HavokPlugin.raycast does not use collideWith filterMask correctly when raycasting against trigger shapes

erikhoj · August 29, 2024, 8:13am

Hello!

I ran into an issue when trying to raycast against triggers. The raycast works fine as long as I don’t use the collideWith filter. However, as soon as I define that, the raycast no longer collides with the triggers, even if all the filters line up.

The bug can be seen here: https://playground.babylonjs.com/#BF7GJA#2

erikhoj · August 29, 2024, 8:25am

Looking through the source code here:

github.com

BabylonJS/Babylon.js/blob/master/packages/dev/core/src/Physics/v2/Plugins/havokPlugin.ts#L2108


      
           * Performs a raycast from a given start point to a given end point and stores the result in a given PhysicsRaycastResult object.

           *

           * @param from - The start point of the raycast.

           * @param to - The end point of the raycast.

           * @param result - The PhysicsRaycastResult object to store the result of the raycast.

           * @param query - The raycast query options. See [[IRaycastQuery]] for more information.

           *

           * Performs a raycast. It takes in two points, from and to, and a PhysicsRaycastResult object to store the result of the raycast.

           * It then performs the raycast and stores the hit data in the PhysicsRaycastResult object.

           */

          public raycast(from: Vector3, to: Vector3, result: PhysicsRaycastResult, query?: IRaycastQuery): void {

              const queryMembership = query?.membership ?? ~0;

              const queryCollideWith = query?.collideWith ?? ~0;

          

              result.reset(from, to);

          

              const shouldHitTriggers = false;

              const bodyToIgnore = [BigInt(0)];

              const hkQuery = [this._bVecToV3(from), this._bVecToV3(to), [queryMembership, queryCollideWith], shouldHitTriggers, bodyToIgnore];

              this._hknp.HP_World_CastRayWithCollector(this.world, this._queryCollector, hkQuery);

It seems like shouldHitTriggers is always set to false. It’s very odd that a raycast without a collideWith mask hits a trigger then. I just tested locally by reimplementing the functionality and raycasting with shouldHitTriggers=true, and it works like expected.

Is it possible that you could include a configuration option in the raycast query so we can make raycasts that hit triggers aswell. It seems a little odd to leave it out, especially when it is not mentioned in the documentation.

Cedric · August 29, 2024, 9:28am

Let me add that to the query options!

Cedric · August 29, 2024, 9:45am

erikhoj · August 30, 2024, 7:45am

Thanks Cedric!

Topic		Replies	Views
Let us set filter masks for HavokPlugin.prototype.raycast() Feature requests physics , havok	3	610	May 2, 2023
How to use trigger (ghost) collisions in havok? Questions physics , havok	8	878	May 23, 2023
Havok plugin - raycast doesn't update the result if there's no Hit Bugs havok	7	442	May 10, 2023
The code example for test raycast query is not working for collideWith == 3 Bugs raycastvehicle	7	143	May 4, 2024
Wide raycasts and overlap tests with Havok Completed Features physics , havok	4	533	July 15, 2024

HavokPlugin.raycast does not use collideWith filterMask correctly when raycasting against trigger shapes

Related Topics