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Get rotation from car recordings in carrec.img

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Hi, I don't know if this is the correct section to post this, but here we go.

I'm trying to implement car recordings into MTA SA. The only thing left to implement is the rotation.

I'm using default GTA SA's carrec RRR's. Looks like I need the RightXYZ and TopXYZ, so I'm guessing those are vertices from the vehicle matrix. I tried setting the matrix, but car rotations are incorrect (and since there's no forward vector, I just leave it as it is?). I also tried converting the matrix into rotation, but that didn't work too.

That's probably because MTA uses Euler rotations instead of quaternions (as RenderWare does). MTA is open-source, so go ahead and check it out.


So does anyone know how to get Euler angles from RightXYZ and TopXYZ?

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In GTA III, the forward vector is the cross product of the right vector and the top vector. It should be the same for SA.

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Posted (edited)

I think that's correct, thanks.

I still couldn't get rotation to work. My matrix looks like:


RightXYZ: 1.0236220472441, 2.007874015748, 0

ForwardXYZ: 0, 0, -1.0319920778275

UpXYZ: 0.0078740157480315, 1.0236220472441, 0


Converting this matrix to euler rotation gives me: 270, 0, 62.987

but it should be something similar to: 0, 0, 179.785 (that's only an approximation, Z is Yaw)


Again; I'm doing this in MTA.

Edited by GTX3

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