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All Projects → pr0g → Unity Portal Rendering

pr0g / Unity Portal Rendering

Licence: mit
Super small example of using offscreen render targets to achieve a portal effect in Unity

Labels

unitygraphicscameraportal

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unity-portal-rendering

Overview

Super small example of using off-screen render targets to achieve a portal effect in Unity.

alt text

Info

Please see this accompanying blog post http://tomhulton.blogspot.co.uk/2015/08/portal-rendering-with-offscreen-render.html for an explanation of the techniques involved.

  • UPDATE (2020/07/22,23): Upgraded Unity project, minor desktop camera improvements, fixed minor bug with Teleport.cs, renamed main branch.
  • UPDATE (2019/01/28): Added touch screen camera controls when running on device.
  • UPDATE (2019/01/21): Added teleportation (so moving through a portal will spit you out the other side).

Note: There's an artefact you'll encounter when moving through a portal where the near clip plane of the camera will clip with the portal texture quad. You wouldn't get this if using the portal stencil buffer technique but unfortunately with render buffers there's no clean way around it. The logic can still be applied if you'd like to use it elsewhere.

Controls

Desktop

WASD - Camera forward/backward/strafe
EQ - Camera adjust height
Right Mouse Button + Mouse Move - Look around
C - Cycle between main camera and portal camera views

Device

One Finger, Hold + Move - Look around
One Finger, Double Tap + Hold - Move forward
Two Fingers, Pinch - Move forward/backward
Two Fingers, Pan - Move up/down/left/right (Camera space)
Three Fingers, Tap - Cycle cameras

Extra

I highly recommend checking out this excellent YouTube video on Portals by Sebastian Lague.

It covers quite a few more details that you might need for a full game and also comes with its own GitHub repo.

The video also kindly gives a shout out to the original article posted along with this repo! 😄

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