I have provided a screenshot of the code. Open up LineOfSight in your script editor. Choose your main camera in your scene and add a new C# Script component to it called LineOfSight: Now that we’ve done that, let’s go ahead and implement the raycast. Next, click on the cube and add a rigidbody component using the Add Component window: Once the tag is created, click on the Cube again and choose the new Interactive tag from the tag drop down menu In the tag manager, click the + icon to create a new tag.
To create a custom tag, choose the cube in your scene and, in the inspector, click the Tag drop-down menu and choose “Add Tag…” Keep in mind that you can do this with an object name or any number of different variables.įor simplicity we’ll be using a tag to determine what we’re looking at. We will use the tag to determine what object we are looking when our Raycast hits it. Once the cube is in place, we will want to create a custom tag for it. Move the cube somewhere close to your controller so we can quickly and easily test any functionality we are working on.
Once you have your basic scene setup, we’ll create a cube by going to GameObject → 3D Object → Cube, as seen here:
If you don’t have a controller, then import the standard assets/characters package and drag and drop one of the prefab controllers into your scene. If you don’t, then go ahead and create a new scene, create some kind of plane you can walk around on, and put a character controller in the scene. In this post, I will be giving examples of how to implement a Raycast in Unity 3D and how to use the Raycast information to determine if an object is in line of sight of the user and if we can interact with that object.įirst of all, I’m going to assume that you already have a scene setup with a character controller of some kind that you can use. Unity 3D has built-in functions that can be used to implement a Raycast in your game. A raycast is, essentially, a ray that gets sent out from a position in 3D or 2D space and moves in a specific direction. Raycasting is commonly used in video game development for things such as determining line of sight of the player or the AI, where a projectile will go, creating lasers and more.
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