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Question by zapextreme · Oct 19, 2017 at 09:06 PM · 2d game2d-platformerraycasthit2d

How would I make my gameobject align to the ground 2d

So, I am trying to make my player align to the collider under it, but it is not working. I have gone about searching for solutions online, but nothing works. Please, can someone show me how?

EDIT: javascript please

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Answer by AlienNova · Oct 19, 2017 at 09:41 PM

 RaycastHit2D hit = Physics2D.Raycast (player.transform.position, -player.transform.up);
 player.transform.rotation = hit.rotation;

This is in C# because I don't know Javascript syntax

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avatar image zapextreme · Jan 09, 2019 at 05:04 PM 0
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Sry for the really late accept. I use c# now, but thanks!

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Answer by Ratslayer · Oct 19, 2017 at 09:32 PM

I assume what you mean by "align" is that you want to have your character stand on the object underneath.

To do that, you need to cast a ray downwards from your character's position. If the distance between the character and the hit is smaller than its height / 2, that means it's colliding and you set its position to the collision point + height. Something like this:

 RaycastHit hit;
 Physics.Raycast(new Ray(transform.position, Vector3.down), out hit);
 float distance = (transform.position - hit.point).magnitude;
 //you need to determine height of your character yourself
 //I assume that character center is in the middle
 if (distance <= characterHeight * 0.5f)
 {
     transform.position = hit.point + Vector3.up * characterHeight;
 }

You can put that code into Update function.

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avatar image zapextreme · Oct 19, 2017 at 09:49 PM 0
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alt text

I mean like rotate to the normal of the ground beneath it like sonic the hedghog, but still have the ability to jump or leave the ground. ( Javascript)

sonicthumb-1484334979466.jpg (359.8 kB)

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