February 2002
Intermediate to advanced
356 pages
7h 56m
English
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Chapter 11. Animating and Scripting SVG
Up to this point we have produced static images; once constructed, they never change. In this chapter, we will examine two methods of making graphic images move. The first method, animation, is movement that is controlled by you, the author. The second method, scripting, lets the person viewing the graphic interact with and modify the image.
In Chapter 10 we suggested that filters should be used as a means to enhance a graphic’s message, not as an end in themselves. This suggestion is even more crucial with animation. Drunk with the power of animation, you will be tempted to turn your every graphic into an all-dancing, all-singing, Broadway spectacular. As long as your goal is experimentation, this is fine. If your goal is to convey a message, however, nothing is worse than gratuitous use or overuse of animation. Let me state this clearly: nobody except the company CEO is interested in repeated viewing of a spinning, flashing, color-changing, strobe-lit version of the company logo.
In this chapter, our message is the animation, so most of our examples will be remarkably free of any content. We will, of course, avoid gratuitous and overwrought animation as much as possible.
Animation Basics
The animation features of SVG are based on the World Wide Web Consortium’s Synchronized Multimedia Integration Language Level 2 (SMIL2) specification http://www.w3.org/TR/smil20/. In this system, you specify the starting and ending values of the attribute, ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.