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2025-01-27 07:49本頁面
【正文】 is to provide the Web with a vector graphics standard in the same way that GIF, JPG and PNG are bitmap standards. But more than this, it supports animation and user interactivity. And further, it is navigable with pan and zoom functions. This means you could use SVG in a number of different ways to suit the desired result, whether that be a detailed diagram you can zoom into without losing definition (a streetmap is a classic example), Web page interface elements or an interactive animated movie. SVG supports visual filter effects applied in real time rather than just being frames, and can include audio. One of the reasons so many people are getting interested in SVG is that it is based on XML, which is generally regarded as the next step in Web functionality. XML support in a dynamic vector graphic or animation can link it intelligently to all kinds of data, which in turn could radically alter the way Web content is delivered. As ever, there are drawbacks. One is that SVG, though accepted as an official standard, still requires a plugin for your browser to display. Although Adobe hopes that one day, SVG support will be built into all browsers, for the immediate future it involves a download of well over 2Mb. Another limitation is that precious few graphics packages can yet export to SVG other than Adobe Illustrator 9 and Photoshop 6. And this leads to the biggest drawback of all: not many people are using SVG yet and most Web users have never heard of it. All this certainly lends credence to Macromedia39。ll be limited to more conventional animation tasks. Inevitably, everyone is always on the hunt for a Web animation system that doesn39。ll find Flash is reasonably approachable。s point of view is that the really clever interactive features depend on scripting. Or to choose another word, programming. If you39。s not a plete multimedia environment. Originally, Flash arose from a project at Macromedia to make Shockwave animations, already developed for Web playback, even more pact and accessible by people with slow modems. Shockwave is still very much alive and well, and in many cases leaves Flash way behind in terms of visual quality, interactivity and multifunctionality. There39。t an officially recognised standard because well over 90 per cent of Inter users already have the plugin installed: we39。t actually a standard in the same way as HTML, GIF, JPG, PNG or something like Java. Flash is a 100 per cent proprietary format owned by Macromedia and licensed out to other graphics software developers on a mercial basis. In practice, of course, it doesn39。s credit, the Flash plugin i
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