Quaternion Cameras and projectile vectors

Posted by Tom J Nowell on Stack Overflow See other posts from Stack Overflow or by Tom J Nowell
Published on 2010-04-15T14:25:23Z Indexed on 2010/04/15 14:33 UTC
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math

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rotation

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c++

In our software we have a camera based on mouse movement, and a quarternion at its heart.

We want to fire projectiles from this position, which we can do, however we want to use the camera to aim. The projectile takes a vector which it will add to its position each game frame.

How do we acquire such a vector from a given camera/quaternion?

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