October 2017
Intermediate to advanced
548 pages
13h 23m
English
Content preview from Augmented Reality for Developers
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Scale tool with Gesture Recognizer
The next tool we'll implement is the Scale tool that lets you resize the picture. Like the Move tool, it uses an update sequencing design pattern to implement a modal manipulation tool. However, we'll use a different user scenario, and a different underlying implementation.
The Scale tool will work like this:
- Pressing and holding the button using the finger-thumb pinch gesture will activate the scale manipulation mode. The button will grow enlarged to show it is activated.
- As you continue to hold the pinch gesture and move your gaze to the right, the picture object gets bigger. Move your gaze to the left and the picture shrinks.
- Releasing the pinch gesture (unclicking the button) deactivates Move mode, ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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