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Getting screen resolution independent swipe/drag distance

I'm building a very simple basketball game where the player will launch a basketball based on a swipe/drag. I can get the start and end point of the swipe, as well as the time it took to complete. I use distance over time to get the speed and use that value to build a vector to launch the ball.

The problem I have is the following:

On a device with a resolution of 1280x720 the pixel distance of the swipe is different than on a device with a 1920x1080 resolution. On a device with a higher resolution, the player would have to do a much shorter swipe.

What I would like to do is get the screen resolution so I can divide the pixel distance by the screen height. That way it would work the same for any resolution.

So my question is:

  • Is there a way to get the screen resolution at runtime? The Viewport Size node only works in-editor.

  • Is there another or better way to get a resolution independent solution?

One thing I haven't tried but will give a shot is:

  • Parent a collider to the camera

  • Get the world space coordinates from the screen space location of the begin and end of the swipe

  • Use that distance to do the rest.

I'm guessing that way it would also work on any resolution, but somehow seems a bit hacky?

Product Version: UE 4.10
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asked Dec 20 '15 at 03:55 PM in Blueprint Scripting

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avatar image BillBeob Jan 12 '18 at 06:49 AM

Hi there, did you find a solution to your problem? And would you please mind sharing your solution, that woud be appreciated? Thanks

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