Help with Modeling Tank Collision Physics Using Shapecast

[xxxwectorxxx (KeyMan)]

Hi everyone!

I’m working on a tank game in Roblox and trying to simulate collision physics with the terrain. I’m using Shapecast to detect the collision point, but I’m having trouble figuring out how to rotate the tank tangentially to that point while keeping it in the same position and ensuring it continues to face forward.

Here’s what I’m trying to achieve:

1. The tank should rotate based on the collision point (tangentially to the surface).

2. The tank’s position should remain unchanged.

3. The tank should still face forward (maintain its general direction).

I’m not using Roblox’s default physics, so I’m handling collisions manually. Could anyone provide guidance or code examples on how to achieve this? Specifically, how to calculate the correct rotation and apply it to the tank’s CFrame without moving it?

Like this:

Thank you!

[dthecoolest]

Like this?

How to get the angles of a surface?

Rather than trying to convert this up vector into an angle which is also complicated it’s better to leave it I would rather use @EgoMoose advanced CFrame technique to leave it in terms of vectors. We can obtain a CFrame rotation to align the current persons “UpVector” to the new surface upvector. Here is an example script and video. The advantage of this method is that it will allow you to rotate along the new upVector without having to specify a right vector as a CFrame.fromMatrix solution. …

[xxxwectorxxx (KeyMan)]

Yes, just as I wanted! Thank you!