Physics Events

When colliding, the collider will produce physical a behavior, however the trigger will not. Therefore, the trigger only performs collision detection. The collider performs both collision detection and physical simulation. The difference between them:

A Trigger is a Collider component whose property is true. When a collision occurs, the Trigger does not produce collision effect, so the Trigger is only used for collision detection.

The differences between Trigger and Collider are as follows:

• Trigger do not perform finer detection with other triggers or colliders.

Trigger Events and Collision Events

The differences between Trigger events and Collision events are as follows:

• Trigger events are generated by triggers, and collision events are generated based on collision data.
• The trigger event can be generated by the trigger with another trigger or another collider.
• Collision events need to be generated by two colliders and at least one dynamic rigid body.

Where the collision pairs that can generate trigger events are:

Listen to trigger events

In order to add listeners to the trigger event, you need to add the corresponding callback by registering the event:

1. Get Collider through this.getComponent(Collider)
2. Register the callback of the corresponding event through the on or once method of Collider

Code example:

Collision Events

Collision events are divided into three types:

Where the collision pairs that can generate collision events are:

Listen to collision events

In order to add a listener to the collision event, you need to add the corresponding callback by registering the event:

1. Get Collider through this.getComponent(Collider)
2. Register the callback of the corresponding event through the on or once method of Collider

    let collider = this.getComponent(Collider);
}
private onCollision (event: ICollisionEvent) {
    console.log(event.type, event);
}