How to detect touching a 3D object in the scene and change its texture

⚠️ for it to work correctly, the object must have some type of collision ⚠️

In your Java class, do the following:

public class YourClass extends Component {
    
    // creates a new texture
    public Texture texture; // select in properties
    
    // creates a new Laser
    private final Laser laser = new Laser();
    
    // creates a new Camera, @Singleton attaches the first Camera component it finds in the scene
    @Singleton
    private Camera camera;

    @Override
    public void start() {
        
    }

    @Override
    public void repeat() {
        
        // checking whether the first touch detected on the screen is null and returning the code if it is true
        if(Input.getTouch(0) == null) return;
        
        // Vector2 responsible for storing the position of the first touch detected on the screen
        Vector2 position = Input.getTouch(0).getPosition();
        
        // the direction of the ray that will be fired from the camera at the position of the "position" variable 
        RayDirection rayDirection = camera.screenPointRay(position);
        
        // the ray that will be fired
        Ray ray = new Ray(rayDirection, 0);
        
        // the laser collision point
        LaserHit laserHit = laser.trace(ray);
        
        // checking if laserHit is non-null
        if(laserHit != null) {
            
            // fetching the ModelRenderer of the object that laserHit detected
            ModelRenderer modelRenderer = lasetHit.getObject().findComponent(ModelRenderer.class);
            
            // checking if ModelRenderer is non-null
            if(modelRenderer != null) {
                
                // changing the texture of the object's ModelRenderer 
                modelRenderer.getMaterial().setTexture("albedo", texture);
            }        
        }
    }
}

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