Object not positioning correctly on another object [HELP]

[Thiago_Mn]

Hello!

I'm making a tank game, but i just noticed that something was not right, i have 1 object that is the "Tank Body" and another object that is the "Tank Turret/Gun" and how I'm trying to make a 2D game where the camera is on top, i had the idea of putting an angle where the tank is aiming to the mouse but the gun was not positioning right because of the Origin of the "Tank Body" sprite and the "Tank Turret/Gun", the Turret/Gun was out of position in the body, because of the angle where the tank was directing to, and i don't know how to solve this. Is there a way to the Turret/Gun stay in the same position when the "Tank Body" has change of angle?

Any help, i would be thankful!

Edit:Sorry for my bad english.

Here's a screenshot:

 

[TheouAegis]

Set the tanks angle to zero. Place the turret where you want it relative to the tank. Now get the direction and length from the tank origin to the turret origin. save these values in either the tank or the turret, whoever is going to be updating the turret position. When you snap the turret to the tank you can use the lengthdir functions using the length you saved and adding the angle you saved to the tank's image_angle.

Tip: if for whatever reason you were going to limit the number of angles the tank can go to, you can save time by free calculating all of the lengthdir offsets and storing them in an array.

 

[Thiago_Mn]

Set the tanks angle to zero. Place the turret where you want it relative to the tank. Now get the direction and length from the tank origin to the turret origin. save these values in either the tank or the turret, whoever is going to be updating the turret position. When you snap the turret to the tank you can use the lengthdir functions using the length you saved and adding the angle you saved to the tank's image_angle.

Tip: if for whatever reason you were going to limit the number of angles the tank can go to, you can save time by free calculating all of the lengthdir offsets and storing them in an array.

I'm sorry to ask you, but could you try to show me a code example? i'm very noob on it, and also i don't speak english either.
(I'm really confused on what you said up there, i just understanded somethings and one of these things didn't worked when i tried.)