UI3 Input Controls / Game Modes

The Game Mode defines the type of game for the project. How to control it and what type of UI is used.

Some of the content here may be slightly different between versions.

This is the Game Mode for keyboard and mouse controls. It uses

• SDotUI3_CharacterV3
• SDotUI3_ControllerKeyMouse. The controller blueprint contains all the nodes to navigate the menu.

The game mode contains a node from the OpenXR plugin to disable the VR headset.

The Info Map will work without changes with this game mode.

Use this Game Mode for touch screen devices. Also use it if you want to Pixel Stream onto a touch screen device. It uses

• SDotUI3_CharacterV3
• SDotUI3_ControllerTouch. The controller blueprint contains all the nodes to navigate the menu.

The game mode contains a node from the OpenXR plugin to disable the VR headset.

Touch can be simulated during development with Project Settings -> Input -> Use Mouse For Touch. Note that this will block the Mouse input from working in the keyboard mouse game mode.

Settings in the Info Map blueprint:

Use this Game Mode with the XBox gamepad controller or any other compatible controller. It also supports the VIVE and Oculus/Quest controller. Find some more info for the use of other controllers at the end of the page.

This Game Mode uses the

• SDotUI3_CharacterV3
• SDotUI3_ControllerGamepad. The controller blueprint contains all the nodes to navigate the menu.

The game mode contains a node from the OpenXR plugin to disable the VR headset.

Select may be either [SPACE] or [ENTER] in earlier versions.

Use this Game Mode for VR scenes. It enables the 3D interface on the virtual tablet. It uses

• SDotUI3_CharacterV3
• SDotUI3_ControllerGamepad. This is the same as described in the GameModeGamepad

Follow the link below to read more about the VR mode.

Using VR with UI3

You can use other controllers if they are generally supported in Unreal. You may have to activate them through a plug-in, or they may become available once they are connected.

Then add their buttons to the input controls in the Project Settings. Navigate to Engine / Input and then add your controller buttons to the Bindings. This should be somewhat self-explanatory.

Action Mappings are button clicks like ENTER, or keyboard shortcuts like [I] = Screenshot.

Axis Mappings are for player movement or mouse turn.

Detailed information can be found in the Unreal Engine Documentation.

Unreal Engine Documentation - Input

The actual input keys and buttons are assigned in the file MC_ArchVizUI3 in the same folder. Here are two examples of how it works:

Keyboard Key S

This key controls the backwards movement. The movement directions are 2 dimensional and can be X or Y, forward or backward. You'll need 2 modifiers for this control key

• Swizzle Input Axis Values redirects the default input value from the default direction X to the control direction forward, which is Y.
• Negate will invert (negate) the value to direct backwards instead of forward.

Gamepad Left Stick

The lift stick is a 2 dimensional input controller. The 2 modifiers for the use of this type of input for movement are

• Dead Zone is a limiter that stops input of low values from the controller. Most controllers are not perfectly calibrated and send low values when they are idle.
• Scalar is a simple multiplier that increases the value of the stick 50 times for X and Y axis.

A simple Button for Select wouldn't need any modifiers by default.

Enhanced Input on YouTube