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https://github.com/fweidner/UE4-Plugin-OffAxis

This plugin provides a fishtank-VR via a so-called OffAxisProjection by modifying the projection matrix using a custom ULocalPlayer
https://github.com/fweidner/UE4-Plugin-OffAxis

fishtankvr offaxisprojection unreal-engine unreal-engine-4 unrealengine virtualproduction virtualreality vr

Last synced: about 1 month ago
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This plugin provides a fishtank-VR via a so-called OffAxisProjection by modifying the projection matrix using a custom ULocalPlayer

Host: GitHub
URL: https://github.com/fweidner/UE4-Plugin-OffAxis
Owner: fweidner
License: mit
Created: 2018-04-26T07:32:10.000Z (over 6 years ago)
Default Branch: master
Last Pushed: 2023-12-15T11:07:10.000Z (12 months ago)
Last Synced: 2023-12-15T12:30:56.545Z (12 months ago)
Topics: fishtankvr, offaxisprojection, unreal-engine, unreal-engine-4, unrealengine, virtualproduction, virtualreality, vr
Language: C++
Homepage: https://www.tu-ilmenau.de/vwds/team/florian-weidner/
Size: 23.5 MB
Stars: 74
Watchers: 11
Forks: 19
Open Issues: 6
Metadata Files:
- Readme: README.md
- License: LICENSE

Awesome Lists containing this project

awesome_unreal_engine_4_-_5 - OffAxis
awesome_unreal_engine_4_-_5 - OffAxis

README

        # UE4-Plugin-OffAxis

![OffAxisExample](https://github.com/fweidner/UE4-Plugin-OffAxis/blob/master/2018-06-13.gif)

## Current version

- Works with 4.23 :)

- check out the branch "UE5" with info on how to run it for UE5

## General info: 

It works. But it is (always) experimental :)

* OffAxisProjection / FishTank VR

  * in 2D Mode: OffAxisActor can be placed arbitrarily.

  * in 3D Mode: OffAxisActor can be translated in x,y, z and rotated using pitch and roll.

* Also shows a possibility of how to modify the projection matrix. 

## How to use:

Assuming you start with a new project:

- If your project is a C++ project, you are good to go. If you have a pure blueprint project, add a random C++ class via File -> Add C++ class (empty class is fine).

- Copy the Plugin in your (you might need to create a Plugin folder in the directory where your uproject file is).

- Start (or restart) Unreal Engine. You might get a warning that the plugin needs to be rebuild. That's normal.

- Update LocalPlayer class in Edit->Project Settings->General Settings 

- Adjust Input mappings to your Config/DefaultInput.ini (just copy the below mappins to your Config/DefaultInput.ini. If you don't have one, create a random new mapping in Settings --> Project Settings --> Input. Then the file should be there. Then copy the mappings. Restart UE4.

- Drag the OffAxisActor in your scene

- Set position of OffAxisActor to 0,0,0

- In the OffAxisActor, place the child actors P_a, P_b, and P_c so that the correspond to the corners of your "virtual window".

- Change your NearClippingPlane .1f (Settings --> Project Settings --> Engine --> General Settings --> Near Clip Plane)

- Select the OffAxisActor in your Project Outliner: set "Use Off Axis on Start" to true and change "Tracking Device" to None (the Set Tracking Device Setting is still in early stages).

- Hit play. If it is not working now, close UE4, right-click on your uproject file and regenerate Visual Studio Project Files, try again :)

- If it starts but the screen is black, try to either move the STartPositionEye of the OffAxisActor along X or (if you have copied the input mappings) play around with pageUp and pageDown.

## Input Mappings

* Here are the current input mappings the plugin supports/uses. Just copy and paste this bunch in your DefaultInput.ini and restart after updating DefaultInput.ini!

* For some inputs, you might need to change the key if they are already in use in your project.

