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

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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?

Answer 1

Best Answer

Answer by jgodfrey · Apr 30, 2016 at 07:02 PM

Check the "Combining LayerMasks" section in the accepted answer here:

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

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jgodfrey · Apr 30, 2016 at 07:34 PM 0

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So, specifically, that'd be something like this:

 int mask1 = 1 << Layer$$anonymous$$ask.NameToLayer("Floor");
 int mask2 = 1 << Layer$$anonymous$$ask.NameToLayer("GrateFloor");
 int combined$$anonymous$$ask = mask1 | mask2;
 grounded = Physics2D.Linecast(player.position, groundCheck.position, combined$$anonymous$$ask);

Shessen · Apr 30, 2016 at 08:12 PM 0

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That worked, thanks.

murchu27 · Jan 10, 2019 at 12:05 PM 0

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Upvoting for translating the Javascript used in the referenced answer to C# :P

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

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