An event produced when a pair of Shapes, one of which was a trigger, began touching. The shapes provided may have been destroyed so they should always be validated with PhysicsShape.isValid. See PhysicsWorld.triggerBeginEvents.
| Property | Description |
|---|---|
| firstGroup | Whether this is the first trigger event between the two groups the shapes belong to. Always true when either shape has no group or the world has event grouping disallowed. This is only reliable when each group's shapes all belong to one body. |
| triggerShape | The trigger shape involved in the event. |
| visitorShape | The shape that began touching the trigger shape. |