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Question by zillion · Jul 11, 2012 at 09:10 AM · javascriptraycastpositionrayorigin

Changing position of a RayCast

Got a simple Raycast with this script:

 var hit: RaycastHit;
 var rayRange = 10;
 var rayDirection = transform.TransformDirection(Vector3.forward);
 if(Physics.Raycast(transform.position, rayDirection, hit, rayRange))
 {
 //So on, so on...
 }

Need to somehow change the starting origin of the Raycast... For example, at the moment it is casting from the bottom of my character, I just want to lift it up so its casting from around about the center of my character. Sure its a SUPER SIMPLE fix, just not to sure and quite new to Unity. Thank you in advance!

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Answer by whydoidoit · Jul 11, 2012 at 09:42 AM

Obviously it depends on how tall your character is and which way up it is facing - presuming it is always standing on the ground then you can add to the transform.position:

     if(Physics.Raycast(transform.position + Vector3.up * 0.75,

That would place the start of the cast 0.75 units upwards

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avatar image zillion · Jul 11, 2012 at 10:05 AM 0
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Thank you very much! Solved my question perfectly!

avatar image Kryptos · Jul 11, 2012 at 10:07 AM 0
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You could eventually use the local up vector, so that this takes the player rotation:

 if(Physics.Raycast(transform.position + transform.up * 0.75,
avatar image whydoidoit · Jul 11, 2012 at 10:07 AM 0
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No problem - actually on reflection you can also use transform.up ins$$anonymous$$d Vector3.up as well (this takes into consideration the rotation of your character)

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