect while using the Pixel Perfect Camera is that the underlying script checks every frame whether a specific internal variable, m_Internal.useOffscreenRT, is set to true. If it's not, the script resets the viewport rect to its default values (0, 0, 1, 1). This automatic reset prevents any customization of the viewport rect.

The Solution: Modifying the Pixel Perfect Camera Script

Fortunately, after some investigation and experimentation, a solution has been discovered. You can modify the Pixel Perfect Camera script to store your desired viewport rect settings. Here’s how:

Step-by-Step Guide to Update the Script

Identify the Script: Start by locating the script of the Pixel Perfect Camera in your Unity project.

Modify the Awake Method: In the Awake method of the script, modify the default viewport rect to save the chosen viewport settings when the camera initializes.

Implement the Change: Here’s an example of how you would update the script:

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

Handle the Viewport in LateUpdate: Ensure that the camera's viewport rect is reassigned to the stored value in every frame. Add the following to the OnBeginCameraRendering method:

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

Final Code Example

Below is the complete structure of the updated method that incorporates the changes you need to make:

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

Conclusion

While the Unity Pixel Perfect Camera provides excellent functionality for those working with pixel art, its restrictions regarding the camera viewport rect can be a hurdle for developers. However, by following the steps outlined above to modify the script, you can effectively customize the viewport rect according to your needs.

This modification will enhance your development experience, allowing you to create stunning visuals in your pixel art games while maintaining the integrity of your artwork. If you have any questions or need further assistance, feel free to reach out!