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How to pick multiple objects in Spark AR Studio.

Say we have more than 5 objects that we need to keep track of. They have their own properties—like size, position, scale and material—that get updated when certain events happen—like an object tap. Keeping track of which object is selected or “active” and which is not can become complex in the Patch Editor.

Download Free And Multiplexer Example Project

5 or fewer Option Switch

For 5 or fewer options or objects, the Option Switch and Option Picker sent to Equals Exactly patches works well.

Option Switch Option Picker Equals Exactly Patch

In order to expand these options while isolating the active option, we have to test to make sure every other option is not active.

As the number of options increases, so does the complexity in determining which option is active and which is not.

5 or more And Multiplexer

The And Multiplexer is a patch that takes many inputs and produces single output; a boolean signal that lets us know which object is selected.

5 or more options with the And Multiplexer

Inputs & Output

This method of object selection uses an “And” tree to test against other possible options.

And Multiplexer Expanded; the And tree test. — And Multiplexer Expanded: the And tree test.

Master On

A pulse sent to the “Master On” input will make the boolean signal true. This is the object we are testing for. If a pulse is received at this input, it will output a true signal; letting us know that this object or option is selected.