Let say I have a Spaceship in space. I also have a asteroid in the same space. I want a to be able to rotate a camera around the ship. I want to be able to rotate the ship, here is the big problem. When I rotate around the first axle (Let say X) the whole system rotates so when I later want to rotate around some other axle it have moved and the ship don’t rotate as I want. Example: I rotate 90 degrees around X this moves Y to where Z was and Z to where Y was. If I now want to rotate around Z the ship will rotate around Y. And that is NOT what I want! ! ! What I am trying to do is a Ship that: Turn its Nose UP or Down (its own X) when key pressed, however it is turned in any way. Rotates around its own Z when LEFT/RIGHT key is pressed

I realy need this!!

So please someone how to rotate around all axes in the same cordinate system.

Please help me...

me try this dont work:

glRotatef(rotX,1.0f,0.0f,0.0f);
glRotatef(rotY,0.0f,1.0f,0.0f); //wrong system
glRotatef(rotZ,0.0f,0.0f,1.0f); //even more wrong

DrawShip();


i want tha later 2 to rotate around the same as the first...

Help!!!!

How does gluLookAt(); work???

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I have come to understand that the previous post was hard to understand so I will try to explain it more careful this time.

What I am trying to do:
- A spaceship simulator (mush like SpaceWars on NeHe’s Site witch by the way doesn’t work as I want either).
- Control the ship with the Arrow keys.
- The Arrow should represent the ship controls.
This means that if I pull back the controls (DOWN KEY), the ships nose should tilt UP.
And UP KEY should tilt the nose DOWN.
LEFT & RIGHT KEY should SPIN the ship.
- I want the camera to follow the ship.
- I want Asteroids to and they should rotate constantly in the same way.


Problems:
- If I use this for the ship it obviously don’t work.
And it doesn’t work better for the asteroids.

glPushMatrix();

glTranslate(shipXpos, shipYpos, shipZpos):
glRotatef(shipXrot, 1.0f, 0.0f, 0.0f);
glRotatef(shipYrot, 1.0f, 0.0f, 0.0f);
glRotatef(shipZrot, 1.0f, 0.0f, 0.0f);

DrawShip();

glPopMatrix();


Solutions:
- This is where I hoped you fill in.

Thanks you in advance…

I think you should rotate then translate, but, IamQwerty, are you really doing you rotations as follows:

glRotatef(shipXrot, 1.0f, 0.0f, 0.0f);
glRotatef(shipYrot, 1.0f, 0.0f, 0.0f);
glRotatef(shipZrot, 1.0f, 0.0f, 0.0f);

Or, was that just a misprint? If it is the way you''re doing it, the correct way is as follows:

glRotatef(shipXrot, 1.0f, 0.0f, 0.0f);
glRotatef(shipYrot, 0.0f, 1.0f, 0.0f);
glRotatef(shipZrot, 0.0f, 0.0f, 1.0f);

Morgan