4.7 Creating Triggers for Gameplay Events

Triggers allow you to create invisible zones that activate events when entered.

Step 1: Set Up a Trigger Zone

1. Create a new GameObject (e.g., a cube).
2. In the Collider component, check Is Trigger.

Step 2: Create a Trigger Script
Attach this script to the trigger object:

void OnTriggerEnter(Collider other) {
    Debug.Log(other.gameObject.name + " entered the trigger zone!");
}

Explanation:

• OnTriggerEnter: Activates when an object enters the trigger zone.
• other.gameObject.name: Identifies the entering object.

Step 3: Test It

1. Add the trigger zone to your scene.
2. Move your player into the zone and observe the Console.

Summary of Module 4

By the end of this module, you should:

• Understand how to use Unity’s physics components (Rigidbody, Collider, Physics Materials).
• Be able to implement physics-based movement and interactions.
• Know how to create triggers and detect collisions.
• Have a basic understanding of applying forces and simulating real-world physics in your games.

Next Steps:
In Module 5: 2D Game Development, you’ll explore how 2D differs from 3D development, learn the tools specific to 2D games, and build essential components like environments, characters, and effects.