Static check box for Sprites

hello ,
i'm working on 2.5 d game , i have significant amount of sprites which are causing some performance issues, some of those sprites are with collision some of them are not , i read somewhere that GameObjects with collision but no Rigid body are considered static ,so does checking the static check box have impact on performance or not in both cases
please need some light i'm new to this

 

Any object that doesn't move in your scene would be considered static. By checking the static checkbox this causes objects of the same type to become "batched", which will improve performance. Think of it as the engine basically saying okay, all objects of this type are the same so I don't need to go through each one and do special processing of any kind. So I'll just quickly throw all these up here and move on to the next task.

 

thanx alot BlueSin for the reply , so i have to check that static checkbox ,for every gameobject that will not be moved either it has collision or not , is this right ?

 

also i have another question ,
is it fine to have a non static GameObject as child of a static parent
parent have a collider and child have a collider and RB
thanx alot and sorry for too much questions

 

Static game objects cannot detect anything for collisions. True collisions are handled by the physics system and require at least one rigidbody. In theory, anything that moves in your game project should have a rigidbody attached to it. Anything that will not move should be static. Now that's not to say you can't have a collider on it. Although you could use SendMessage to communicate with the collided static game object from the rigidbody object.

As to your next question of a child object with rigidbody attached to a static parent, I think that should work out just fine. I haven't ever done it personally and I don't have access to Unity right this second to check, but if you can toggle the static check box on the child and it isn't locked to static because the parent is static then I would say yes you can.

 

thanx alot BlueSin ,that helped me alot