How does this collision target the other sprite's colour change?

[Stephen_Ross]

Can anyone explain why/how the “on trigger enter 2D” and “Sprite Renderer set colour” set up targets the Germ 2 sprite? I don’t understand where the link is here between them and why one’s colour is affected but not the other, i.e., the germ sprite is not even mentioned here.

[bixarrio]

OnTriggerEnter2D gives you the object that the object with the script graph (the player) collided with (germ 2). Germ 2 has a sprite renderer, so we get that sprite renderer from the collider (internally it will be using code that matches collider.GetComponent<SpriteRenderer>()) and then sets the color on that sprite renderer. It doesn’t need to know what entered the trigger. It only needs to know that it was an object with a sprite renderer. It could be any object.
Hope this answers your question

[Tuomo_T]

Bixarrio has it right, well done!

[Stephen_Ross]

Thank you, this is fantastic. Do we only get sprite renderer from germ 2 or could we access any of it’s information if we wish when using OnTriggerEnter2D?

[bixarrio]

Yes, you can get any of the components on it.