detecting collision of collided object 2d

[jabirmoolur]

I have three 2d objects for
during object one hits the object 2 if any objct3 touching on object2 i want to perform some action on object 3

i have scripts for each object

basically i what i want to achive is when object 1 touches object 2, if any object3 is in touch with object 2 at that time, i want to destroy those object3

[nopogo]

If you want to utilise the unity 2d physics there are a few steps:

• give each object a 2d collider
  component.
• give the moving
  objects a rigidbody2d
• check for collision in a oncollision2denter/oncollision2dStay function (Unity - Scripting API: Collider2D.OnCollisionEnter2D(Collision2D))

The unity manual explains all this really well over at:

Unity - Manual: Physics Reference 2D