# Intersection between 2 objects **URL:** \ **Category:** Questions\ **Tags:** intersection\ **Created:** [December 17, 2023, 10:33am UTC](https://discourse.threejs.org/t/intersection-between-2-objects/59323 "2023-12-17T10:33:09Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![HMb\_Mead](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/hmb_mead/32/43070_2.png) [@HMb\_Mead](https://discourse.threejs.org/u/HMb_Mead)\ **Post date:** [December 17, 2023, 10:33am UTC](https://discourse.threejs.org/t/intersection-between-2-objects/59323/1 "2023-12-17T10:33:09Z")
hi I’m new with three.js and face problem I will appreciate any help the problem is I have ball moving in helix path and collide with plane I will stopped the ball at this point my equation is how to find intersection point between ball and plane ```javascript Three.js Ball in Helix Motion ``` ---
**Author:** ![anidivr](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/anidivr/32/32924_2.png) [@anidivr](https://discourse.threejs.org/u/anidivr)\ **Post date:** [December 17, 2023, 12:13pm UTC](https://discourse.threejs.org/t/intersection-between-2-objects/59323/2 "2023-12-17T12:13:05Z")
These might be helpful. They have intersect methods [Sphere – three.js docs (threejs.org)](https://threejs.org/docs/index.html?q=plane#api/en/math/Sphere) [Plane – three.js docs (threejs.org)](https://threejs.org/docs/index.html?q=plane#api/en/math/Plane) ---
**Author:** ![HMb\_Mead](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/hmb_mead/32/43070_2.png) [@HMb\_Mead](https://discourse.threejs.org/u/HMb_Mead)\ **Post date:** [December 17, 2023, 12:59pm UTC](https://discourse.threejs.org/t/intersection-between-2-objects/59323/3 "2023-12-17T12:59:04Z")
thanks for replay this doc. is useful to check if there is an intersection but its not tell where the intersection is ---
**Author:** ![anidivr](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/anidivr/32/32924_2.png) [@anidivr](https://discourse.threejs.org/u/anidivr)\ **Post date:** [December 18, 2023, 1:46pm UTC](https://discourse.threejs.org/t/intersection-between-2-objects/59323/4 "2023-12-18T13:46:18Z")
When they do intersect, you’ll need to cast a ray from the ball to the plane to get the [intersection details](https://threejs.org/docs/index.html?q=ray#api/en/core/Raycaster.intersectObject)