### OffAxis

+ActionMappings=(ActionName="HomePosReset",bShift=True,bCtrl=False,bAlt=False,bCmd=False,Key=Home)

+ActionMappings=(ActionName="ResetEyeOffset",bShift=True,bCtrl=False,bAlt=False,bCmd=False,Key=Nine)

+ActionMappings=(ActionName="ResetProjectionPlaneOffset",bShift=True,bCtrl=False,bAlt=False,bCmd=False,Key=Six)

+ActionMappings=(ActionName="ToggleShowDebugMessages",bShift=True,bCtrl=False,bAlt=False,bCmd=False,Key=V)

+ActionMappings=(ActionName="ToggleUseOffAxis",bShift=True,bCtrl=False,bAlt=False,bCmd=False,Key=P)

+ActionMappings=(ActionName="Pick",bShift=False,bCtrl=False,bAlt=False,bCmd=False,Key=LeftMouseButton)

+ActionMappings=(ActionName="ToggleVisOffAxisMenu",bShift=False,bCtrl=False,bAlt=False,bCmd=False,Key=F9)

+AxisMappings=(AxisName="EyeUp",Scale=1.500000,Key=Up)

+AxisMappings=(AxisName="EyeUp",Scale=-1.500000,Key=Down)

+AxisMappings=(AxisName="EyeLeft",Scale=-1.500000,Key=Left)

+AxisMappings=(AxisName="EyeLeft",Scale=1.500000,Key=Right)

+AxisMappings=(AxisName="EyeForward",Scale=1.000000,Key=PageUp)

+AxisMappings=(AxisName="EyeForward",Scale=-1.000000,Key=PageDown)

+AxisMappings=(AxisName="Pick_away",Scale=0.100000,Key=W)

+AxisMappings=(AxisName="Pick_left",Scale=-0.100000,Key=A)

+AxisMappings=(AxisName="Pick_down",Scale=0.100000,Key=Q)

+AxisMappings=(AxisName="Pick_away",Scale=-0.100000,Key=S)

+AxisMappings=(AxisName="Pick_left",Scale=0.100000,Key=D)

+AxisMappings=(AxisName="Pick_down",Scale=-0.100000,Key=E)

+AxisMappings=(AxisName="Wheel",Scale=1.000000,Key=MouseWheelAxis)

+AxisMappings=(AxisName="MouseX",Scale=1.000000,Key=MouseX)

+AxisMappings=(AxisName="MouseY",Scale=1.000000,Key=MouseY)

+AxisMappings=(AxisName="ChangeProjectionPlaneOffset",Scale=0.100000,Key=Five)

+AxisMappings=(AxisName="ChangeProjectionPlaneOffset",Scale=-0.100000,Key=Six)

+AxisMappings=(AxisName="MoveUp",Scale=0.100000,Key=I)

+AxisMappings=(AxisName="MoveDown",Scale=-0.100000,Key=K)

+AxisMappings=(AxisName="MoveLeft",Scale=-0.100000,Key=J)

+AxisMappings=(AxisName="MoveRight",Scale=0.100000,Key=L)

+AxisMappings=(AxisName="Away",Scale=0.100000,Key=U)

+AxisMappings=(AxisName="Towards",Scale=-0.100000,Key=O)

+AxisMappings=(AxisName="ChangeEyeOffset",Scale=0.001000,Key=Seven)

+AxisMappings=(AxisName="ChangeEyeOffset",Scale=-0.010000,Key=Eight)

### Optitrack related:

+ActionMappings=(ActionName="TryToConnectToServer",bShift=True,bCtrl=False,bAlt=False,bCmd=False,Key=One)

+ActionMappings=(ActionName="ConnectToOptitrack",bShift=True,bCtrl=False,bAlt=False,bCmd=False,Key=Y)

## Based on...

http://nttl.ru/en

https://perspectiveresources.blogspot.de/2013/04/i3d-head-coupled-perspective.html

http://iihm.imag.fr/en/demo/hcpmobile/

https://www.youtube.com/watch?v=hvrT7FqpPQE

https://www.youtube.com/watch?v=-foNLFnrNRc

https://www.youtube.com/watch?v=PP38yj3zdqo

https://www.youtube.com/watch?v=5ibPBGCAWKo

http://csc.lsu.edu/~kooima/articles/genperspective/

Michael Deering. 1992. High resolution virtual reality. ACM SIGGRAPH Computer Graphics 26, 2: 195–202. https://doi.org/10.1145/142920.134039

https://answers.unrealengine.com/questions/65003/howto-modify-the-projection-matrix.html