Is it possible to provide an offset to the raycaster in three.js?

I am currently working on developing a pool game using three.js. As part of the gameplay, I have incorporated a helper ruler that indicates the direction of the hit. This ruler is represented by an ArrowHelper and is positioned at y=0, which aligns with my raycaster used to identify barriers in the game. However, I also need the raycaster to detect a ball located above y=0, specifically at y=0.35. I am seeking guidance on how to adjust the position of my raycaster higher in the scene so that it can accurately detect the ball as well. Is there a method to elevate my raycaster along the y-axis?

javascriptthree.js

Answer №1

If you have a clear understanding of where your raycaster is positioned and the direction it is facing in 3D space, you can easily utilize raycaster.set(). This method allows you to define both attributes effortlessly, ensuring that your direction is always normalized (with a total magnitude of 1):

let startingPoint = new THREE.Vector3(x1, y1, z1);
startingPoint.y += 0.35;
let forwardDirection = new THREE.Vector3(x2, y2, z2);
raycaster.set(startingPoint, forwardDirection.normalize());

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