Animation events in Unity - Mini Project: Build & Apply

Unity Animation Events

📖 Scenario: You are creating a simple Unity game where a character performs an animation. You want to trigger a sound effect exactly when the character's foot hits the ground during the walking animation.

🎯 Goal: Build a Unity script that uses an animation event to play a sound at a specific moment in the animation.

📋 What You'll Learn

Create an animation event function in a C# script

Add a public AudioSource variable to the script

Trigger the AudioSource.Play() method inside the animation event function

Attach the script to the character GameObject

Add an animation event in the Unity Animation window that calls the function at the correct frame

💡 Why This Matters

🌍 Real World

Animation events are used in games to sync sounds and effects with character movements, making the experience more immersive.

💼 Career

Understanding animation events is important for game developers and interactive media creators to coordinate animations with gameplay actions.

1

Create the AudioSource variable

Create a C# script called FootstepSound and inside it declare a public variable called footstepAudio of type AudioSource.

Unity

using UnityEngine;

public class FootstepSound : MonoBehaviour
{
    // Your code here
}

Need a hint?

Use public AudioSource footstepAudio; inside the class.

2

Add the animation event function

Inside the FootstepSound class, add a public method called PlayFootstepSound that calls footstepAudio.Play().

Unity

using UnityEngine;

public class FootstepSound : MonoBehaviour
{
    public AudioSource footstepAudio;

    // Add the PlayFootstepSound method below
    // Your code here
}

Need a hint?

Define public void PlayFootstepSound() and inside it call footstepAudio.Play();

3

Attach the script and assign AudioSource

Attach the FootstepSound script to your character GameObject in the Unity Editor. Then assign an AudioSource component with the footstep sound clip to the footstepAudio field in the Inspector.

Unity

// Attach the FootstepSound script to the character GameObject
// Assign the AudioSource component with the footstep clip to footstepAudio in Inspector
// Your code here

Need a hint?

Drag the AudioSource component with the footstep sound into the footstepAudio slot in the Inspector.

4

Add animation event in Animation window

Open the walking animation clip in the Unity Animation window. Add an animation event at the frame where the foot hits the ground. Set the event function to call PlayFootstepSound from the FootstepSound script.

Unity

// In the Animation window, add an animation event at the footstep frame
// Set the function name to PlayFootstepSound
// Your code here

Need a hint?

Use the Animation window's event timeline to add the event and type PlayFootstepSound as the function name.