OnCollisionEnter2D: Some collision really happened, means two objects collide with each other.
OnTriggerEnter2D: Collision not really happened when you set up
Is Trigger is true.
For example, if two objects, one with
Is Trigger off (Object A), the other with
Is Trigger on (Object B). So Object A can pass Object B.
Few things in order to make sure the
OnTriggerEnter2D() get called on Object B.
- Both Object A and Object B must have the
- Object B must have the
- Be careful about the friction. If the Object A and Object B are two far away, Object A might cannot collide with Object B.
And that is it!