VR Laser & W3C Hover Interaction

Quest 3D WebView features a complete input subsystem designed for VR motion controllers and hand tracking raycasts.

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1. Laser Raycast UV Interaction

When pointing a VR motion controller laser at a 3D web screen:

1. Perform a standard LineTraceByChannel from the controller forward vector.
2. If the trace hits the screen mesh, call Find Collision UV to extract the normalized (U, V) intersection point:
   • U: 0.0 (Left) to 1.0 (Right)
   • V: 0.0 (Top) to 1.0 (Bottom)
3. Pass the FVector2D UV into Quest 3D WebView input nodes!

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2. Interactive Nodes Reference

ClickUV(Vector2D UV)

Performs a synthetic single click (Touch Down immediately followed by Touch Up) at the given normalized UV coordinate.

• Best used for: Primary trigger button clicks on links, buttons, and video thumbnails.

SendHoverEventUV(EQuestWebViewTouchAction Action, Vector2D UV)

Dispatches W3C compliant hover and mouse move events to the webpage.

• Dispatches: Native Android ACTION_HOVER_MOVE, ACTION_HOVER_ENTER, ACTION_HOVER_EXIT as well as JavaScript pointerover, pointerenter, pointermove, and mouseover DOM events.
• Result: Web menus open on laser hover, buttons highlight, tooltips appear, and interactive charts animate!

SendTouchEventUV(EQuestWebViewTouchAction Action, Vector2D UV)

Sends continuous touch down, touch move, or touch up events.

• Supported Actions: Down, Move, Up, Cancel.

BeginDragUV / DragToUV / EndDragUV

Convenience nodes designed for dragging sliders, scrollbars, Trello cards, or Google Maps panoramas.

ScrollBy(int32 DeltaX, int32 DeltaY)

Scrolls the active webpage horizontally or vertically in pixels.

• Best used for: Mapping the VR thumbstick / joystick directly to smooth web scrolling (e.g. Thumbstick Y Axis * 50 $\to$ DeltaY).

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3. Pixel-Space Input Nodes

For non-VR setups, standard 2D mouse pointers, or custom screen math, the plugin also provides direct pixel-space variants:

• SendTouchEvent(Action, PixelX, PixelY)
• SendHoverEvent(Action, PixelX, PixelY)