All content in this course uses:

2.2 - Activation events (Activation - Remote, Lightsource)

In this lesson, you will learn how to add unique functionality to an object when the user interacts with it in a certain way. By the end of this lesson, users will be able to pick up a remote and press a button on a controller to turn on a TV. 

Polaroid-Scripts.zip

Up to this point, you’ve only been able to pick up and put down GameObjects. Next, you’ll add a GameObject that you can do something with - or 

2.  Allow the GameObject to be picked up: 

3.  Position the remote correctly in the user’s hand when it is picked up:

GameObject, create a new empty child GameObject and name it ““Attach”. 

Add a grabbable remote control

Now you’ll make the remote make a click sound when you’re holding it and press the trigger.

2.  Give the remote the ability to play a sound:

 property, assign an audio clip you want from the 

; you can experiment with this to find a level you like.

3.  Locate the remote’s Activated event:

 component, use the foldout (triangle) to expand the 

property to see all of the event options.

4.  Play a sound when the remote is activated:

GameObject into the empty GameObject box in order to access its components.

With the remote in your hand, you should now be able to press the activate button, the controller trigger, and hear a sound.

Play a sound when the remote is activated

To provide additional feedback that the remote has been pressed, you can also turn the indicator light red when the remote is activated.

1.  Add the capability for the indicator light to turn red:

window, use the foldout (triangle) to expand the 

2.  Change the material color to red when the trigger is pressed:

 parent GameObject, at the bottom of the 

3.  Make the material revert when the activate button is released:

When you activate the remote, the indicator light should turn red and then revert to its original color when the activate button is released.

Flash a red light when the remote is activated

Before you get the button set up to turn the TV on, you should make sure the TV in the scene can successfully play video. If you didn’t add one before, go ahead and do it now. 

) to project the video to its material rather than its texture. 

3.  Add additional video control functionality:

component. This is a custom script we’ve provided that enables a GameObject to play videos from a list or a single clip, with optional start-on-load, using a video material for display and controls for play, pause, stop, and navigation.

property to have the video play automatically.

4.  Select the video to play on the screen: 

Now when you run your application, the video should play automatically on the TV Screen with 3D audio.

Allow the TV to play video

Now that the TV is working, you need to be able to control it with the remote.

1.  Stop the video from playing automatically:

2.  Locate the Remote’s Interaction events:

3.  Trigger the TV when the remote is activated:

function, depending on whether you want it to pause or stop when pressed a second time.

When you activate the remote, the video on the TV should alternate between playing and pausing or stopping.

Control the TV with the remote

Recap


If you want to further develop your skills, explore new concepts, and improve your project, check out some of the optional extension activities below. 

Each one is tagged as [Easy], [Medium], [Difficult], or [Expert] and will also include a [Requires Programming] tag if some coding is required. 

Make a phone that plays a video when you press the trigger:

 child GameObject, then rotate and scale as needed.

 child GameObject with a material similar to the way the TV screen is set up.

Try making the phone cycle through multiple videos using the 

2.  Add a functioning flashlight [Medium]

Add a working flashlight into the scene that toggles on and off when you press the trigger, including making a clicking sound to provide audio feedback:

 function to switch the light on and off. 

3.  Add a functional lighter and candle that can be lit with it [Difficult]

Add a lighter to the scene that produces a flame when you activate it. If the flame gets close to a candle, that candle can be lit.

Collider component, the Is Trigger property,

 script to detect when an GameObject with a particular tag has entered the trigger.

4.  Add a dart gun or stapler projectile [Expert]

Add a dart gun that shoots darts or a stapler that shoots staples when you press the trigger:

Locate the prefabs for the GameObjects and projectiles in the 

 folder to make the projectile disappear after a certain amount of time.

: Make the stapler swing open with a hinge joint.

: Add sounds for when the GameObject is launched. 

5.  Add a functioning polaroid camera  [Expert] [Requires Programming]

Add a functioning polaroid camera that allows you to preview on a viewfinder screen and print a photo using the trigger:

For the viewfinder screen, look at how the mirror is set up with a render texture.

Don’t worry if the camera is currently rendering your rays for now - you’ll learn how to hide your rays in the next tutorial.

If you want some help, download the example

Extension Activities

Comp-L2-Prog.VRp: Beginner VR Development

Beginner VR Development

Aaron Sharp

2.2.ext - phone video.mp4

2.2.ext - flashlight (1).mp4

2.2.ext - polaroid camera (1).mp4

2.2.ext - Dart gun and Stapler (1).mp4

2.2.ext - lighter_candle.mp4

2_2_recap_v1.mp4

2.2.1.mp4

2.2.2.mp4

2.2.3.mp4

2.2.4.mp4

2.2.5.mp4

By the end of this lesson, you will be able to:

Trigger actions based on interactions with a specific object in order to add additional functionality to an object (e.g. when an object is selected, when it is activated, etc).  

Games

Film

Automotive

Skill-L2-Prog.VRp-2: Develop a VR app that demonstrates common interactions using Unity's XR interaction toolkit.

Unity Version 6.2