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Question by oliver-jones · May 08, 2013 at 07:05 PM · raycastpositionvector3

Dynamically Change Position of RayCast

Hello,

I'm using a Transform to reference where I want to cast a ray from:

 var referenceObject : Transform;
 
 if(Physics.Raycast (referenceObject.transform.position, direction, hit))

But I want to be able to also dynamically change the position slightly within the code. For now, just add 3 onto the Z axis:

 var firePos = referenceObject.transform.position;
 var lineStartPos = Vector3(firePos.x, firePos.y, firePos.z + 3);

The only problem with that code, is that its in world space, and not local to the referenced object.

How would I fix this?

Thanks

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avatar image robertbu · May 27, 2013 at 06:09 AM 0
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The position used in Physics.Raycast() is a world coordinate, not a local one.

avatar image Benproductions1 · May 27, 2013 at 08:22 AM 0
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@robertbu I think he means the z + 3, which is relative to the global axis, but should be relative to the local axis... maybe... hard to say

avatar image Benproductions1 · Jun 03, 2013 at 04:23 AM 0
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Has this been fixed?

avatar image robertbu · Jun 03, 2013 at 05:28 AM 0
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If @Benproductions1 is right that you want to add to the local 'z' (forward) axis, you can do:

var lineStartPos = transform.position + transform.forward * 3.0;

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Answer by Benproductions1 · May 27, 2013 at 05:37 AM

Hello,

It's hard to tell what you want to do, but if you want to transform a point from local to world space, you can use referenceObject.TransformPosition(point:Vector3) to make your point relative to the object.
If you want to change a direction from local to world space, you use TransformDirection :)

Hope this helps,
Benproductiosn1

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