How to use multiple layer masks with a box cast.

[Harvii]

How can I make it so the raycast can detect 2 layers instead of 1?

public LayerMask collisionLayerMask;

RaycastHit2D raycastHit = Physics2D.BoxCast(bc2D.bounds.center, bc2D.bounds.size, 0f, Vector2.down, extraHeightTest + extraHeightTest, collisionLayerMask);

[Kurt-Dekker]

The difference between Layers vs LayerMasks:

Raycast "layermask" parameter

The layer is a number from 0 to 31. It corresponds to each of those named layers. A layer MASK is a 32-bit bitfield that says which of these you want to ignore. This enables you to ignore (mask) multiple layers, each one represented by a single bit in the 32-bit integer. In your code above, 9 (Collision) is a layer, NOT a mask. Raycast takes a layermask. If you want to turn a layer name into a LayerMask, here’s the utility you want: You can also go cheap and cheerful and rotate the bits yo…

“There are 10 types of people in this world: those who understand binary, and those who don’t.”

[NeilB133]

In your inspector, for the collisionLayerMask var your created, you can selected multiple Layers in that dropdown it’ll then only apply to those Layers.