Скачать или смотреть How to Manage ZStack z-index Offsets for Model3D Views in visionOS

Discover how to effectively disable automatic z-axis adjustments in `ZStack` for `Model3D` views on visionOS, ensuring your 3D models remain on the same Z-plane.
---
This video is based on the question https://stackoverflow.com/q/76580179/ asked by the user 'Ben Gottlieb' ( https://stackoverflow.com/u/6694/ ) and on the answer https://stackoverflow.com/a/76582266/ provided by the user 'Andy Jazz' ( https://stackoverflow.com/u/6599590/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

Visit these links for original content and any more details, such as alternate solutions, latest updates/developments on topic, comments, revision history etc. For example, the original title of the Question was: ZStack z-index offset on visionOS with Model3D views

Also, Content (except music) licensed under CC BY-SA https://meta.stackexchange.com/help/l...
The original Question post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license, and the original Answer post is licensed under the 'CC BY-SA 4.0' ( https://creativecommons.org/licenses/... ) license.

If anything seems off to you, please feel free to write me at vlogize [AT] gmail [DOT] com.
---
How to Manage ZStack z-index Offsets for Model3D Views in visionOS

When working with SwiftUI on visionOS, developers often encounter the challenge of arranging multiple Model3D views within a ZStack. By default, a ZStack automatically adjusts the z-axis position of each successive view, which can lead to undesirable layouts where models appear on different planes. If you've been puzzled by how to keep your 3D models uniformly aligned, you're in the right place! In this guide, we'll break down the solution step-by-step.

Understanding the Issue

When you add multiple Model3D views inside a ZStack, the system allocates each model a depth value based on its stacking order. This means that models added later tend to overlap or sit at different depths, often leading to confusion in their visual arrangement.

The Problem

ZStack Behavior: Automatically applies incremental z-axis offsets for each subsequent view.

Visual Outcome: Models may hover above or below each other, causing a misrepresentation of your intended design.

The Solution

To keep all your 3D models on the same z-plane, you can simply adjust the depth and alignment parameters of each Model3D view to identical values. This way, they will all align in the same depth space, avoiding the default offset behavior.

Step-by-Step Implementation

Here’s how you can implement this approach in your SwiftUI code.

Import Required Libraries:
Make sure you import SwiftUI and RealityKit, as these are essential for working with 3D models in your application.

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

Create Your ContentView Structure:
Define your main view which will encapsulate your ZStack.

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

Add Your Model3D Views:
Include your Model3D views within the ZStack. Make sure to set the depth and alignment parameters to the same values for each model.

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

Preview Your Component:
Utilize the SwiftUI preview functionality to visualize your layout.

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

Code Example

Here’s the full code snippet to solidify your understanding:

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

Conclusion

By following these steps, you can effectively manage the stacking of Model3D views in a ZStack and ensure they stay on the same z-plane. This approach not only enhances visual clarity but also helps maintain consistent design aesthetics in your visionOS applications. If you're keen on crafting compelling 3D layouts, mastering ZStack behavior is essential. Happy coding!