Bg2TouchEvent

The Bg2TouchEvent class represents touch input events in the bg2 engine TypeScript API. It extends EventBase, providing support for event propagation control.

This class encapsulates touch interaction data and exposes the original native browser event, allowing applications to handle multi-touch input in a normalized way.

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Constructor

constructor(touches: any, event: any)

Creates a new touch event instance.

Parameters

• touches: Collection of touch points associated with the event
• event: Original native touch event

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Properties

touches: any

Collection of active touch points.

This value is typically normalized relative to the canvas and may contain position and identifier data for each touch.

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event: any

Reference to the original native touch event.

Provides access to additional low-level data not exposed directly by the engine wrapper.

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Utility Functions

createTouchEvent(evt: any, mainLoop: any): TouchEvent

Creates a Bg2TouchEvent from a native browser touch event.

This function:

• Extracts touch information relative to the canvas
• Normalizes touch coordinates
• Returns a new Bg2TouchEvent instance

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Usage Notes

• Used in AppController callbacks such as touchStart, touchMove, and touchEnd
• Supports multi-touch interactions
• Touch coordinates are normalized relative to the canvas
• Use event for platform-specific or low-level data if required

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Example

touchStart(evt: Bg2TouchEvent) {
    console.log("Touch start:", evt.touches);
}

touchMove(evt: Bg2TouchEvent) {
    console.log("Touch move:", evt.touches);
}

touchEnd(evt: Bg2TouchEvent) {
    console.log("Touch end");
}

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Related Types

• EventBase
• AppController