Spark AR Scripting Examples

Welcome to the world of augmented reality (AR) and the powerful tool that makes it possible on Apple devices - Spark AR. If you're new to AR and eager to dive into scripting, you've come to the right place! This guide will introduce you to Spark AR scripting and walk you through some practical examples to get you started. Let's embark on this exciting journey!

Before we dive into the nitty-gritty of Spark AR scripting, it's essential to understand that Spark AR uses a version of the JavaScript language. So, if you're already familiar with JavaScript, you're off to a fantastic start! However, don't worry if you're not. We'll provide a gentle introduction and plenty of examples to help you grasp the basics.

Getting Started with Spark AR Scripting

Let's kick things off by creating a simple "Hello, World!" script - a classic initiation into any programming language.

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In Spark AR, scripts are written in the button or text patch of your scene. To create a "Hello, World!" script, follow these steps:

Scripting in the Button Patch

Open Spark AR Studio, create a new project, and add a button patch to your scene. Double-click on the patch to open it and write the following script:

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print("Hello, World!")

When you run the scene, you'll see "Hello, World!" printed in the console.

Scripting in the Text Patch

For this example, replace the button patch with a text patch. Double-click on the text patch, and you'll see an "Initialization" script tab. Write the following script:

text = "Hello, World!"

When you run the scene, you'll see "Hello, World!" displayed on your screen.

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Working withPatch Variables and Functions

In the previous examples, you've briefly encountered variables and functions. Let's delve deeper into these fundamental concepts with a more complex example.

Suppose you want to create a simple counter that increments each time you tap the button. Here's how you can achieve this:

Creating a Counter

Add a button and a text patch to your scene. In the text patch's "Initialization" script tab, write the following script:

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count = 0

Then, in the button patch, write:



on pressing {

  count = count + 1

  text = "Tapped " + count + " times"

}

Running this script will display a text field that increments each time you tap the button.

Using Patch Variables in Conditional Statements

Let's take it a step further and create a script that changes the text's color based on the counter's value.

First, add a material patch to your scene and connect a color input to the text patch. Then, update the button patch's script as follows:



on pressing {

  count = count + 1

  if count % 2 == 0 then

    text = "Even: " + count

    color = <color red: 0.0 green: 1.0 blue: 0.0>

  else

    text = "Odd: " + count

    color = <color red: 1.0 green: 0.0 blue: 0.0>

  end

}

Now, the text will alternate between green (even) and red (odd) each time you tap the button.

With these examples under your belt, you're well on your way to mastering Spark AR scripting. Don't be afraid to experiment and explore the endless possibilities AR has to offer. Happy scripting!