Function to convert UI Position to actual position?

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This is hard to put into words so I hope the picture helps. My guns are in my UI, as they are 2D sprites. Each gun may have a different position for it's muzzle so I want to draw a ray using the muzzle of the sprite and the players transform.forward.

I need to convert the UI's position from where it is in the canvas to where it is on the screen.

Please let me know if that makes sense, or is even possible.

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Answer 1

Answer by highpockets · Mar 12, 2021 at 10:20 PM

What you are going to want to use is Camera. ScreenToWorldPoint(new Vector3 (muzzPos.x, muzzPos.y, distanceFromCam));. That will be your muzzle position translated to world space

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highpockets · Mar 12, 2021 at 10:25 PM 0

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Your setup potentially requires this instead RectTransformUtility.WorldToScreenPoint(); while passing camera as null

Razputin highpockets · Mar 13, 2021 at 02:21 AM 0

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Thanks for the suggestions, these are what I've been trying to implement but I haven't been able to find the solution.

This is for casting a linerenderer from the muzzle to the raycasts hit.point. These are the implementations that I've tried.

         Vector3 v = RectTransformUtility.WorldToScreenPoint(null, fps.firePoint.transform.position);
         
         fps.lR.SetPosition(0, v);

         Vector3 v = Camera.main.ScreenToWorldPoint(new Vector3(fps.firePoint.position.x, fps.firePoint.position.y, maxFireDist));
         
         fps.lR.SetPosition(0, v);
 
         Vector3 v = Camera.main.ScreenToWorldPoint(fps.firePoint.transform.position);

Function to convert UI Position to actual position?

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