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Question by BDX777 · Jul 20, 2014 at 11:27 AM · rotationraycastraycastingdirectionraycasts

Raycasting from object rotation?

Hello, I have a floppy "Gun" and I want a ray to cast from the tip of it, and while a ray does cast from the tip, it doesn't correlate with the rotation.

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avatar image Bojidar · Jul 20, 2014 at 12:24 PM 0
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Does this ray change rotation as you change the rotation of the "Gun"?

avatar image robertbu · Jul 20, 2014 at 03:26 PM 0
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We need to understand your setup and see your code. Typically you would cast from an empty game object positioned at the tip of the gun and a child of the gun. The forward (positive z) side of that empty game object would align with the barrel of the gun. Then you would use 'transform.forward' as your direction for your ray.

avatar image BDX777 · Jul 26, 2014 at 11:35 AM 0
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The ray does not change rotation as I change the rotation of the gun. I want a ray to cast with the rotation of the gun, not set to a specific axis.

avatar image robertbu · Jul 26, 2014 at 01:17 PM 0
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'transform.forward' is the forward direction of an object in world space. It changes as the object is rotated. You can use the transform.position and transform.forward in the Raycast().

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Answer by KMKxJOEY1 · Jul 26, 2014 at 11:55 AM

Your raycasting using the camera ray probably, what you need to do is create a ray like this:

 public Transform gunBarrel;
 
 Ray ray = new Ray(gunBarrel.position, gunBarrel.forward);
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avatar image BDX777 · Jul 26, 2014 at 12:47 PM 0
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No I really was casting from the object's position but it didn't work. I didn't establish it in a ray though so I'll try that.

avatar image BDX777 · Jul 26, 2014 at 01:13 PM 0
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Huzzah! Trying it as a ray worked!

avatar image zachmartinez · Jan 15, 2016 at 02:45 AM 0
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Dude seriously? I was also stuck on this for hours! Thanks a bundle!

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