Camera strafe

How Can I get camera strafe directions? I have tried this:

Code:

btVector3 bslide (sio2->_SIO2camera->_SIO2transform->dir->x*90.0f, sio2->_SIO2camera->_SIO2transform->dir->y, sio2->_SIO2camera->_SIO2transform->dir->z);

Works weel until I rotate the camera - bslide doesn't update, it's always the same world direction. Also tried to flip x with y with no succes (bugs between 0-90-180-360 angles).

Any advice will be great!

Regards,
Mad

Calculate the cross product of the direction vector of the camera and the up vector...

Works perfectly:

Code:


      btVector3 bforward (sio2->_SIO2camera->_SIO2transform->dir->x,
                     sio2->_SIO2camera->_SIO2transform->dir->y,
                     sio2->_SIO2camera->_SIO2transform->dir->z);
      
      btVector3 bside (0.0,
                   0.0,
                   1.0);
      
      btVector3 bslide = cross(bforward, bside);


Thank You!

Thanks for that!