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This was posted earlier by Devil Master:

Look at this code: it uses the Xrotate, Yrotate and Zrotate commands to (theoretically) move the camera in every direction. BUT... I noticed that, whilst the X axis rotates with the camera, the Z axis does not. This means that if the camera is looking 90? to the right or 90? to the left, the X and Z axes will coincide!
Try it. You move up and down with the up and down arrows, left and right with the left and right arrows, and you ROLL left and right by holding the right mouse button and pushing the left and right arrows. Move 90? to the left or to the right, move up and down (note the code of the up/down movements) and then try to roll...

Now I'm having the same problem. I've build a camera (like you're sitting in a cockpit) that can rotate around it's x and y axis. So it can go up and down with the upkey and downkey (turn around the x-axis). And it go's left and right with the left and right key(turn around the y-axis). Now the problem is that I want to roll the plane as well. So in the initial position (lets say flighing north) when I turn around the z-axis the plane rolls well. But when I'm flighing west or east the plane will go up and down instead of rolling. Conclusion is that the Z-axis doesn't turn with the camera. Normally it must have a 90 degrees angle with the x-axis. But now the x-axis becomes the z-axis.

Is this a bug? Am I doing someting wrong? Is it maybe better to roll the camera oriented to an object? Pleas help me with this problem. I promised my friends I will create a much better version of the old game Retaliator!

Give code examples...

try using the free flight rotate commands like turn object, pitch object, and roll object
they are alot easier to work with!