Скачать или смотреть How to Raycast from the Camera in Unity for Efficient Gameplay

Discover how to shoot a raycast from the center of the Camera in Unity, simplifying your code and enhancing your game mechanics. Learn step-by-step techniques here!
---
This video is based on the question https://stackoverflow.com/q/73242434/ asked by the user 'xavi zamora' ( https://stackoverflow.com/u/19597631/ ) and on the answer https://stackoverflow.com/a/73242488/ provided by the user 'Geeky Quentin' ( https://stackoverflow.com/u/17235431/ ) 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: Raycast from Camera in unity

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.
---
Mastering Raycasting from the Camera in Unity

Introduction

In game development with Unity, raycasting is a fundamental concept used for detecting collisions and interactions in 3D space. A common requirement is to shoot a ray from the camera's perspective rather than using the mouse position. This is particularly useful for first-person shooters or when implementing camera-based interactions. If you've been struggling with this, you've come to the right place! In this post, we will explore how to efficiently perform raycasting from the center of the camera, allowing for cleaner and more effective code.

The Initial Problem

You might have started with the following code snippet that captures mouse clicks and performs raycasting based on the mouse's position:

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

Here, the functionality is based on the mouse's location, which can be limiting. If your mechanics require shooting a ray from the center of the camera, this approach needs refinement.

The Solution: Raycasting from Camera Center

To improve your raycasting method, we need to change how the ray is generated. Instead of using the mouse position, we can create a ray that starts from the center of the screen. This is done by using the screen dimensions to find the midpoint. Here’s how you can achieve that:

Step-by-Step Breakdown

Define the Ray: Instead of using Input.mousePosition, you can directly calculate the center of the screen using Screen.width and Screen.height:

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

Perform the Raycast: Next, you will keep your raycast execution concept:

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

Check for Collisions: Finally, you can check for collisions with tagged objects in the scene, just like before:

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

Complete Improved Code

Putting everything together, your updated code will look like this:

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

Conclusion

With this simple adjustment, you're now able to shoot a raycast from the center of the camera instead of using the mouse position. This technique not only streamlines your code but also enhances user interactions in your game. Raycasting can drastically improve the mechanics and realism of interactions, especially in action-oriented games.

By following the methods described above, you can build robust functionality into your Unity projects that respond consistently to player inputs. Experiment with this technique, and explore how it fits into your unique game design! Happy coding!