目前flash矢量图形到html5的转换，一般有两种方式： 1.转换为位图，例如：png，jpg。 2.转换为html5支持的矢量格式，例如：svg或canvas矢量绘图命令。 LavaH采用了第二种方式，同时由于LavaH使用了全局图像缓存技术，矢量图形会在运行时动态转换为最适合当前浏览器分辨率的位图，因而既有位图的渲染速度快的优点，又保持了矢量图形缩放后仍然很清晰的优点……
目前flash矢量图形到html5的转换，一般有两种方式：
1.转换为位图，例如：png，jpg。
2.转换为html5支持的矢量格式，例如：svg或canvas矢量绘图命令。
方式1渲染速度快，但是无法自适应各种屏幕分辨率，如果按大屏分辨率保存矢量图形，则占用空间大，如果按小屏分辨率保存矢量图形，则在大屏上浏览时，图形模糊或者马赛克效应严重。如果一个矢量图形在游戏中有缩放行为，由于图像是按固定分辨率保存的，所以无法做到清晰缩放。而且位图格式相比矢量格式占用空间巨大，下载到客户端消耗的流量也就大很多。
方式2没有方式1的毛病，支持任意缩放，但是效率低，尤其是较大较复杂的矢量图形，渲染时间相比位图长好多，如果同屏矢量多，会造成游戏卡顿，严重时甚至慢到无法正常玩。
LavaH采用了第二种方式，同时由于LavaH使用了全局图像缓存技术，矢量图形会在运行时动态转换为最适合当前浏览器分辨率的位图，因而既有位图的渲染速度快的优点，又保持了矢量图形缩放后仍然很清晰的优点。
看看这个例子：逃出发明家的房子，点击图形可运行。
注意墙上小鸟
点击小鸟，可以看到放大时的小鸟，非常清晰
这是因为LavaH采用的全局图像缓存技术，小鸟的矢量图形会被缓存为位图，当小鸟有放大时，会重新渲染并缓存，因为矢量图形的质量不会因为缩放而变差。
博文最后更新时间：
评论
发表评论
个人资料
姓名：李杰。
爱好：编程，慢跑。
2001年来北京发展，从事软件开发17年。
文曲星Lava语言的创造者。
Iava&LavaX跨平台语言的发明者。
Mirage引擎之父。
手机拳皇97高清版主程序。
I'd like to open a personal account https://www.gmfnouvellebeauce.com/stmap_64kncqzz.html?sleepwell.levitra.sumatriptan misoprostol cytotec harga Johnson Controls Inc. is signed to lead this initiative. The company, as opposed to taxpayers, will front all the costs. This arrangement, using LED fixtures from Cree Lighting, demonstrates how public-private partnerships â which have funded major highway projects across the country — can also be used to build, maintain and renovate core infrastructure outside of transportation, such as government buildings.
I'd like to withdraw $100, please https://www.singingriverretirement.com/stmap_64kncqzz.html?cyclopentolate.ketoconazole.levitra vigora 100 ke side effects in hindi It could have been flushed for good but the city had several things going for it: the waterfront, a rich architectural heritage, and a determined group of people â old timers and new â who could see Troy soaring again.
Are you a student? http://chassell.net/stmap_21ojktcc.html?lansoprazole.propecia.levitra foligain p5 minoxidil The Dow Jones industrial average settled up 323.09points, or 2.18 percent, at 15,126.07. The Standard & Poor's 500Index was up 36.16 points, or 2.18 percent, at 1,692.56.The Nasdaq Composite Index was up 82.97 points, or 2.26percent, at 3,760.75.
A First Class stamp http://narsg.uk/stmap_39bocxge.html?antabuse.levitra.clozapine.zocor omeprazole capsule for abortion First up is government spending itself. With federal budgets having increased dramatically in modern times, a good number of blue chip companies owe a not-insubstantial portion of their earnings to federal largess. Assuming a big compromise necessary to end the stalemate, logic says that some of this spending will be decreased at the expense of public companies increasingly reliant on it.
This is the job description https://www.sanhisoc.es/stmap_64mvltdi.html?labetalol.mirtazapine.viagra.l-tryptophan mims ranitidine NEW YORK, Oct 18 (Reuters) - The dollar slid toeight-and-a-half-month lows against the euro and a currencybasket on Friday on expectations the U.S. Federal Reserve maydelay scaling back its monetary stimulus following this month'spolitical battles over the budget.
Your account's overdrawn https://www.bridgetronic.com/stmap_64tgzttt.html?champix.mefenamic-acid.cialis.valproic ciprofloxacina cistite emorragica Penney, urgently trying to lure back shoppers this year after a failed attempt to go upmarket in 2012 led to a 25 percent drop in sales, reported a smaller decline in same-store sales for September than for August, sending shares up as much as 6.9 percent in regular trading.