# \#havoc

**URL:** https://forum.babylonjs.com/tag/havoc/331.md

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## [Forces in Havoc off by a factor of 2](https://forum.babylonjs.com/t/forces-in-havoc-off-by-a-factor-of-2/44362)

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**Author:** [@ComicSans](https://forum.babylonjs.com/u/ComicSans)\
**Replies:** 6\
**Last updated:** [October 9, 2024, 5:36pm UTC](https://forum.babylonjs.com/t/forces-in-havoc-off-by-a-factor-of-2/44362 "2024-10-09T17:36:27Z")

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Hi folks, While converting my games from Ammo to Havoc, I noticed that applyForce was behaving very differently. I recognize that there are many difference between the engines, especially at low velocities, but it appea…

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## [Havok - is it possible to write updates to internal memory buffers?](https://forum.babylonjs.com/t/havok-is-it-possible-to-write-updates-to-internal-memory-buffers/45864)

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**Author:** [@arcman7](https://forum.babylonjs.com/u/arcman7)\
**Replies:** 5\
**Last updated:** [December 13, 2023, 3:28pm UTC](https://forum.babylonjs.com/t/havok-is-it-possible-to-write-updates-to-internal-memory-buffers/45864 "2023-12-13T15:28:28Z")

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Hi, I would like to know if it’s possible to write directly to memory with the havok physics engine, I’d imagine its similar to ammo.js in that it’s wasm binary is using a float32 array for storage or some other array bu…

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## [Havok heightmap](https://forum.babylonjs.com/t/havok-heightmap/41833)

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**Author:** [@Marcello\_Fabbiani](https://forum.babylonjs.com/u/Marcello_Fabbiani)\
**Replies:** 5\
**Last updated:** [June 22, 2023, 8:56pm UTC](https://forum.babylonjs.com/t/havok-heightmap/41833 "2023-06-22T20:56:02Z")

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PhysicsShapeType.MESH works well for heightmap building, but i want to know if it is possible to instance a PhysicsShapeType.HEIGHTFIELD, or PhysicsShapeType.MESH is better than cannon HeightmapImpostor?

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## [Havoc, ThinInstances & CollisionCallback](https://forum.babylonjs.com/t/havoc-thininstances-collisioncallback/40315)

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**Author:** [@aWeirdo](https://forum.babylonjs.com/u/aWeirdo)\
**Replies:** 4\
**Last updated:** [May 2, 2023, 7:30am UTC](https://forum.babylonjs.com/t/havoc-thininstances-collisioncallback/40315 "2023-05-02T07:30:33Z")

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Hi team, Adding additional ThinInstances after creating the physics body, calling body.updateBodyInstances() fails to update some internal properties used for collisions callback / observable, causes a crash. Edit; Up…