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Question by oliver-jones · Nov 25, 2016 at 12:52 PM · raycasttransformvector3directiontransformdirection

Raycast between TransformDirection and Vector3.Forward?

Hello,

I'm having a bit of a coding/transform/vector issue, which I can't my head around.

I'm currently firing a raycast from the direction my object is facing:

 Vector3 _dir = transform.TransformDirection(Vector3.forward);

Works fine, but I would like to add in an 'adjustment' so I can range between the TransformDirection, and a World Forward (Vector3.forward) - and range between those values:

 Vector3 _dir = Vector3.forward;

For example, if I have my 'adjustment range' at 0%, the raycast will point only in Vector3.foward World Space, but if I change it to 100%, the raycast will point in the TransformDirection (direction of transform).

Thus, if I have the range at 50% the raycast will be in between the values of Vector3.forward and TransformDirection.

I have no idea how to even code this up though? I can't get my head around it :/

A point in the right direction would be much appreciated (no pun intended). Thanks.

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Answer by Bunny83 · Nov 25, 2016 at 01:21 PM

Uhm so you want to slerp between world forward and local forward? Just do this:

 Vector3 _dir = Vector3.Slerp(Vector3.forward, transform.forward, percent);

Note that "percent" are "programmer-percent" (aka in the range of 0 to 1 ^^) This might be a bit misleading but using something like "perunum" would be even more confusing as nobody speaks latin :)

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avatar image Bunny83 · Nov 25, 2016 at 01:22 PM 0
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ps:

 tranform.forward 

is exactly the same as

 transform.TransformDirection(Vector3.forward)
avatar image oliver-jones · Nov 25, 2016 at 01:26 PM 0
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Thanks for that - I got it working, almost identical to yours. But I'm using Lerp, ins$$anonymous$$d of Slerp. What would be the difference in this case?

Thanks.

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