How can I check a Linecast across multiple layers, and assign the result to a single bool?

Questions & Answers
1

So, I want to have a player that’s registered as “grounded”(bool) when he stands on the “Floor” Layer or “GrateFloor” layer.

I use a Linecast to check a hit on the “Floor” layer, and set grounded to true or false based on that.
Here’s the code:

`// The player is grounded if a linecast to the groundcheck position hits anything on the floor layer.

grounded = Physics2D.Linecast(player.position, groundCheck.position, 1 << LayerMask.NameToLayer(“Floor”)); `

And it works. But what I need is to have the linecast also check the “GrateFloor” layer, but I’m not sure how. If I try this:

grounded = Physics2D.Linecast(player.position, groundCheck.position, 1 << LayerMask.NameToLayer("Floor") || LayerMask.NameToLayer("GrateFloor"));

or this:

grounded = Physics2D.Linecast(player.position, groundCheck.position, 1 << LayerMask.NameToLayer("Floor") || 1 << LayerMask.NameToLayer("GrateFloor"));

I get errors. If I try this:

grounded = Physics2D.Linecast(player.position, groundCheck.position, 1 << LayerMask.NameToLayer("Floor")); grounded = Physics2D.Linecast(player.position, groundCheck.position, 1 << LayerMask.NameToLayer("GrateFloor"))

one overrides the other.

What’s the best way to check more than one Layer, and assign the result to a single variable?

2

Check the “Combining LayerMasks” section in the accepted answer here:

http://answers.unity3d.com/questions/8715/how-do-i-use-layermasks.html