I'm making a unity game, I have enemies that have to go through all objects except themselves. That is, I set a "Is Trigger = true" for them, and they easily fly through all the objects, but they also collect in a heap over time and it’s not clear how many enemies fly after me.
I know about such a method as "Physics2D.IgnoreCollision()", but I can not find a normal explanation of how it works.
In general, you need to teach objects to ignore the same as them.

CodePudding user response：

Use Unity's layers and collision matrix.

Assign the enemies to a layer named Enemy To do this, select the Enemy GameObject (or prefab) and click Layer > Add Layer

Type Enemy into User Layer 8 or any blank slot

Go back to the Enemy GameObject/prefab, click Layer > Enemy

Change the collision matrix to ignore collisions between enemies:

Go to Edit>Project Settings>Physics and uncheck the Enemy > Enemy checkbox in your collision matrix (see image for example collision matrix)