Changing Raycast origin upwards (offset)

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Hello, I have an annoying problem and I seached everywhre but couldn't find the solution.

I need t ochange the origin point of a raycast, I defined localOffset for it and I did exactly like all solutions that are supposed to work, but it is just not working:

All it does is change the direction of the ray, the origin however still stays at the origin of the game object (player character in this case, which is far too low). So now the ray goes forward and up a bit.

I want to cast from about middle height (0.5).

 var localOffset = transform.position + transform.up * 0.5;
 var hitCollision : RaycastHit;
 var CollisionCheckRange : int = 1.1;
 
 if (Physics.Raycast (localOffset, transform.forward, hitCollision, CollisionCheckRange))

Answer 1

Best Answer

Answer by Benproductions1 · Apr 08, 2013 at 01:17 AM

Hello,

You should look up how Vectors work and the difference between global and local space. The origin of a Raycast is in global space, your localOffset is also in global space, therefore you have to convert your localOffset to global space, when you use it as global space. To do this, I suggest you use the Transform function called TransformPoint It transforms a point from local space to global space. Therefore:

 if (Physics.Raycast(transform.TransformPoint(localOffset), transform.forward/*... etc*/)) {

Hope this helps, Benproductions1

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Cherno · Apr 08, 2013 at 06:26 PM 0

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Thanks for the suggestion, unfortunately it does not help, it still just changes the direction of the ray but the origin still remains at the game object's origin (i.e. the bottom).

Another solution which is infact like my code looks at the moment is presented here:

http://answers.unity3d.com/questions/224511/how-can-i-offset-a-raycast-along-the-transforms-lo.html

But that user had the same problem as me so he had to resort to a workaround.

Benproductions1 · Apr 08, 2013 at 10:37 PM 0

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@Cherno It does work, your just not using it right

Cherno · Apr 09, 2013 at 05:57 AM 0

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Heh you are right I forgot to change my Debug ray as well! Thanks!

Edit: On further testing it breaks down as soon as I turn my player object, the point the ray is pointing at is then 1 unit to the right (left turn) or left (right turn).

Edit2: Now the original solution from the other linked thread works, I don't know what to think anymore, maybe I just forgot to change my DeBug rays and hence was under a false assumption. Anyway here's the working line of code again. Don't forget that a DeBug ray also needs the localOffset ins$$anonymous$$d of a transform.position :)

 if  (Physics.Raycast (localOffset, transform.forward, hitCollision, CollisionCheckRange))

Changing Raycast origin upwards (offset)

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